Electronic circuit testing apparatus

Details Electronic circuit testing apparatus Electronic circuit testing apparatus

1975-05-28

1977-01-04

Rolinec, R. V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324 51, 324 52, 324133, G01R 3102, G01R 3108

Patent

active

040016862

ABSTRACT:
A failing component connected to a node on a circuit board is located by applying voltage probes to the printed circuit lands connected to the node to determine the direction and magnitude of current flow. By determining the direction and magnitude of current flow to or from each of the components, a reliable determination can be made of the failing circuit component. The direction and magnitude of current flow is determined by use of a polarity indicator which includes a differential chopper amplifier, a high Q, high gain, active filter and digital gating circuitry.

REFERENCES:
patent: 1446995 (1923-02-01), Sines
patent: 2114298 (1938-04-01), Gunn
patent: 2133670 (1938-10-01), Schuchmann
patent: 3619775 (1971-11-01), Naylor et al.

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