Failure monitor for crystal filters

Details Failure monitor for crystal filters Failure monitor for crystal filters

1979-06-18

1981-08-18

Tokar, Michael J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324DIG1, 324 62, G01R 2922

Patent

active

042849462

ABSTRACT:
A comparator has one input terminal connected to a reference voltage terminal and a second input terminal connected to sense the voltage on the resonator structure of a crystal filter. In the event the voltage on the resonator structure changes, such as by failure of the ground connection, the comparator generates an output signal indicating crystal filter failure.

REFERENCES:
patent: 3568044 (1971-03-01), Elazar
patent: 3588690 (1971-06-01), Griffin
patent: 3786350 (1974-01-01), Munt

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