Audio power amplifier with class-D push-pull output stage

Details Audio power amplifier with class-D push-pull output stage Audio power amplifier with class-D push-pull output stage

1981-04-28

1983-06-28

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including class d amplifier

330207A, 330 10, 330126, H03F 3217, H03F 338, H03F 368

Patent

active

043908497

ABSTRACT:
An audio power amplifier with class-D push pull output stage is disclosed using a "mixture" of pulse-width modulation and pulse-amplitude modulation and driving the class-D push pull output stage with the resulting combination signal. To do this, the digital output signal of the analog-to-digital converter in the input stage is split up in such a way that only its high-order bits control the pulse-width modulator, while the other low-order bitsare changed into the aforementioned pulse-amplitude-modulated signal by means of an analog-to-digital converter.

REFERENCES:
patent: 4346349 (1982-08-01), Yokoyama

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