Voltage multiplier and driver circuit

Details Voltage multiplier and driver circuit Voltage multiplier and driver circuit

1979-09-19

1981-09-22

Shoop, William M.

Electric power conversion systems

Current conversion

With voltage multiplication means

H02H 725

Patent

active

042913691

ABSTRACT:
A voltage multiplier and driver circuit for energizing a backlight or lamp device in a timepiece. The circuit includes switching transistors responsive to an alternating signal for alternately disconnecting the lamp (load) while a capacitor is connected across a DC voltage source and for reconnecting the lamp (load) across a series (voltage additive) connection of the DC voltage source and the charged capacitor. The alternating signal frequency and duty cycle are selected to energize the lamp (load) to a predetermined color temperature.

REFERENCES:
patent: 3944908 (1976-03-01), Oki
patent: 3997832 (1976-12-01), Tanaka et al.
patent: 4134057 (1979-01-01), Portmann

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