Motor drive circuit in digital type electronic time piece

Details Motor drive circuit in digital type electronic time piece Motor drive circuit in digital type electronic time piece

1978-06-27

1980-11-25

Truhe, J. V.

Horology: time measuring systems or devices

Pulse transforming means

With transistor

318696, G04C 300, G05B 1940

Patent

active

042350727

ABSTRACT:
The electric motor in a digital time piece is driven in accordance with a pulse width modulated signal by supplying the signal first to a logic circuit together with the output signal from a switch which is periodically opened and closed as the motor rotates. Application of a pulse to the logic circuit begins motor rotation which does not stop until the switch is tripped.

REFERENCES:
patent: 3466520 (1969-09-01), Aylikci et al.
patent: 3919611 (1975-11-01), Takahashi et al.
patent: 3971204 (1976-07-01), Kawaguchi et al.
patent: 4129816 (1978-12-01), Feldy et al.

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