Board test apparatus and method for fast capacitance measurement

Details Board test apparatus and method for fast capacitance measurement Board test apparatus and method for fast capacitance measurement

1996-12-19

1998-12-01

Ballato, Josie

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

324765, 324523, 702 65, G01R 2726

Patent

active

058444122

ABSTRACT:
A printed circuit board tester incorporating hardware for fast capacitive measurements. The circuit board tester includes a digital signal processor that can both source and measure test signals. It also includes an amplifier having an input and an output connected to probes that can contact points on the printed circuit board. In use, the board tester is configured to place a capacitor on the printed circuit board under test in the feedback path of the amplifier. The digital signal processor generates a stimulus signal to the capcitor and the output of the amplifier is passed to the digital signal processor. The digital signal processor uses an adaptive filtering approach to determine convergence of the measurement, thereby minimizing measurement time. The arrangement is flexible and can be reconfigured to measure both large and small values of capacitance.

REFERENCES:
patent: 4196475 (1980-04-01), Hall
patent: 4795966 (1989-01-01), Cook
patent: 5101106 (1992-03-01), Cox, Jr. et al.
patent: 5212454 (1993-05-01), Proebsting
patent: 5450014 (1995-09-01), Lee
patent: 5469364 (1995-11-01), Hughey et al.
patent: 5579236 (1996-11-01), Tamamura et al.

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