D-C Voltage converter for a wristwatch

Details D-C Voltage converter for a wristwatch D-C Voltage converter for a wristwatch

1980-09-09

1983-02-01

Reynolds, B. A.

Horology: time measuring systems or devices

Power supply details

Electrical

368204, 368 66, 368219, 363 25, 320 2, G04C 1004

Patent

active

043712690

ABSTRACT:
A d-c converter for inclusion in a miniature electronic device, such as an electronic wristwatch having a d-c supply source, the converter functioning to increase or decrease the voltage of this source. The converter includes a transformer whose primary is connected to the source through a periodically-actuated chopper to produce an alternating voltage, the secondary of the transformer being connected to a rectifier circuit having at least one controllable switch element whose on-off state is governed in synchronism with the chopper whereby the switch element acts to rectify the secondary voltage.

REFERENCES:
patent: 3701937 (1972-10-01), Combs
patent: 3859586 (1975-01-01), Wadlington
patent: 4134057 (1979-01-01), Portmann
patent: 4291266 (1981-09-01), Portmann
IBM Technical Disclosure Bulletin, "Synchronous Switching Regulator", Milewski, vol. 20, No. 11A, Apr. 1978.
IBM Technical Disclosure Bulletin, "Transistor Rectifier-Regulator", Gillett, vol. 22, No. 6, Nov. 1979.
Rosler, "Step-Motor Switching Regulator with VMOS Transistors", Elektronik, vol. 28, No. 7, Apr. 1979.

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