Transimpedance oscillator having high gain amplifier

Details Transimpedance oscillator having high gain amplifier Transimpedance oscillator having high gain amplifier

1980-03-07

1982-11-09

Grimm, Siegfried H.

Oscillators

Electromechanical resonator

Crystal

331108D, H03B 532

Patent

active

043587429

ABSTRACT:
A transimpedance amplifier is connected in a positive regenerative loop with a crystal resonator. The transimpedance amplifier includes a high gain amplifier with a parallel resistor and capacitor thereacross. A virtual ground is created at the node between the resonator and the amplifier input thereby eliminating circuit sensitivity to inherent capacitive changes between the resonator and true ground. Components are chosen to maintain oscillations at series resonance and achieve insensitivity to changes in the motional resistance of the resonator.

REFERENCES:
patent: 2303862 (1942-12-01), Peterson
patent: 2985845 (1961-05-01), Anderson et al.
patent: 3731230 (1973-05-01), Cerny, Jr.
patent: 3767946 (1973-10-01), Berger et al.

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