Power circuit for electronic timepiece

Details Power circuit for electronic timepiece Power circuit for electronic timepiece

1981-07-31

1983-09-13

Shoop, William M.

Electric power conversion systems

Current conversion

With voltage multiplication means

363 62, 368204, H02M 318

Patent

active

044046243

ABSTRACT:
A power circuit for an electronic timepiece having a liquid crystal display includes a voltage regulation circuit, a voltage reduction circuit and a voltage booster circuit. In normal operation the voltage reduction circuit operates to drive the timekeeping circuits and extend battery life. When battery voltage drops due to heavy load, such as an alarm or lamp, the voltage regulation circuit and booster circuits operate to drive the timekeeping circuits and liquid crystal display respectively. The same transistors operate in the voltage reduction and booster circuits.

REFERENCES:
patent: 3553479 (1971-01-01), Nelson
patent: 3787757 (1974-01-01), Sheng
patent: 3999368 (1976-12-01), Yoshida
patent: 4094137 (1978-06-01), Morokawa
patent: 4259715 (1981-03-01), Monokawa
patent: 4290100 (1981-09-01), Squires

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