Power amplifier circuit for audio signal and audio device using

Details Power amplifier circuit for audio signal and audio device using Power amplifier circuit for audio signal and audio device using

1995-04-24

1996-04-16

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330146, 330297, H03F 326

Patent

active

055086586

ABSTRACT:
A power amplifier circuit for an audio signal is provided with a switching control circuit and a switching circuit between an amplifier and a power source line or ground line and a smoothing circuit which smoothes current from the switching circuit and supplies the current to the amplifier, and the smoothing circuit is provided with a change-over switching circuit which operates to return a commutation current generated during switching OFF time to the smoothing circuit.

REFERENCES:
patent: 4218660 (1980-08-01), Carver
patent: 4472687 (1984-09-01), Kashiwagi et al.
patent: 4507619 (1985-03-01), Dijkstra et al.
patent: 4752747 (1988-06-01), Botti et al.
patent: 5075634 (1991-12-01), French
patent: 5200711 (1993-04-01), Andersson et al.
U.S. Ser. No. 08/199,890 filed Feb. 22, 1994 to K. Nishioka et al.
U.S. Ser. No. 08/203,307 Mar. 1, 1994 to K. Nishioka et al.

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