Muting circuit using common mode rejection of differential ampli

Details Muting circuit using common mode rejection of differential ampli Muting circuit using common mode rejection of differential ampli

1991-12-23

1993-05-04

Ng, Jin F.

Electrical audio signal processing systems and devices

Noise or distortion suppression

Interpolation

381 86, 381107, 455212, 455221, H04B 1500

Patent

active

052088650

ABSTRACT:
Differential signals are employed in a distributed audio system to improve noise immunity of the low level differential signals transmitted between a main unit and a power amplifier. The power amplifier may be in an auxiliary output unit which is locally muted by employing a field-effect transistor connected between the differential signals. When the field-effect transistor is turned on by a mute signal, the common mode rejection of the differential amplifier is employed to mute the amplifier output.

REFERENCES:
patent: 4288753 (1981-09-01), Babano
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patent: 4703507 (1987-10-01), Holden
patent: 4736434 (1988-04-01), Filliman
patent: 4759065 (1988-07-01), Field et al.
patent: 4975963 (1990-12-01), Liberman
patent: 4979218 (1990-12-01), Strahm
patent: 4983927 (1991-01-01), Torazzina

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