Voltage measuring device for a source with unknown resistance

Details Voltage measuring device for a source with unknown resistance Voltage measuring device for a source with unknown resistance

1996-12-11

1998-11-03

Ballato, Josie

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

324115, 324430, G01R 700

Patent

active

058314270

ABSTRACT:
A volt meter changes the dividing resistance across the terminals of a voltage source between first and second different resistances and measures voltage across the dividing resistor at the different resistances to determine an accurate voltage source magnitude from the measured voltages and the ratio of second to first resistances despite an unknown source resistance.

REFERENCES:
patent: 3786350 (1974-01-01), Munt
patent: 4213088 (1980-07-01), Nossen
patent: 4864224 (1989-09-01), Roppelt et al.
patent: 5256979 (1993-10-01), Moorman
patent: 5469071 (1995-11-01), Obata
Circuits, Devices, and Systems, A First Course in Electrical Engineering, Second Edition, pp. 656-657, Ralph J. Smith (1971; month unavailable).
Low Level Measurements, 4th Edition, Section 1, pp. 1-3 & 1-4; Section 3, pp. 3-6 & 3-7. (Date unavailable).

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