Step motor control mechanism for electronic timepiece

Details Step motor control mechanism for electronic timepiece Step motor control mechanism for electronic timepiece

1990-10-01

1991-08-06

Miska, Vit W.

Horology: time measuring systems or devices

Electrical time base

Solid state oscillating circuit type

368160, G04F 500

Patent

active

050383299

ABSTRACT:
A step motor driving control mechanism for use in an electronic timepiece for reducing the current consumption thereof is provided. Load detection circuitry detects the load condition of the step motor and selectively produces a load condition signal representative of a predetermined load condition thereof. Driving and control circuitry is provided for receiving a low frequency timekeeping signal produced by a divider circuit and a load detection signal when same is selectively produced by the load detection circuitry. In response to the presence or absence of a load detection signal applied thereto, the drive and control circuitry is adapted to vary the duration of the pulse width of a drive signal applied to the step motor to effect a driving of same.

REFERENCES:
patent: 3855781 (1974-12-01), Chihara et al.
patent: 4032827 (1977-06-01), Dobratz et al.
patent: 4114364 (1978-09-01), Takahashi
patent: 4212156 (1980-07-01), Kawamura et al.

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