Computer controlled measurement and switching circuit for cable

Details Computer controlled measurement and switching circuit for cable Computer controlled measurement and switching circuit for cable

1991-04-25

1993-08-17

Snow, Walter E.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

324 66, G01R 3102

Patent

active

052372820

ABSTRACT:
A control circuit for a cable tester having a computer interface and a cable adaptor. The latter comprises a current source having inputs from the computer interface and outputs to a first group of solid state switches having inputs from the current source and the computer interface and having outputs to an input of the cable adapter; a second group of solid state switches having inputs from the first group of solid state switches and the computer interface and having outputs to a first amplifier; and a third group of solid state switches having inputs from a fourth group of solid state switches and the computer interface and having outputs to the first amplifier. The fourth group of switches has inputs from an output of the cable adapter and the computer interface and has an output to ground, and the first amplifier has an output to the computer interface. When a cable having a conductor therein is connected to the cable adaptor, the computer interface is operative to selectively activate the current source and close each of the related switches in the first, second, third and fourth groups of solid state switches thereby causing a current to flow through a selected conductor in the cable under test and hence providing the computer interface with an output from the first amplifier.

REFERENCES:
patent: 2962659 (1960-11-01), Neill
patent: 3430135 (1969-02-01), Mullen
patent: 3678379 (1972-07-01), Arvay et al.
patent: 4901003 (1990-02-01), Clegg

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