Radio frequency power amplifier circuit and method

Details Radio frequency power amplifier circuit and method Radio frequency power amplifier circuit and method

2006-05-30

2008-03-11

Nguyen, Patricia (Department: 2817)

Amplifiers

With control of power supply or bias voltage

With control of input electrode or gain control electrode bias

C330S133000, C330S096000, C330S085000

Reexamination Certificate

active

07342445

ABSTRACT:
A method (200) and radio frequency amplifier circuit (100) for adjusting a gain setting of a power amplifier (102) and a gain setting of a power amplifier driver (106) that form part of the radio frequency amplifier circuit (100). The method (200) includes selecting (220) a power output value for the power amplifier and an associated constant envelope modulated radio frequency signal supplied by the power amplifier driver (106) to the power amplifier (102) and then sensing variations (240) in a power output value of the power amplifier (102). Next there is performed adjusting (250) both the gain setting of the power amplifier (102) and adjusting the gain setting of the power amplifier driver (106) in response to the sensing so that the constant envelope modulated signal is within a linear operating region of the power amplifier (102). The gain settings of the power amplifier (102) and power amplifier driver (106) are concurrently adjusted until the power output value for the power amplifier is achieved.

REFERENCES:
patent: 5003270 (1991-03-01), Braathen et al.
patent: 5977831 (1999-11-01), Davis et al.
patent: 6525873 (2003-02-01), Gerrish et al.
patent: 6580901 (2003-06-01), Mochizuki
patent: 7009449 (2006-03-01), Habring et al.
patent: 7103029 (2006-09-01), Minowa

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