Pulse width modulated signal amplifier

Details Pulse width modulated signal amplifier Pulse width modulated signal amplifier

1975-12-16

1977-05-03

Mullins, James B.

Amplifiers

Modulator-demodulator-type amplifier

330 75, H03F 338

Patent

active

040217450

ABSTRACT:
A pulse width modulated signal amplifier includes a first input terminal supplied with a rectangular wave signal as a carrier, a second input terminal supplied with a modulating signal, such as an audio signal, an integrator supplied with both the rectangular wave signal and the modulating signal, a high gain amplifier receiving the output of the integrator, a low pass filter receiving the output of the high gain amplifier and producing a demodulated signal corresponding to the modulating signal and which is supplied to an output terminal, and a negative feedback circuit connected between the output of the high gain amplifier and the input of the integrator.

REFERENCES:
patent: 3509479 (1970-04-01), Glucker et al.

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