System and method for improving power efficiency in GSM...

Details System and method for improving power efficiency in GSM... System and method for improving power efficiency in GSM...

2004-05-12

2009-06-09

Nguyen, Khanh V (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

C330S297000

Reexamination Certificate

active

07545217

ABSTRACT:
A method and circuit system for improving power efficiency of RF power amplifiers is disclosed. A preferred embodiment comprises a power amplifier comprising: a plurality of amplifier stages, a power regulator providing an output supply voltage at an output node responsive to an adjustable power control signal, wherein the output supply voltage is applied to at least one stage of a power amplifier; and an amplifier biaser providing a bias signal corresponding to the adjustable power control signal, wherein the output supply voltage and the bias signal are independently generated as functions of the adjustable power control signal.

REFERENCES:
patent: 6885246 (2005-04-01), Tsutsui et al.
patent: 7177370 (2007-02-01), Zhang et al.

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