Closed loop temperature compensated frequency reference

Details Closed loop temperature compensated frequency reference Closed loop temperature compensated frequency reference

1982-12-23

1985-04-23

LaRoche, Eugene R.

Oscillators

Frequency stabilization

Temperature or current responsive means in circuit

331 66, 331 47, 368202, H03L 100

Patent

active

045132593

ABSTRACT:
A closed loop frequency source includes a controllable oscillator that provides a first frequency source, a reference oscillator that provides a second signal, and a comparator that compares the two frequencies to provide an error signal that represents the difference between the frequencies. The error signal is used by an error signal generator to generate a compensation signal which offsets the carrier frequency that drives an output device such as a time-of-day clock so that the output device automatically gains or loses the previously accumulated time error without the necessity of being periodically updated.

REFERENCES:
patent: 3713033 (1973-01-01), Frerking
patent: 3719838 (1973-03-01), Peduto et al.
patent: 4297657 (1981-10-01), Frerking
patent: 4305041 (1981-12-01), Frerking
patent: 4380745 (1983-04-01), Barlow et al.
patent: 4454483 (1984-06-01), Baylor

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