Isolation amplifier

Details Isolation amplifier Isolation amplifier

1985-05-21

1986-08-26

LaRoche, Eugene R.

Amplifiers

Modulator-demodulator-type amplifier

330207A, 330251, H03F 338, H03F 3217

Patent

active

046085416

ABSTRACT:
The invention comprises an isolation amplifier including an input circuit and an output circuit coupled through an isolation transformer. A switching type balanced modulator modulates a square wave carrier with an analog signal input and delivers the resulting signal to the input of the isolation transformer. A demodulator in the output circuit inverts alternate points of the modulated square wave carrier to essentially reproduce the analog input. A sample and hold capacitor circuit connected to the output of the demodulator fills the gap between the trailing and leading edges of successive pulses.

REFERENCES:
patent: 3430125 (1969-02-01), Povenmire et al.
patent: 3466557 (1969-09-01), Nazareth
patent: 3899745 (1975-08-01), Fletcher et al.

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