Isolation amplifier

Details Isolation amplifier Isolation amplifier

1974-11-07

1976-03-23

Mullins, James B.

Amplifiers

Modulator-demodulator-type amplifier

H03F 338

Patent

active

039463249

ABSTRACT:
An isolation amplifier comprising three separate, conductively-isolated sections: (1) an input section including an AC modulator, (2) an output section including a demodulator, and (3) an oscillator section. The AC signal from the oscillator section is transformer-coupled to the modulator section to provide the AC carrier excitation for the modulator and also to energize a rectifier power supply circuit to produce DC voltages for the active elements of the input section. The modulated carrier signal developed by the modulator section is transformer-coupled to the demodulator section. Each of the transformers includes two separate cores which are coupled inductively by single-turn windings. Special electrostatic shielding is provided to reduce leakage effects.

REFERENCES:
patent: 2205075 (1940-06-01), Wilhelm
patent: 3156859 (1964-11-01), Cox
patent: 3196364 (1965-07-01), Latham, Jr.
patent: 3405366 (1968-10-01), Philbrick

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