Solid state clock

Details Solid state clock Solid state clock

1978-08-21

1980-07-15

Truhe, J. V.

Horology: time measuring systems or devices

Chronological

With pulse transforming means

368218, G04C 300

Patent

active

042121574

ABSTRACT:
A solid state clock for an automobile or the like, which includes display means in the form of a vacuum fluorescent display. Current is supplied from the automobile battery to the display through an integrated circuit or "chip". The voltage from the battery is doubled by an inductor coil coupled between the battery and the integrated circuit. An electrical switching means in the form of a transistor is coupled between the integrated circuit and the inductor coil for supplying converted frequency thereto. A second switching transistor and a Zener diode is provided to regulate the duty cycle of the first transistor to maintain the voltage to the display substantially constant.

REFERENCES:
Newton on Switching Regulator Drives IC's and Nixies off Batteries, "Electronics" Jul. 6, 1970 p. 77.

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