Highly stable frequency generator

Details Highly stable frequency generator Highly stable frequency generator

1995-10-18

1998-02-17

Roskoski, Bernard

Horology: time measuring systems or devices

Plural timepiece system or system device

With wireless synchronization

368202, G04C 1102, G04B 1720

Patent

active

057198276

ABSTRACT:
A highly stable frequency generator (G) comprises an oscillator (10) for generating a first frequency (F1), and
further comprises a time base (BT) providing a time stable frequency signal which is independent of the temperature, and a feedback circuit arranged to provide a first number of pulses (n.sub.T) coming from the oscillator (10) to a comparing circuit (13), a circuit (14) for providing a reference number of pulses (N.sub.T) to said comparing circuit (13), and a circuit (13,15,16) providing a correction signal (Sc) as a function of the difference (.DELTA.) between the first number (n.sub.T) and the reference number (N.sub.T), the generator (G) further comprising a correction circuit (17) of the oscillation frequency (F1) of said first oscillator (10), this correction circuit being controlled by said control signal (Sc).

REFERENCES:
patent: 4241435 (1980-12-01), Fujita et al.
patent: 4427302 (1984-01-01), Watanabe
patent: 4502790 (1985-03-01), Yokoyama
patent: 4537515 (1985-08-01), Dinger et al.
patent: 4761771 (1988-08-01), Moriya et al.
Proceedings of the 1992 IEEE International Conference on Industrial and Automation, 9-13 Nov., 1992, San Diego, USA vol. 3/3, pp. 1582-1587.

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