Rf power amplifier with linearization

Details Rf power amplifier with linearization Rf power amplifier with linearization

Category

H - Electricity

Subcategory

03

Subsubcategory

F

IPC codes

H03F 1/32 (2006.01) H04B 1/04 (2006.01)

Type

Patent

Patent number

CA 2109063

Description

A radio transmitter is provided comprising: a power amplifier (12); linearizing means (10) for maintaining linearity in the power amplifier; and feedback means (13) for feeding a signal from an output of the power amplifier to the linearizing means for maintaining linearity, said amplifier, linearizing means and feedback means forming a loop having adjustable loop linearization parameters (for example phase and gain); a look-up table (19) for storing predetermined loop linearization parameters; and con- trol means having an operating condition input, said control means being coupled to the look-up table and the loop for selecting a loop linearization parameter in response to a transmit control signal according to an operating condition input, such as battery level or temperature, to the central means at the time of receipt of the transmit control signal. The invention also provides an adja- cent channel receiver for monitoring the linearization and other factors.

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