Testing of live circuit boards

Details Testing of live circuit boards Testing of live circuit boards

1998-04-13

2000-09-26

Brown, Glenn W.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

324538, 324763, G01R 3102

Patent

active

061247154

ABSTRACT:
Apparatus and method for testing the components and interconnections of a circuit board while the circuit board is, normally, operatively connected in a system. The circuit board contains a plurality of integrated circuits with at least one of the integrated circuits including interface circuitry for interfacing the circuitry on the circuit board to the rest of the system. The circuit board includes testing circuitry for: (a) selectively testing the circuits contained on the circuit board, other than its interface circuits; and (b) selectively testing the interface circuits and their interconnections. The method of the invention includes placing the interface circuitry in a first state for isolating the circuitry on the circuit board from the rest of the system and testing the circuitry on the circuit board, other than the interface circuitry; and placing the interface circuitry in a second state and testing the interface circuitry and its interconnections.

REFERENCES:
patent: 5124660 (1992-06-01), Cilingiroglu
patent: 5399975 (1995-03-01), Laing et al.
patent: 5486753 (1996-01-01), Khazam et al.
patent: 5736862 (1998-04-01), Hamblin
patent: 5818251 (1998-10-01), Intrater

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