Leap year compensation circuit

Details Leap year compensation circuit Leap year compensation circuit

1983-09-28

1984-05-08

Roskoski, Bernard

Horology: time measuring systems or devices

With calendar indicator

Setting or resetting

368 28, G04B 1924, G04B 2700

Patent

active

044471602

ABSTRACT:
This invention provides a leap year compensation circuit. Date data from an electronic watch circuit is compared with leap year data from a memory circuit. If this date data represents a leap year, the next day after the end of February is corrected to a date in a leap year calender. Leap year compensated date data is set in the watch circuit.

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IBM Technical Disclosure Bulletin, vol. 18, No. 8, Jan. 1976, pp. 2515,16 E. Ying "Microprocessor for a Perpetual Calendar Display".
Horological Journal, vol. 116, No. 4, Oct. 1973, pp. 3 to 10, J. F. K. Nosworthy "The Cranleigh School Quartz-Crystal . . . Calendar".
Wireless World, vol. 80, No. 1468, Dec. 1974, pp. 491-495 "A Digital Clock and Calendar".
10e Congres International de Chronometrie, No. 3, Sep., 1979, Conference No. E2.1, pp. 271-278, C. Piguet et al.: "Conception d'un Microprocesseur Horloger".

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