Apparatus for testing input pin leakage current of a device unde

Details Apparatus for testing input pin leakage current of a device unde Apparatus for testing input pin leakage current of a device unde

1987-10-30

1989-08-29

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Plural, automatically sequential tests

324158R, G01R 3100, G01R 1512

Patent

active

048620700

ABSTRACT:
Apparatus for testing leakage currents of input pins of an electronic device under test including a connector having a plurality of contacts for making electrical contact to respective input pins, a plurality of current measuring circuits connected to respective contacts of the connector for sensing leakage currents and providing analog outputs indicating current, a multiplexer connected to receive the analog outputs and selectively provide one analog output as a multiplexer output, and an analog-to-digital converter connected to receive the multiplexer output and provide a digital output indicating leakage current. Also disclosed are storing a limit value for each pin in a limit memory and comparing the limit values with the multiplexer outputs; using a plurality of digital-to-analog converters to selectively provide desired inputs to the input pins; and using a correction memory storing a correction value for each pin to correct the multiplexer output.

REFERENCES:
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patent: 4651088 (1987-03-01), Sawada
patent: 4710927 (1987-12-01), Miller
patent: 4724379 (1988-02-01), Hoffman
patent: 4739252 (1988-04-01), Malaviya et al.

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