CN103929155A - Pulse width broadening circuit - Google Patents
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- CN103929155A CN103929155A CN201410181436.5A CN201410181436A CN103929155A CN 103929155 A CN103929155 A CN 103929155A CN 201410181436 A CN201410181436 A CN 201410181436A CN 103929155 A CN103929155 A CN 103929155A
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Abstract
A pulse width broadening circuit comprises an electronic switch, a first resistor, a second resistor, a first capacitor and a first electronic switch module, wherein the electronic switch is used for selectively conducting connection or disconnection according to the level type of a pulse input signal of a control end, the first connecting end of the electronic switch is connected with a direct-current power source through the first resistor, and is ground through the first capacitor, and the second connecting end of the electronic switch is grounded; the control end of the first electronic switch module is connected with the first connecting end of the electronic switch, the first connecting end of the first electronic switch module is connected with the second connecting end of a first signal and is further connected with the direct-current power source through the second resistor, and the second connecting end of the first electronic switch module is grounded; when the control end voltage of the first electronic switch module is smaller than the first opening voltage of the first electronic switch module, the first connecting end and the second connecting end are disconnected, and when the control end voltage of the first electronic switch module is equal to or larger than the first opening voltage, the first connecting end is connected with the second connecting end. Energy consumption and interference signals can be reduced, and the pulse signals with various pulse widths can be conveniently deployed.
Description
Technical field
The present invention relates to a kind of pulse detection field, relate in particular to a kind of pulse duration and widen circuit.
Background technology
At present, electronic equipment is if the microprocessor of television set is by poll system identification input the second connectivity port mostly, if when the prime output circuit of electronic equipment or feedback circuit send improper narrow pulse signal (as the signal of the pulse duration of 100 microseconds to 10 millisecond) to microprocessor, microprocessor will be difficult to identify pulse signal, unless improved the poll speed of microprocessor, but can take even all resources of microprocessor major part, make microprocessor cannot process other work.
For improving the narrow pulse signal recognition performance of microprocessor, generally widen device and widen the width of narrow pulse signal by pulse duration, but, existing pulse duration is widened the circuit structure complexity of device, can increase the energy consumption of electronic equipment, also easily produce the interference signals such as parasitic vibrational waveform, affect signal stabilization, and often can only widen the pulsewidth of a certain scope.
Summary of the invention
For the deficiencies in the prior art, object of the present invention is intended to provide a kind of pulse duration solving the problems of the technologies described above to widen circuit.
For achieving the above object, the present invention adopts following technical scheme:
A kind of pulse duration is widened circuit, and it comprises electronic switch, the first resistance, the second resistance, the first electric capacity and the first electronic switch module; Described electronic switch comprises the second link, the first link and for receiving the control end of a pulse input signal, and described electronic switch is for according to the ground conducting of level type selecting or the cut-off of pulse input signal; The first link of described electronic switch connects a DC power supply by described the first resistance, also by described the first capacity earth, and the second link ground connection of described electronic switch; Described the first electronic switch module comprises control end, the first link and the second link, the control end of the first electronic switch module connects the first link of described electronic switch, the first link of described the first electronic switch module connects first signal second link, also connect described DC power supply by the second resistance, the second link ground connection of described the first electronic switch module; Described the first electronic switch module is preset one first cut-in voltage, and described the first cut-in voltage is less than the output voltage of above-mentioned DC power supply; In the time that the voltage of the control end of the first electronic switch module is less than described the first cut-in voltage, between the first link of described the first electronic switch module and the second link, end, in the time that the voltage of the control end of the first electronic switch module is equal to or greater than described the first cut-in voltage, conducting between the first link of described the first electronic switch module and the second link, so that described first signal the second link output one first pulse output signals.
In one embodiment, described electronic switch is field effect transistor, and in the time that described field effect transistor is N channel field-effect pipe, the control end of described electronic switch, the first link and the second link correspond to grid, drain electrode and the source electrode of field effect transistor; In the time that described field effect transistor is P-channel field-effect transistor (PEFT) pipe, the control end of described electronic switch, the first link and the second link correspond to grid, source electrode and the drain electrode of field effect transistor.Further, described the first electronic switch module is field effect transistor, and in the time that described field effect transistor is N channel field-effect pipe, the control end of described the first electronic switch module, the first link and the second link correspond to grid, drain electrode and the source electrode of field effect transistor; In the time that described field effect transistor is P-channel field-effect transistor (PEFT) pipe, the control end of described the first electronic switch module, the first link and the second link correspond to grid, source electrode and the drain electrode of field effect transistor; The cut-in voltage that described the first cut-in voltage is described field effect transistor.
In another embodiment, described the first electronic switch module is triode, in the time that described triode is NPN type triode, the control end of described the first electronic switch module, the first link and the second link correspond to base stage, the collector and emitter of NPN type triode; In the time that described triode is positive-negative-positive triode, the control end of described the first electronic switch module, the first link and the second link correspond to base stage, the emitter and collector of positive-negative-positive triode; The cut-in voltage that described the first cut-in voltage is described triode.
Further, described the first electronic switch module also comprises comparator, and the output of described comparator connects the base stage of described triode, and in-phase end corresponds to the control end of described the first electronic switch module, and end of oppisite phase connects a reference voltage generation unit.
In another embodiment, described the first electronic switch module is controllable accurate source of stable pressure, control end, the first link and second link of the first electronic switch module corresponds to reference edge, cathode terminal and the anode tap of controllable accurate source of stable pressure, and described the first cut-in voltage is the reference voltage of described controllable accurate source of stable pressure.
Further, this pulse duration is widened circuit and is also comprised the second electric capacity, the 3rd resistance and the second electronic switch module; The control end of described the second electronic switch module connects the first link of described the first electronic switch module, also by described the second capacity earth, the first link of described the second electronic switch module connects secondary signal second link, also connect described DC power supply by the 3rd resistance, the second link ground connection of described the second electronic switch module; Described the second electronic switch module is preset one second cut-in voltage, in the time that the voltage of the control end of the second electronic switch module is less than described the second cut-in voltage, between the first link of described the second electronic switch module and the second link, end, in the time that the voltage of the control end of the second electronic switch module is equal to or greater than described the second cut-in voltage, conducting between the first link of described the second electronic switch module and the second link, so that described secondary signal the second link output one second pulse output signals.
Further, described the second electronic switch module is field effect transistor or triode.
Further, in the time that described field effect transistor is N channel field-effect pipe, control end, the first link and second link of described the second electronic switch module corresponds to grid, drain electrode and the source electrode of field effect transistor, the cut-in voltage that described the second cut-in voltage is described field effect transistor; In the time that described field effect transistor is P-channel field-effect transistor (PEFT) pipe, the control end of described the second electronic switch module, the first link and the second link correspond to grid, source electrode and the drain electrode of field effect transistor; The cut-in voltage that described the second cut-in voltage is described field effect transistor.
Further, in the time that described the second electronic switch module is NPN type triode, the control end of described the second electronic switch module, the first link and the second link correspond to base stage, the collector and emitter of NPN type triode; In the time that described triode is positive-negative-positive triode, the control end of described the second electronic switch module, the first link and the second link correspond to base stage, the emitter and collector of positive-negative-positive triode; The cut-in voltage that described the second cut-in voltage is described triode.
Beneficial effect of the present invention is as follows:
1, the resistance of corresponding the first resistance of the pulsewidth of above-mentioned the first pulse output signals size is multiplied by the numerical value of the capacitance gained of the first electric capacity, by selecting the first resistance of suitable resistance and the first electric capacity of suitable capacitance can obtain suitable numerical value, and allocate the relation between above-mentioned numerical value and above-mentioned the first cut-in voltage, can produce by this circuit the pulse output signals of various pulsewidths, thereby make the applicable various electronic equipments of this circuit.As can be seen here, the present invention not only circuit is simple, is conducive to reduce energy consumption and interference signal, also can be according to the convenient pulse signal that mixes simply various pulsewidths of the demand of various electronic equipments.
2, the first electronic switch module adopts combination and the controllable accurate source of stable pressure of field effect transistor, triode, triode and comparator; While adopting controllable accurate source of stable pressure, due to controllable accurate source of stable pressure be subject to temperature float and batch impact little, can make this pulse duration widen the pulse-width regulated control of circuit more accurate.
3, after the processing of above-mentioned the first pulse output signals by described the second electric capacity, the 3rd resistance and the second electronic switch module, generate above-mentioned the second pulse output signals, described the second pulse output signals has steeper rising edge and trailing edge than the waveform of the first pulse output signals, can meet better the electronic equipment that some are had relatively high expectations to waveform.
Brief description of the drawings
Fig. 1 is the circuit diagram that pulse duration of the present invention is widened the first embodiment of circuit.
Fig. 2 is the waveform schematic diagram of the pulse duration of Fig. 1 some signals of widening circuit.
Fig. 3 is the circuit diagram that pulse duration of the present invention is widened the second embodiment of circuit.
Fig. 4 is the circuit diagram that pulse duration of the present invention is widened the 3rd embodiment of circuit.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described further:
Refer to Fig. 1, for a kind of pulse duration of first embodiment of the invention is widened circuit, its preferred embodiments comprises that field effect transistor Q4 is to field effect transistor Q6, resistance R 1 to resistance R 3, capacitor C 1 and capacitor C 2.The grid of described field effect transistor Q6 is used for receiving a pulse input signal LOCKN, and the drain electrode of described field effect transistor Q6 connects a DC power supply VCC by described resistance R 1, also by capacitor C 1 ground connection, and the source ground of described field effect transistor Q6.The grid of described field effect transistor Q5 connects the drain electrode of described field effect transistor Q6, and the drain electrode of described field effect transistor Q5 connects described DC power supply VCC by described resistance R 2, the source ground of described field effect transistor Q5.The grid of described field effect transistor Q4 connects the drain electrode of described field effect transistor Q5, and also, by capacitor C 2 ground connection, the drain electrode of described field effect transistor Q4 connects described DC power supply VCC by resistance R 3, the source ground of described field effect transistor Q4.
Please also refer to Fig. 2, below the operation principle of the present embodiment is described, wherein, waveform V0, V1, V2, the V3 in Fig. 2 is respectively waveform, the waveform of grid voltage of field effect transistor Q4 and the waveform of the drain voltage of field effect transistor Q4 of the grid voltage of waveform, the field effect transistor Q5 of the grid voltage of field effect transistor Q6:
When the signal receiving when the grid of described field effect transistor Q6 is the high level of pulse input signal LOCKN, field effect transistor Q6 conducting, described capacitor C 1 is discharged by field effect transistor Q6, so that the electric energy of capacitor C 1 is discharged entirely.
When the signal saltus step receiving when the grid of field effect transistor Q6 is the low level of pulse input signal LOCKN, field effect transistor Q6 cut-off, DC power supply VCC is charged to capacitor C 1 by resistance R 1, and then the grid voltage of field effect transistor Q5 is increased gradually from zero, until reach the cut-in voltage of field effect transistor Q5, now, field effect transistor Q5 conducting, capacitor C 2 is discharged by field effect transistor Q5, the grid voltage of field effect transistor Q4 is reduced gradually, until be less than the cut-in voltage of field effect transistor Q4, and then field effect transistor Q4 is ended, now, the drain electrode of field effect transistor Q4 is drawn high to high level by resistance R 3 and DC power supply VCC, the drain electrode of field effect transistor Q4 is this circuit for exporting signal the second link of pulse output signals LOCK-BACK.
When the signal saltus step receiving when the grid of field effect transistor Q6 is the high level of pulse input signal LOCKN, field effect transistor Q6 conducting, capacitor C 1 is discharged by field effect transistor Q6, and then the grid voltage of field effect transistor Q5 is diminished gradually, until be less than the cut-in voltage of field effect transistor Q5, now, field effect transistor Q5 cut-off, DC power supply VCC is charged to capacitor C 2 by resistance R 2, and then the grid voltage that makes field effect transistor Q4 becomes large gradually, until reach the cut-in voltage of field effect transistor Q4, now field effect transistor Q4 conducting, signal second link of this circuit is dragged down, start to export the low level of pulse output signals LOCK-BACK.
From foregoing circuit structure and operation principle, field effect transistor Q6 plays the effect of electronic switch, grid, drain electrode and the source electrode of field effect transistor Q6 corresponds to control end, the first link and second link of electronic switch, and described electronic switch is according to the ground conducting of level type selecting or the cut-off of pulse input signal.For example, when described electronic switch is P-channel field-effect transistor (PEFT) pipe, it is according to the corresponding conducting of low level or the corresponding cut-off of high level.When described electronic switch is N channel field-effect pipe, it is according to the corresponding conducting of high level or the corresponding cut-off of low level.
Wherein, the charge constant of capacitor C 1 is R*C, wherein, R is the resistance of resistance R 1, and C is the capacitance of capacitor C 1, gets final product by the numerical value of adjusting R*C the width that corresponding regulating impulse input signal is widened, adjust debugging convenient and simple, be suitable for and widen various required pulse durations.
In the present embodiment, field effect transistor Q5 and field effect transistor Q4 all play the effect of electronic switch module, for example, in the present embodiment, field effect transistor Q5 is as the first electronic switch module, the grid of field effect transistor Q5, drain electrode and source electrode correspond to the control end of the first electronic switch module, the first link and the second link, the first electronic switch module is preset one first cut-in voltage, and described the first cut-in voltage is less than the output voltage of above-mentioned DC power supply VCC, in the time that the voltage of the control end of the first electronic switch module is less than described the first cut-in voltage, between the first link of described the first electronic switch module and the second link, end, in the time that the voltage of the control end of the first electronic switch module is equal to or greater than described the first cut-in voltage, conducting between the first link of described the first electronic switch module and the second link, thereby export the first pulse output signals by the drain electrode of field effect transistor Q5.
Field effect transistor Q4 is as the second electronic switch module, the grid of field effect transistor Q4, drain electrode and source electrode correspond to the control end of the second electronic switch module, the first link and the second link, the second electronic switch module is preset one second cut-in voltage, and described the second cut-in voltage is less than the output voltage of above-mentioned DC power supply VCC, in the time that the voltage of the control end of the second electronic switch module is less than described the second cut-in voltage, between the first link of described the second electronic switch module and the second link, end, in the time that the voltage of the control end of the second electronic switch module is equal to or greater than described the second cut-in voltage, conducting between the first link of described the second electronic switch module and the second link, thereby export the second pulse output signals by the drain electrode of field effect transistor Q4, wherein, this second pulse output signals is to widen circuit through the pulse duration of the present embodiment to carry out the pulse output signals after pulse duration is widened, (for example can outwards export, exporting to MCU detects).
In the present embodiment, field effect transistor Q4 all uses N channel field-effect pipe to field effect transistor Q6, but understandable, and field effect transistor Q4 also can use P-channel field-effect transistor (PEFT) pipe to field effect transistor Q6, does not affect its implementation result.For example, in the time that field effect transistor Q6 (electronic switch) uses as P-channel field-effect transistor (PEFT) pipe, control end, the first link and second link of described electronic switch corresponds to grid, source electrode and the drain electrode of field effect transistor.In like manner, if when field effect transistor Q4 uses P-channel field-effect transistor (PEFT) pipe to field effect transistor Q5, corresponding annexation is also like this.
In addition, described field effect transistor Q4 is to field effect transistor Q6 also replaceable one-tenth triode, positive-negative-positive or NPN type triode all can, do not affect its implementation result.
Understandable, in the present embodiment, resistance R 3, field effect transistor Q4 and capacitor C 2 can make the waveform of pulse output signals LOCK_BACK have steeper rising edge and trailing edge.In other embodiment, if less demanding to waveform, can remove resistance R 3, field effect transistor Q4 and capacitor C 2, pulse output signals LOCK_BACK directly exports from the drain electrode of field effect transistor Q5, exportablely detects to MCU.
In addition, widening circuit through the pulse duration of the present embodiment, to carry out pulse output signals LOCK_BACK after pulse duration is widened (by the drain electrode output of field effect transistor Q4) be anti-phase with pulse input signal LOCKN; The pulse output signals LOCK_BACK directly exporting from the drain electrode of field effect transistor Q5 after resistance R 3, field effect transistor Q4 and capacitor C 2 if remove is with pulse input signal LOCKN homophase, if desired waveform is anti-phase, field effect transistor Q6 can be changed into P-channel field-effect transistor (PEFT) pipe or add one-level negative circuit, the pulse output signals LOCK_BACK directly exporting from the drain electrode of field effect transistor Q5 is passed through outwards to export negative circuit again.
Refer to Fig. 3, for a kind of pulse duration of second embodiment of the invention is widened circuit, it is basic identical that pulse duration shown in its circuit structure and Fig. 1 is widened circuit structure, noly be, above-mentioned the first electronic switch module that the pulse duration of the present embodiment is widened circuit adopts triode Q5 ', comparator U0 and reference voltage generation unit (can be made up of DC power supply and some resistance, the reference voltage that for example the present embodiment generates is 2.5V) the field effect transistor Q5 of alternative embodiment one, the in-phase end 1 of comparator U0 corresponds to the control end of the first electronic switch module, the end of oppisite phase 2 of comparator U0 connects described reference voltage generation unit, the output 3 of comparator U0 connects the base stage of described triode Q5 '.In the present embodiment, when described triode Q5 ' is NPN type triode, the first link of described the first electronic switch module and the second link correspond to the collector and emitter of triode Q5 '; Understandable, when described in this, triode Q5 ' also can be positive-negative-positive triode, the first link of described the first electronic switch module and the second link correspond to the emitter and collector of positive-negative-positive triode.The pulse duration of the present embodiment is widened circuit and can be realized with the pulse duration of the first embodiment and widen the consistent beneficial effect of circuit.And the present embodiment increases a voltage comparator U0 at the front end of triode Q5 ', make circuit be unlikely to affected by other factors such as temperature and cause the reference voltage of comparison to have large-scale fluctuation and cause widening the wide variation of multiple.
Referring to Fig. 4, for a kind of pulse duration of the fourth embodiment of the present invention is widened circuit, it is basic identical that the pulse duration of the first embodiment shown in its circuit structure and Fig. 1 is widened circuit, different, the present embodiment adopts controllable accurate source of stable pressure U5 to replace field effect transistor Q5 as above-mentioned the first electronic switch module.Control end, the first link and second link of above-mentioned the first electronic switch module corresponds to reference edge R, cathode terminal K and the anode tap A of controllable accurate source of stable pressure U5.The reference voltage that is less than controllable accurate source of stable pressure U5 when the voltage (being the voltage of capacitor C 1) of the reference edge R of controllable accurate source of stable pressure U5 is during as 2.5 volts (positive cut-in voltage of corresponding electronic switch module), between the cathode terminal K of controllable accurate source of stable pressure U5 and anode tap A, end, in the time that the voltage of the reference edge R of controllable accurate source of stable pressure U5 is equal to or greater than the reference voltage of controllable accurate source of stable pressure U5, conducting between the cathode terminal K of controllable accurate source of stable pressure U5 and anode tap A.Due to controllable accurate source of stable pressure U5 be subject to temperature float and batch impact little, therefore relatively above-mentioned field effect transistor Q5, adopts controllable accurate source of stable pressure U5 can make this pulse duration widen the pulse-width regulated control of circuit more accurate.In the present embodiment, can to adopt model be the controllable accurate source of stable pressure chip of TL431 to controllable accurate source of stable pressure U5.In addition, the DC power supply VCC of the present embodiment can not be less than 2.5V, and it is good that VCC is more than or equal to 3.3V, is preferably 5V.
Understandable, in the present invention, in above-described embodiment 1～embodiment 4, the mentioned circuit structure arriving, every components and parts or circuit module that possesses above-mentioned electronic switch or electronic switch module function is all suitable for this circuit, and this is no longer going to repeat them.
In sum, beneficial effect of the present invention is as follows:
1, the resistance of corresponding the first resistance of the pulsewidth of above-mentioned the first pulse output signals size is multiplied by the numerical value of the capacitance gained of the first electric capacity, by selecting the first resistance of suitable resistance and the first electric capacity of suitable capacitance can obtain suitable numerical value, and allocate the relation between above-mentioned numerical value and above-mentioned the first cut-in voltage, can produce by this circuit the pulse output signals of various pulsewidths, thereby make the applicable various electronic equipments of this circuit.As can be seen here, the present invention not only circuit is simple, is conducive to reduce energy consumption and interference signal, also can be according to the convenient pulse signal that mixes simply various pulsewidths of the demand of various electronic equipments.
2, when the first electronic switch module adopts the combination of field effect transistor, triode, triode and comparator and controllable accurate source of stable pressure; While adopting controllable accurate source of stable pressure, due to controllable accurate source of stable pressure be subject to temperature float and batch impact little, can make this pulse duration widen the pulse-width regulated control of circuit more accurate.
3, after the processing of above-mentioned the first pulse output signals by described the second electric capacity, the 3rd resistance and the second electronic switch module, generate above-mentioned the second pulse output signals, described the second pulse output signals has steeper rising edge and trailing edge than the waveform of the first pulse output signals, can meet better the electronic equipment that some are had relatively high expectations to waveform.
For a person skilled in the art, can be according to technical scheme described above and design, make other various corresponding changes and distortion, and these all changes and distortion all should belong to the protection range of the claims in the present invention within.
Claims (9)
1. pulse duration is widened a circuit, it is characterized in that: comprise electronic switch, the first resistance, the second resistance, the first electric capacity and the first electronic switch module;
Described electronic switch comprises the first link, the second link and for receiving the control end of a pulse input signal, and described electronic switch is for according to the ground conducting of level type selecting or the cut-off of pulse input signal; The first link of described electronic switch connects a DC power supply by described the first resistance, also by described the first capacity earth, and the second link ground connection of described electronic switch;
Described the first electronic switch module comprises control end, the first link and the second link, the control end of the first electronic switch module connects the first link of described electronic switch, the first link of described the first electronic switch module connects first signal second link, also connect described DC power supply by the second resistance, the second link ground connection of described the first electronic switch module; Described the first electronic switch module is preset one first cut-in voltage, and described the first cut-in voltage is less than the output voltage of described DC power supply;
In the time that the voltage of the control end of the first electronic switch module is less than described the first cut-in voltage, between the first link of described the first electronic switch module and the second link, end, in the time that the voltage of the control end of the first electronic switch module is equal to or greater than described the first cut-in voltage, conducting between the first link of described the first electronic switch module and the second link, so that described first signal the second link output one first pulse output signals.
2. pulse duration as claimed in claim 1 is widened circuit, it is characterized in that: described electronic switch is field effect transistor or triode, in the time that described electronic switch is N channel field-effect pipe, the control end of described electronic switch, the first link and the second link correspond to grid, drain electrode and the source electrode of field effect transistor; In the time that described field effect transistor is P-channel field-effect transistor (PEFT) pipe, the control end of described electronic switch, the first link and the second link correspond to grid, source electrode and the drain electrode of field effect transistor; In the time that described electronic switch is NPN type triode, the control end of described electronic switch, the first link and the second link correspond to base stage, the collector and emitter of NPN type triode; In the time that described triode is positive-negative-positive triode, the control end of described electronic switch, the first link and the second link correspond to base stage, the emitter and collector of positive-negative-positive triode.
3. pulse duration as claimed in claim 1 or 2 is widened circuit, it is characterized in that: described the first electronic switch module is field effect transistor, in the time that described field effect transistor is N channel field-effect pipe, the control end of described the first electronic switch module, the first link and the second link correspond to grid, drain electrode and the source electrode of field effect transistor; In the time that described field effect transistor is P-channel field-effect transistor (PEFT) pipe, the control end of described the first electronic switch module, the first link and the second link correspond to grid, source electrode and the drain electrode of field effect transistor; The cut-in voltage that described the first cut-in voltage is described field effect transistor.
4. pulse duration as claimed in claim 1 or 2 is widened circuit, it is characterized in that: described the first electronic switch module is made up of triode, comparator and reference voltage unit, the output of described comparator connects the base stage of described triode, in-phase end corresponds to the control end of described the first electronic switch module, end of oppisite phase connects described reference voltage generation unit, in the time that described triode is NPN type triode, the control end of described the first electronic switch module, the first link and the second link correspond to base stage, the collector and emitter of NPN type triode; In the time that described triode is positive-negative-positive triode, the control end of described the first electronic switch module, the first link and the second link correspond to base stage, the emitter and collector of positive-negative-positive triode; The cut-in voltage that described the first cut-in voltage is described triode.
5. pulse duration as claimed in claim 1 or 2 is widened circuit, it is characterized in that: described the first electronic switch module is controllable accurate source of stable pressure, control end, the first link and second link of the first electronic switch module corresponds to reference edge, cathode terminal and the anode tap of controllable accurate source of stable pressure, and described the first cut-in voltage is the reference voltage of described controllable accurate source of stable pressure.
6. pulse duration as claimed in claim 1 is widened circuit, it is characterized in that: also comprise the second electric capacity, the 3rd resistance and the second electronic switch module; The control end of described the second electronic switch module connects the first link of described the first electronic switch module, also by described the second capacity earth, the first link of described the second electronic switch module connects secondary signal second link, also connect described DC power supply by the 3rd resistance, the second link ground connection of described the second electronic switch module; Described the second electronic switch module is preset one second cut-in voltage, in the time that the voltage of the control end of the second electronic switch module is less than described the second cut-in voltage, between the first link of described the second electronic switch module and the second link, end, in the time that the voltage of the control end of the second electronic switch module is equal to or greater than described the second cut-in voltage, conducting between the first link of described the second electronic switch module and the second link, so that described secondary signal the second link output one second pulse output signals.
7. pulse duration as claimed in claim 6 is widened circuit, it is characterized in that: described the second electronic switch module is field effect transistor or triode.
8. pulse duration as claimed in claim 7 is widened circuit, it is characterized in that: in the time that described the second electronic switch module is N channel field-effect pipe, control end, the first link and second link of described the second electronic switch module corresponds to grid, drain electrode and the source electrode of field effect transistor, the cut-in voltage that described the second cut-in voltage is described field effect transistor; In the time that described field effect transistor is P-channel field-effect transistor (PEFT) pipe, the control end of described the second electronic switch module, the first link and the second link correspond to grid, source electrode and the drain electrode of field effect transistor; The cut-in voltage that described the second cut-in voltage is described field effect transistor.
9. pulse duration as claimed in claim 7 is widened circuit, it is characterized in that: in the time that described the second electronic switch module is NPN type triode, the control end of described the second electronic switch module, the first link and the second link correspond to base stage, the collector and emitter of NPN type triode; In the time that described triode is positive-negative-positive triode, the control end of described the second electronic switch module, the first link and the second link correspond to base stage, the emitter and collector of positive-negative-positive triode; The cut-in voltage that described the second cut-in voltage is described triode.
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| CN201410181436.5A CN103929155B (en) | 2014-04-30 | 2014-04-30 | Pulse width broadening circuit |
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| CN106408815A (en) * | 2016-12-01 | 2017-02-15 | 蔡春良 | Vibration accumulated alarm method and apparatus |
| CN107272485A (en) * | 2017-06-16 | 2017-10-20 | 中国科学院苏州生物医学工程技术研究所 | A kind of pulse signal acquisition device and method based on low speed ADC |
| CN108666972A (en) * | 2017-04-01 | 2018-10-16 | 苏州益而益电器制造有限公司 | Earth leakage protective device |
| CN109755921A (en) * | 2017-11-08 | 2019-05-14 | 苏州益而益电器制造有限公司 | Ground-fault interrupter |
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| US4578597A (en) * | 1982-03-05 | 1986-03-25 | Sony Corporation | Large amplitude pulse generating circuits |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106408815A (en) * | 2016-12-01 | 2017-02-15 | 蔡春良 | Vibration accumulated alarm method and apparatus |
| CN108666972A (en) * | 2017-04-01 | 2018-10-16 | 苏州益而益电器制造有限公司 | Earth leakage protective device |
| CN108666972B (en) * | 2017-04-01 | 2024-04-19 | 苏州益而益电器制造有限公司 | Leakage protector |
| CN107272485A (en) * | 2017-06-16 | 2017-10-20 | 中国科学院苏州生物医学工程技术研究所 | A kind of pulse signal acquisition device and method based on low speed ADC |
| CN109755921A (en) * | 2017-11-08 | 2019-05-14 | 苏州益而益电器制造有限公司 | Ground-fault interrupter |
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| Publication number | Publication date |
|---|---|
| CN103929155B (en) | 2017-01-11 |
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