System for detecting open circuits with a measurement device

Details System for detecting open circuits with a measurement device System for detecting open circuits with a measurement device

1997-10-31

1999-08-24

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

340660, 324500, 324523, 324527, G08B 2100

Patent

active

059429828

ABSTRACT:
A system for detecting open circuits is presented. The system comprises first and second digital-to-analog converters (DACs). The DACs, in combination with a microprocessor, generate a tri-state voltage which is fed through the system. This tri-state voltage is then attenuated via an amplifier. A probe carries an external attenuation signal via a measurement line through the system to be summed with the attenuated tri-state voltage to create V.sub.wts. An analog-to-digital converter then compares V.sub.wts with a known signal to determine whether the circuit under test is open.

REFERENCES:
patent: 3590370 (1971-06-01), Fleischer
patent: 5754114 (1998-05-01), Gnadt

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