Circuit test apparatus

Details Circuit test apparatus Circuit test apparatus

1977-08-24

1978-12-12

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 64, 324DIG1, G01R 2700

Patent

active

041298268

ABSTRACT:
A fixed amplitude test waveform is concurrently applied to a reference circuit and a circuit under test that is supposed to be substantially identical to the reference circuit. The waveform comprises a composite signal whose frequency varies through a range of values during each period and is produced by a generator whose effective impedance also varies in accordance with the variation in frequency. The voltages developed at the test points of the reference and test circuits are compared and the difference between them, which is a measure of an undesired condition of the test circuit, is displayed.

REFERENCES:
patent: 2870430 (1959-01-01), Hancock
patent: 2951200 (1960-08-01), Critchlow
patent: 2991436 (1961-07-01), Banton
patent: 3457507 (1969-07-01), Overtveld
patent: 3464007 (1969-08-01), Williams

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