Clock apparatus for forming time information for use in computer

Details Clock apparatus for forming time information for use in computer Clock apparatus for forming time information for use in computer

1994-12-19

1996-08-13

Roskoski, Bernard

Horology: time measuring systems or devices

Regulating means

For adjusting the frequency or beat

368202, G04B 1712

Patent

active

055463630

ABSTRACT:
A commercially available clock IC which is easily influenced by a temperature change or the like is used as it is, thereby easily allowing the clock IC to function as a high precision clock IC. A high precision oscillator is provided separately from a clock circuit as a clock IC. On the basis of a clock signal from the high precision oscillator, a predetermined time, for example, one minute is measured by a high precision clock control circuit. A correction signal is transmitted to the clock circuit as a clock IC from a high precision control circuit every measurement of such a predetermined time, thereby allowing the correcting operation of the time information to be executed. The clock circuit is, consequently, made operative at a precision of the high precision oscillating circuit.

REFERENCES:
patent: 4443116 (1984-04-01), Yoshida et al.
patent: 4513259 (1985-04-01), Frerking
patent: 4737944 (1988-04-01), Inoue et al.
patent: 5412624 (1995-05-01), Yocum

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