Voltage detection

Details Voltage detection Voltage detection

1989-12-06

1991-07-23

Wieder, Kenneth A.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Modulator/demodulator

307350, 324120, G01R 1900

Patent

active

050346814

ABSTRACT:
A circuit arrangement for detecting an input voltage comprises an oscillator responsive to the voltage, the oscillator including a pair of transistors (8, 9) connected as an astable multivibrator, each of the transistors having a load which comprises a primary winding (16 or 17) of a current transformer (T) and a low resistance proof resistor (12 or 13). A current flows through a secondary winding (18) of the transformer the amplitude of which current is proportional to the input voltage.

REFERENCES:
patent: 3679975 (1922-07-01), Fein
patent: 3896366 (1975-07-01), Onogi
patent: 3996506 (1976-12-01), Kichak
patent: 4374346 (1983-02-01), Tsuchiya et al.
patent: 4669037 (1987-05-01), Bobry

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