Polyphase PDM amplifier

Details Polyphase PDM amplifier Polyphase PDM amplifier

1977-09-26

1979-08-14

Mullins, James B.

Amplifiers

Modulator-demodulator-type amplifier

330207A, 330251, 332 31R, H03F 338

Patent

active

041647149

ABSTRACT:
A system wherein input signals are pulse duration modulated to provide a plurality of pulse trains having a predetermined phase relation therebetween. The plurality of pulse trains control the operation of separate switching elements. The output of the switching elements are summed and filtered to provide a composite amplified signal. The number of switching elements and the number of pulse trains are determined by the desired fidelity of operation and the frequency response of the switching elements. The system is particularly useful as a power audio amplifier for use in modulating stages of RF transmitters.

REFERENCES:
patent: 3260912 (1966-07-01), Gregory
patent: 3579132 (1971-05-01), Ross
patent: 3585517 (1971-06-01), Herbert
patent: 3629616 (1971-12-01), Walker
patent: 3648186 (1972-03-01), Kahn
patent: 4004246 (1977-01-01), Hamada

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