Pulse width modulated amplifier

Details Pulse width modulated amplifier Pulse width modulated amplifier

1975-10-29

1977-11-22

Dahl, Lawrence J.

Amplifiers

Modulator-demodulator-type amplifier

330 75, 330207A, H03F 338

Patent

active

040598071

ABSTRACT:
A pulse width modulation circuit which comprises a mixer for combining an input audio signal with a feedback signal and for developing a difference signal to feed to an integration circuit. The integration circuit is coupled to a pulse width modulator which has a sawtooth carrier input for modulating the input audio signal. The resulting pulse modulated signal is then fed to a pulse amplifier and a low-pass filter and finally to a load. The output of the low-pass filter is coupled back to the mixer.

REFERENCES:
patent: 3336538 (1967-08-01), Crowhurst
patent: 3585517 (1971-06-01), Herbert
patent: 3845402 (1974-10-01), Nupp

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