Constant frequency signal generator circuit and method

Details Constant frequency signal generator circuit and method Constant frequency signal generator circuit and method

1986-03-03

1987-09-08

LaRoche, Eugene R.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural oscillators controlled

331175, H03L 706

Patent

active

046927158

ABSTRACT:
An improved apparatus for generating a stable frequency signal is disclosed. A master oscillator provides an output signal having a preselected frequency value X. A main feedback loop, a first feedback loop and a second feedback loop are provided. Deviation of the output signal from the preselected frequency value X causes the second feedback loop to be responsive at twice the frequency rate as that of the first feedback loop. The frequency difference between the values of the first feedback loop and the second feedback loop is used to produce a control signal for the main feedback loop used to control the frequency value X of the output signal. The circuit is self-correcting and exhibits high order short and long term stability. Two embodiments are disclosed.

REFERENCES:
patent: 4227158 (1980-10-01), Schroeder et al.

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