Apparatus and method for processing of amplifier...

Details Apparatus and method for processing of amplifier... Apparatus and method for processing of amplifier...

2006-03-09

2010-12-21

Chin, Vivian (Department: 2614)

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

C700S094000, C330S151000, C381S120000, C455S114300

Reexamination Certificate

active

07856105

ABSTRACT:
A feed-forward amplifier includes a main amplifier having input signals and amplified output signals and an error amplifier for amplifying distortion signals to be added to the amplified output signals of the main amplifier to produce an amplifier output. A pilot tone modulation and recovery circuit modulates a pilot tone to be coupled to the input signals of the main amplifier and recovers the pilot tone from the amplifier output. The pilot tone modulation and recovery circuit includes a digital filter and a signal source. The signal source is used to both modulate the pilot tone and control the digital filter for recovering the pilot tone.

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