A modulated Class E transmitter is disclosed. In one embodiment of the invention, the modulated Class E oscillator achieves high coil currents (˜1 A) and voltages (˜500V) with low power components by precisely timed injection of current when the oscillating current in the inductor passes through zero....http://www.google.ca/patents/US6889087?utm_source=gb-gplus-sharePatent US6889087 - Switched reactance modulated E-class oscillator design
