In a drive circuit for driving an electroluminescent device having an electroluminescent lamp, a battery, and a frequency divider circuit for generating a plurality of signals, including a first signal, the improved voltage-boosting circuit comprising first and second inductors electrically connected...http://www.google.ca/patents/US5418434?utm_source=gb-gplus-sharePatent US5418434 - Voltage-boosting circuit for an electroluminescent lamp driver
