Time of day clock

Details Time of day clock Time of day clock

1987-05-27

1987-11-24

Miska, Vit W.

Horology: time measuring systems or devices

Electrical time base

Solid state oscillating circuit type

368200, G04C 1308

Patent

active

047084910

ABSTRACT:
A fundamental interval of time is derived from a clock signal of an inherent frequency emanating from an untrimmed crystal oscillator. Firmware and hardware of the time-of-day clock system are used to control and modify the time interval between interrupt signals generated upon the occurrence of a specified count of clock cycles of the clock signals emanating from the crystal oscillator.

REFERENCES:
patent: 4282595 (1981-08-01), Lowdenslager et al.
patent: 4400093 (1983-08-01), Jaunin
patent: 4407589 (1983-10-01), Davidson et al.
patent: 4513259 (1985-04-01), Frerking

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