Piezo electric resonator temperature sensor

Details Piezo electric resonator temperature sensor Piezo electric resonator temperature sensor

1991-05-28

1992-09-22

Cuchlinski, Jr., William A.

Thermal measuring and testing

Temperature measurement

By a vibratory effect

374163, 310311, 310371, 331 66, 331163, 73579, G01K 1122

Patent

active

051491974

ABSTRACT:
The temperature of a quartz crystal oscillator is determined by comparison of a pair of inharmonically related overtone oxcillations of the same vibrational type, e.g. a thickness shear mode, and of the same overtone order. The use of inharmonically related signals relaxes the contraints on crystal design. The technique may be employed in a crystal controlled frequency synthesizer to provide a feedback signal for maintaining constant output frequency.

REFERENCES:
patent: 4468634 (1984-08-01), Takagi et al.
patent: 4472656 (1984-09-01), Franx
patent: 4481488 (1984-11-01), Dworsky
patent: 4537515 (1985-08-01), Dinger et al.
patent: 4558248 (1985-12-01), Valentin
patent: 4625138 (1986-11-01), Ballato
patent: 4628285 (1986-12-01), Nakatani et al.
patent: 4872765 (1989-10-01), Schodowski
patent: 4939403 (1990-07-01), Kittaka et al.

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