Electric timepiece incorporating rectifier and driving circuits

Details Electric timepiece incorporating rectifier and driving circuits Electric timepiece incorporating rectifier and driving circuits

1974-01-11

1976-01-27

Hix, L. T.

357 42, G04C 300

Patent

active

039343995

ABSTRACT:
A timepiece having a quartz crystal vibrator serving as a time standard, a digital display, and integrated divider and C-MOS transistor driving circuits for dividing the high frequency signal from the vibrator into low frequency timing signals for the direct driving of the liquid crystal display. A battery energizes the vibrator and divider circuits but the voltage thereof is insufficient for energizing the display driving circuits. Said voltage is stepped up by a circuit including a rectifier circuit monolithically integrated on the same substrate as said complementary coupled transistor integrated driving circuit and produces a voltage sufficient to energize the driving circuit.

REFERENCES:
patent: 3505804 (1970-04-01), Hofstein
patent: 3541357 (1970-11-01), Kram
patent: 3649887 (1972-03-01), Keller et al.
patent: 3668860 (1972-06-01), Diersbock
patent: 3712995 (1973-01-01), Steudel
patent: 3757510 (1973-09-01), Dill
patent: 3818484 (1974-06-01), Nakamura et al.
RCA, COS/MOS Integrated Circuits Manual, pp. 24-26, 1971.

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