Crystal controlled oscillator

Details Crystal controlled oscillator Crystal controlled oscillator

1986-04-03

1987-02-24

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331158, 331177R, H03B 536

Patent

active

046460330

ABSTRACT:
A VCO including an oscillation sustaining feedback loop for maintaining the phase shift between the output and the input of a first amplifier to sustain oscillations. A diversion gate coupled with the input of the first amplifier causes the frequency of oscillation to be adjusted by introducing a phase shift within the feedback loop to thereby force the resonant frequency of a crystal connected to the input of the first amplifier to change accordingly. The feedback loop comprises a first integrator connected to the output of the first amplifier, a second amplifier having an input coupled to the output of the first amplifier and an output coupled to the input of the first amplifier and a second integrator connected to the output of the second amplifier with the output of the diversion gate being connected to the output of the second amplifier.

REFERENCES:
patent: 4571558 (1986-02-01), Gay et al.

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