Test set for measuring impedance and power dissipation of a crys

Details Test set for measuring impedance and power dissipation of a crys Test set for measuring impedance and power dissipation of a crys

1975-09-22

1977-01-04

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 57R, G01R 2922, G01R 2700

Patent

active

040016757

ABSTRACT:
A crystal test set comprising an oscillator circuit in which a crystal under test is an integral part. The resistor substitution technique is employed in which the crystal and a variable resistor are alternately connected into the oscillator circuit. With the resistor in the circuit, the circuit is tuned to the resonance frequency of the crystal. The value of the resistor is adjusted to produce a voltage across the resistor equal to the voltage across the crystal. The adjusted value of the resistor is measured and corresponds to the crystal impedance. A measuring circuit, responsive to the voltage drop across the crystal, provides a direct measure of the crystal power dissipation.

REFERENCES:
patent: 2919398 (1959-12-01), Guttwein et al.
patent: 2931976 (1960-04-01), Gougoulis
patent: 3832631 (1974-08-01), Koga et al.
patent: 3840804 (1974-10-01), Sauerland

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