Power supplies for electronic device

Details Power supplies for electronic device Power supplies for electronic device

1991-07-18

1992-07-14

Miska, Vit W.

Horology: time measuring systems or devices

Power supply details

Electrical

G04B 100, G04C 300

Patent

active

051309602

ABSTRACT:
An electronic device, in a preferred embodiment an electronic watch, including a power generating device, a secondary power source for storing generated electric energy fed from the power generating device and serving as the power source for the electronic device, a first boosting circuit for stepping up the voltage of the secondary power source, a second boosting circuit, and a capacitor connected to the output of the first boosting circuit and charged through the output of the first boosting circuit, for stepping up the voltage of the capacitor. A voltage level converter converts a control signal based on the first boosting circuit output voltage to a control signal based on the second boosting circuit output to at least in part control the operation of the first boosting circuit. In this manner, the boosting circuits control the operation of the device such that when the voltage lever is low or the voltage level reaches a certain point the device does not shut down, but rather maintains normal operation.

REFERENCES:
patent: 4270194 (1981-05-01), Morokaua et al.
patent: 4286263 (1981-08-01), Lindberg
patent: 4653931 (1987-03-01), Takeda
patent: 4730287 (1988-03-01), Yoshino et al.
patent: 5001685 (1991-03-01), Hayakawa

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