Switching power amplifier

Details Switching power amplifier Switching power amplifier

1987-05-26

1988-08-09

Mullins, James B.

Amplifiers

Modulator-demodulator-type amplifier

H23F 338

Patent

active

047630809

ABSTRACT:
The invention generally relates to a switching power amplifier, particularly for high power, highly efficient audio amplification. The power amplifier operates at a high switching frequency and includes a generator. The generator is coupled to receive the line voltage for converting it into a high frequency generator signal and includes at least one capacitor for storing a DC voltage. A bidirectional switch is coupled in series with the output of the generator for selectively applying the generator signal to the load via a low-pass filter, for providing a correction of the output signal of the amplifier. The shape, magnitude and frequency of the generator signal are not essential. The switch is the only power component which must be responsive to the input and output signals of the amplifier, and the generator signal. Generally, it can be switched at any time as to allow the correction. The low-pass filter having an inductive input is employed. However, the switch is protected against voltage surges as an excessive voltage thereacross is transformed, rectified and applied to the capacitor of the generator.

REFERENCES:
patent: 4571551 (1986-02-01), Trager

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