Motor drive control circuit

Details Motor drive control circuit Motor drive control circuit

1984-12-06

1985-11-05

Perkey, William B.

G03B 118

Patent

active

045509921

ABSTRACT:
A motor drive control circuit for a camera comprises means for comparing a power supply voltage with a predetermined voltage; means for holding information obtained by the comparison; and a timer circuit which causes an output signal to be generated after the lapse of a predetermined period of time. With exception of the time at which the power supply to the motor is started, the power supply voltage obtained during the process of power supply to the motor is compared with the predetermined voltage. The information thus obtained is retained and various control operations are performed on the basis of the information retained.

REFERENCES:
patent: 4350422 (1982-09-01), Maida
patent: 4389111 (1983-06-01), Uchidoi et al.

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