Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Patent
1995-02-24
1997-03-04
Wieder, Kenneth A.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
3241581, 324765, G01R 3100, G01R 3126
Patent
active
056083297
ABSTRACT:
A circuit test device for carrying out a DC Test and a Function Test on a test object without using a relay, wherein a first differential circuit receives a signal from a test object; a current source supplies a current to the test object; a second differential circuit receives an output from the first differential circuit and supplies a current to the test object; a current measuring circuit measures the current flowing through the second differential circuit; and a control circuit controls the current source and the current in the second differential circuit while applying a voltage to the first differential circuit and provides a set voltage to the first differential circuit for the test object when carrying out the DC Test, and provides a set current in the second differential circuit when carrying out the Function Test.
REFERENCES:
patent: 4408128 (1983-10-01), Fujita
patent: 4706015 (1987-11-01), Chen
patent: 4733173 (1988-03-01), Bach et al.
patent: 4998026 (1991-03-01), King
patent: 5552712 (1996-09-01), Weir et al.
Brown Glenn W.
Kojima Moonray
Wieder Kenneth A.
Yokogawa Electric Corporation
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