Coherent switching power for an analog circuit tester

Details Coherent switching power for an analog circuit tester Coherent switching power for an analog circuit tester

1997-04-29

1999-03-16

Ballato, Josie

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

324537, G01R 3126

Patent

active

058835237

ABSTRACT:
A circuit tester stimulates an analog circuit device under test (DUT) with a test signal and periodically digitizes a resulting DUT output signal to produce an output data sequence that may be analyzed to ascertain DUT operating characteristics. The tester is powered by a switching power supply that induces periodic noise spikes in the DUT output signal. To eliminate the influence of the noise spikes on test results, the period of the switching power supply noise is made coherent with the digitization period. The phase of digitization is then adjusted so that the tester avoids digitizing the noise spikes in the DUT output signal.

REFERENCES:
patent: 4290313 (1981-09-01), Appel et al.
Horowitz, Paul and Hill, Winfield, The Art of Electronics, 2nd Edition, Cambridge University Press, 1989, pp. 360-368 (Month Unavailable).

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