Frequency temperature characteristics of crystal

H - Electricity – 03 – L

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331/53

H03L 1/00 (2006.01) H03B 5/32 (2006.01) H03L 1/02 (2006.01)

Patent

CA 1281387

Abstract of the Disclosure The frequency-temperature characteristic of the piezoelectric resonator in a temperature compensated crystal oscillator is adjusted by the inclusion of an equivalent inductive reactance connected in series with a piezoelectric crystal resonator coupled to an oscillator circuit, with the equivalent inductive reactance being realized in the form of an inductorless Maxwell type bridge circuit containing the resonator. Such an arrangement provides a much larger varia- tion in the temperature-frequency characteristic than can be realized with a conventional capacitor in series with the piezoelectric resonator.

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