Audio amplifier system with improved isolation between preamplif

Details Audio amplifier system with improved isolation between preamplif Audio amplifier system with improved isolation between preamplif

1996-01-05

1998-05-12

Kuntz, Curtis

Electrical audio signal processing systems and devices

Noise or distortion suppression

Hum or ground loop

381120, 381121, 330297, 330267, 330202, H04B 1500, H03F 304

Patent

active

057518238

ABSTRACT:
An audio amplifier, particularly suited for automotive applications, providing improved isolation between the preamplifier section and the power amplifier section. The preamplifier section ground is isolated from the power amplifier section ground. The amplifier includes a voltage regulator with output feedback for supplying a regulated voltage to the preamplifier section. The voltage regulator is referenced to the preamplifier section ground.

REFERENCES:
patent: 4517528 (1985-05-01), Tanaka et al.
patent: 4979218 (1990-12-01), Strahm
patent: 5170081 (1992-12-01), Adachi et al.
patent: 5517572 (1996-05-01), Heyl
patent: 5610555 (1997-03-01), Funahashi et al.

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