Controllable frequency, temperature compensated piezo-...

Details Controllable frequency, temperature compensated piezo-... Controllable frequency, temperature compensated piezo-...

H - Electricity

03

L

331/36, 331/52

H03L 1/02 (2006.01) H03B 5/04 (2006.01) H03B 5/32 (2006.01)

Patent

CA 1302524

ABSTRACT OF THE DISCLOSURE A temperature-compensated piezoelectric oscillator of high-spectral purity, capable of being controlled in frequency, consists of a compensation circuit, a processing circuit, a phase-shifting circuit, containing the piezoelectric resonator, and an oscillating circuit. To obtain high spectral purity, it is proposed to use a low-pass filter, placed between the compensation circuit and one of the inputs of the processing circuits, to process the signal coming from the compensation circuit. This filter eliminates the influence of the temperature noise coming from the compensation circuit. The invention can be applied to controllable frequency, temperature compensated piezoelectric oscillators where high spectral purity is sought.

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