Electricity: measuring and testing – Plural – automatically sequential tests
Patent
1978-07-31
1980-09-02
Strecker, Gerard R.
Electricity: measuring and testing
Plural, automatically sequential tests
324 51, G01R 3102, G01R 3122
Patent
active
042209170
ABSTRACT:
This specification deals with testing of a network of electrical interconnections between chips mounted on an insulative substrate of a module and between the chips and the input and output pins of the module. Each of the mounted chips contains masking circuits which can be activated to prevent controlling signals from the outputs of logic circuits on the chip from being transmitted off the chip and into the interconnection network. Also each of the chips contains emitter follower circuits that logically connect all the chip input terminals to a common output terminal of the chip. In testing the mask circuits are activated. Then potential levels are selectively applied to a plurality of test points in the interconnection network and differences in potential level between these test points and/or between the points and one or more of the common terminals are determined.
REFERENCES:
patent: 3746973 (1973-07-01), McMahon
patent: 3781683 (1973-12-01), Freed
patent: 3789205 (1974-01-01), James
patent: 3803483 (1974-04-01), McMahon
patent: 3815025 (1974-06-01), Jordan
patent: 4055754 (1977-10-01), Chesley
patent: 4140967 (1979-02-01), Balasubramanian et al.
International Business Machines - Corporation
Murray James E.
Strecker Gerard R.
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