Controlled hybrid microcircuit oscillator

Details Controlled hybrid microcircuit oscillator Controlled hybrid microcircuit oscillator

1983-09-01

1985-12-17

LaRoche, Eugene R.

Oscillators

Amplitude control or stabilization

Automatic

328175, 73304C, 324 61R, H03L 500

Patent

active

045595070

ABSTRACT:
An AC signal source having constant frequency-amplitude product is also easily realizable in hybrid microcircuit form. A square wave oscillator output is rectified and clamped to a feedback control voltage. The resulting controlled amplitude square wave is low-pass filtered to produce a sinusoidal output signal which is typically amplified and applied to a variable-impedance load. The sinusoidal signal is also applied to a similar but simulated load of fixed impedance value and the current flowing through the simulated load is summed with a temperature-compensated reference current producing an error current which is then integrated to produce the feedback control voltage which controls the amplitude of the sinusoidal signal so as to maintain a constant frequency amplitude product.

REFERENCES:
patent: 3187269 (1965-06-01), Runyan
patent: 3533286 (1970-10-01), Westcott et al.
patent: 3580074 (1971-05-01), Westcott
patent: 3901079 (1975-08-01), Vogel
patent: 4086528 (1978-04-01), Walton
patent: 4259865 (1981-04-01), Myers

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