D.C. voltage ratio measuring circuit

Details D.C. voltage ratio measuring circuit D.C. voltage ratio measuring circuit

1974-09-27

1976-04-20

Rolinec, R. V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

328161, G01R 704, G06G 716

Patent

active

039522482

ABSTRACT:
A circuit sensitive to the ratio of the values of two voltages of fixed polarities and possibly variable magnitudes, including two identical voltage dividers respectively fed from one and the other of said voltages and a third divider fed from a constant amplitude alternative voltage source. Each divider consists of a constant resistance and of a variable voltage sensitive resistance. The relative positions of the constant and variable resistances are the same in the two first dividers and are reversed in the third one; the latter is biassed by a voltage derived from at least one of the voltages to be compared. From the voltages received at the mid-points of the two first dividers, a resulting voltage is derived, the value of which has a simple relation to the ratio of the compared voltages.

REFERENCES:
patent: 2521522 (1950-09-01), Keitley
patent: 3710253 (1973-01-01), O'Neill

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