Crystal resonator oscillator having circuitry for suppressing un

Details Crystal resonator oscillator having circuitry for suppressing un Crystal resonator oscillator having circuitry for suppressing un

1984-02-06

1986-03-04

LaRoche, Eugene R.

Oscillators

Solid state active element oscillator

Transistors

331160, 331117R, H03B 536

Patent

active

045742570

ABSTRACT:
Oscillator circuit comprising an amplifier arrangement being connected to a reference level an output and an input thereof being coupled via a single signal-carrying terminal to a resonant network which is connected to the same reference level as the amplifier arrangement, the resonant network comprising a crystal resonator. A stable oscillation at a higher order crystal resonant frequency is provided by means of an LC-network which selects said higher order crystal resonant frequency and a resistor connected in parallel across the crystal resonator, which prevents parasitic oscillations at the resonant frequency determined by the components of the LC-network and the case or holder capacitance of the crystal resonator.

REFERENCES:
patent: 3199052 (1965-08-01), Verstraelen
patent: 4193046 (1980-03-01), Chiba

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