Excavating
Patent
1988-02-29
1990-03-06
Fleming, Michael R.
Excavating
371 683, G01R 3128
Patent
active
049072307
ABSTRACT:
Apparatus and method for testing electrical circuits, especially printed circuit boards containing a number of integrated circuit components. Access to the component to be tested is by means of a clip with driver/sensor pins having field effect transistor circuitry. Each pin corresponds to an access point on the device under test, and each pin includes its own circuitry for driving the inputs and sensing the outputs of both analog and digital components. The test instrumentation is integrated with a host microcomputer, eliminating the need for "memory behind the pins". Test programming directs the test instrumentation to perform functional testing while the components are in circuit and to test for in-circuit component parameters. The invention provides automatic test generation, including means for learning the characteristics of known good components and boards. The invention also provides expert system programming for recording and analyzing test results data and for using this data to generate faster tests.
REFERENCES:
patent: 4713815 (1987-12-01), Bryan
patent: 4728883 (1988-03-01), Green
patent: 4761607 (1988-08-01), Shiragasawa
patent: 4771428 (1988-09-01), Acuff
patent: 4794599 (1988-12-01), Purcell
patent: 4810958 (1989-03-01), Mogi
Heller Rik
Krigel Henrick Y.
Fleming Michael R.
Livingston Ann C.
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