Multiple bandwidth crystal controlled oscillator

Oscillators – Electromechanical resonator – Crystal

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331116FE, H03B 532

Patent

active

048961221

ABSTRACT:
A dual bandwidth crystal controlled oscillator is described having a first transconductance amplifier providing sufficient gain to maintain oscillation with an oscillator crystal at a minimum current drain. A second transconductance amplifier is provided which can be selectively coupled to the first transconductance amplifier, thereby augmenting the gain of the first transconductance amplifier to provide the capability for rapid oscillator start-up following battery saver operation. The dual bandwidth crystal controlled oscillator can be utilized in conventional oscillator and frequency synthesizer applications.

REFERENCES:
patent: 3676801 (1972-07-01), Musa
patent: 4282496 (1981-08-01), Heuner
patent: 4321562 (1982-03-01), Igarashi
patent: 4370625 (1983-01-01), Someshwar
patent: 4387350 (1983-06-01), Bessolo et al.

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