Electrical continuity test apparatus having a forward biased dio

Details Electrical continuity test apparatus having a forward biased dio Electrical continuity test apparatus having a forward biased dio

1976-06-03

1978-05-09

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 3102

Patent

active

040889475

ABSTRACT:
Electrical continuity between two points is measured by electrically connecting a diode between the two points. A dc voltage is applied across the diode, with the positive voltage being connected to the anode of the diode and the negative voltage being connected to the cathode. The largest voltage which appears across the two measurement points is equal to the voltage drop across the diode. An operational amplifier senses and amplifies the voltage appearing between the two measurement points. If this voltage exceeds a certain maximum value, a light emitting diode is turned on to indicate that there is no continuity between the measurement points.

REFERENCES:
patent: 2645754 (1953-07-01), Pitinsky
patent: 2699528 (1955-01-01), Periale
patent: 3339578 (1967-09-01), Smith
patent: 3345565 (1967-10-01), Cotter
patent: 3525038 (1970-08-01), Felt et al.
patent: 3590370 (1971-06-01), Fleischer
patent: 3783372 (1974-01-01), Boyd
patent: 3829849 (1974-08-01), Stauffer
patent: 3845388 (1974-10-01), Ley et al.
Cann, G. W., Continuity Tester, IBM Tech. Discl. Bulletin, vol. 7, No. 12, May, 1965.

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