Volume-based adaptive biasing

Details Volume-based adaptive biasing Volume-based adaptive biasing

2007-03-20

2011-12-20

Faulk, Devona (Department: 2614)

Electrical audio signal processing systems and devices

Including amplitude or volume control

With manual volume control

C381S104000, C381S108000, C330S127000, C330S133000, C330S134000, C330S136000

Reexamination Certificate

active

08081777

ABSTRACT:
An audio amplifier such as for driving headphones. The amplifier includes multiple amplifier devices coupled in parallel. Both a bias generator and a volume control are responsive to a user setting. Under low output signal conditions, one or more of the amplifier devices are disabled in response to the user setting. Disabled amplifier devices do not consume output bias current. Thus the audio amplifier has reduced power consumption, and the system has longer battery life.

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