Accession Number : ADD011588

Title :   Adjustment of the Frequency-Temperature Characteristics of Crystal Oscillators.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Ballato,A

Report Date : 28 Feb 1985

Pagination or Media Count : 18

Abstract : The patent application relates generally to temperature compensated crystal oscillators utilizing piezoelectric resonators and more particularly to the alteration of the frequency-temperature characteristic of a piezoelectric resonator of a temperature compensated crystal oscillator. The frequency-temperature piezoelectric resonator in a temperature compensated crystal oscillator is adjusted by the inclusion of an equivalent inductive reactance connected 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 variation in the temperature with a conventional capacitor in series with the piezoelectric resonator.

Descriptors :   *PATENT APPLICATIONS, *CRYSTAL OSCILLATORS, INDUCTANCE, ELECTRIC BRIDGES, CAPACITORS, FREQUENCY, TEMPERATURE, CIRCUITS, PIEZOELECTRIC MATERIALS, RESONATORS

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE