Gain control for linear radio frequency power amplifiers

Details Gain control for linear radio frequency power amplifiers Gain control for linear radio frequency power amplifiers

2011-06-28

2011-06-28

Pascal, Robert (Department: 2817)

Amplifiers

With control of power supply or bias voltage

C330S133000

Reexamination Certificate

active

07969240

ABSTRACT:
A bias control circuit is provided comprising an input port for receiving a signal indicative of an amplitude of a supply voltage provided to a multi stage power amplifier circuit. Electronic circuitry, electrically coupled to the input port, generates a bias control signal in dependence upon the signal indicative of a supply voltage for provision to a first stage power amplifier of the multi stage power amplifier circuit. The bias control signal is generated such that a gain change of the multi stage power amplifier circuit due to a supply voltage change is substantially compensated.

REFERENCES:
patent: 5670912 (1997-09-01), Zocher
patent: 6917243 (2005-07-01), Doherty et al.
patent: 7420421 (2008-09-01), Lie et al.
patent: 2005/0242882 (2005-11-01), Anderson
patent: 2008/0139146 (2008-06-01), Behzad
UK Search Report, “Patents Act 1977: Search Report under Section 17”, dated Sep. 24, 2009, 1 pg.

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