High fidelity audio encoder/amplifier

Details High fidelity audio encoder/amplifier High fidelity audio encoder/amplifier

1981-02-02

1983-09-13

Mullins, James B.

Amplifiers

Modulator-demodulator-type amplifier

330 59, 330251, 330308, H03F 338

Patent

active

044045263

ABSTRACT:
An encoder/amplifier giving low distortion, low noise, high power operation. A pair of 180.degree. displaced sawtooth signals are generated from a fixed frequency clock and compared to an undistorted audio input signal. A constant current source and a pair of balanced capacitors are used in this input stage to provide self-nulling of noise. Optical isolation is used between the input encoder and power output stages to eliminate any ground noise occurring on the audio input lines and obviate the need for a large DC power supply transformer.

REFERENCES:
patent: 3585517 (1971-06-01), Herbert
patent: 4117411 (1978-09-01), Goble
patent: 4162455 (1979-07-01), Birt

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