Dynamic allocation of power supplied by a power supply and...

Details Dynamic allocation of power supplied by a power supply and... Dynamic allocation of power supplied by a power supply and...

2005-01-11

2005-01-11

Woo, Stella (Department: 2643)

Electrical audio signal processing systems and devices

Voice controlled

C381S120000

Reexamination Certificate

active

06842527

ABSTRACT:
The power voltage supply for a power amplifier is switched between an operational full power mode and a reduced power mode by the switching of a dual state impedance device connected in series between the power amplifier and the power supply. A control circuit detects the level of a signal to be amplified by that amplifier and switches the impedance states thus reducing the power output capability of the power amplifier and placing the power amplifier into a reduced power mode. In one embodiment, the signal is produced by spectrally filtering with a low pass filter, with the cross-over frequency being adjustable. Additionally, the gain of the amplifier can be reduced for high level signals.

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Search Report for PCT Appln PCT/US01/46702 dated Jun. 25, 2003.

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