Electronic timepiece having a stepping motor and driving circuit

Details Electronic timepiece having a stepping motor and driving circuit Electronic timepiece having a stepping motor and driving circuit

1980-07-10

1984-02-21

Reynolds, B. A.

Horology: time measuring systems or devices

Power supply details

Electrical

368 66, 368 85, 368217, 368157, 340636, 318696, G04B 900

Patent

active

044334010

ABSTRACT:
An electronic timepiece comprising a power source, an electronic circuit, a stepping motor, and a detecting device for detecting a rotor movement after the stepping motor is driven. The electronic circuit includes a power source voltage detecting circuit and driving power controlling device which intermits driving pulses of the stepping motor according to an output of the voltage detecting circuit so that the driving force is substantially constant and the power consumption is decreased.

REFERENCES:
patent: 4107595 (1978-08-01), Campe
patent: 4140955 (1979-02-01), Drabing
patent: 4212156 (1980-07-01), Kawamura et al.
patent: 4214434 (1980-07-01), Sutter
patent: 4254491 (1981-03-01), Haub et al.
patent: 4272837 (1981-06-01), Ueda et al.
patent: 4295083 (1981-10-01), Leenhouts

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