High current test signal converter circuit

Details High current test signal converter circuit High current test signal converter circuit

1994-09-21

1996-01-02

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

327561, H03L 500

Patent

active

054812178

ABSTRACT:
An interface circuit for converting high current output signals provided by a test equipment to corresponding low voltage signals for testing digital relays used in power transmission systems. The high current signal outputs range in value between 0.001 and 26 amperes. The interface circuit includes a current sensing resistor for converting the high current output signal provided by the test equipment to a low voltage signal. The low voltage signal is amplified to the appropriate voltage level to correspond to the test equipment current signal output. The gain of the amplifier is adjustable using a potentiometer to allow the interface circuit to be used with different digital relays having different input signal requirements.

REFERENCES:
patent: 4132954 (1979-01-01), Sidhu
patent: 4804910 (1989-02-01), Russell
patent: 5270898 (1993-12-01), Elms et al.
Sedra & Smith, Microelectronic Circuits, Saunders College Publishing, Philadelphia 1991.

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