Step motor control device and electronic timepiece equipped...

Details Step motor control device and electronic timepiece equipped... Step motor control device and electronic timepiece equipped...

2005-09-20

2005-09-20

Leykin, Rita (Department: 2837)

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

C318S696000, C368S217000, C368S218000, C368S219000, C368S188000

Reexamination Certificate

active

06946813

ABSTRACT:
A step motor control device detects a rotational driving state of a step motor. In a first detection period immediately after termination of the rotational driving state of the step motor, selected switch elements are controlled so that a first detection signal is obtained. If the step motor is not in a rotational driving state, the first detection signal is suppressed to a low voltage that is equal to or lower than a threshold value. In a second detection period immediately after lapse of the first detection period, selected switch elements are controlled so that a second detection signal of high and stable voltage is obtained in accordance with the rotational driving state of the step motor.

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