Integrated circuit device for clock

Details Integrated circuit device for clock Integrated circuit device for clock

1980-02-25

1982-07-27

Smith, Jerry

Boots, shoes, and leggings

364705, G06F 1520

Patent

active

043420923

ABSTRACT:
A clock integrated circuit comprises an oscillator circuit for producing a basic frequency signal, a frequency divider for frequency dividing the basic frequency signal to a predetermined frequency, a time measuring circuit for counting output pulses from the frequency divider to produce time data consisting of 1-second, 10-seconds, 1-minute, 10-minutes, 1-hour and 10-hours digits or a combination of some of these digits and a display driver circuit for displaying the time data on an external display means. Further, it comprises a digit selection circuit which outputs the afore-said time data such that the time data can be directly coupled to a central processing element.

REFERENCES:
patent: 3967098 (1976-06-01), Harnagel et al.
patent: 4035627 (1977-07-01), Dickinson et al.
patent: 4065663 (1977-12-01), Edwards
patent: 4158285 (1979-06-01), Heinsen et al.
patent: 4192130 (1980-03-01), Takeuchi

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