LINEAR RF TRANSMITTER AND METHOD OF OPERATION

摘要

A linear RF transmitter (100) includes a forward path (102, 105, 107) for receiving and processing a baseband input signal, including an upconverting mixer (120, 122) to convert a baseband signal into a modulated RF signal, and a RF (radio frequency) power amplifier (126) to amplify a modulated RF signal produced by the mixer, a non-linearity detector (125) connected to the forward path to sample a baseband signal for delivery to the mixer and to detect nonhneanty of the transmitter and provide in response a control signal to change operation of the transmitter to reduce the non-linearity. The transmitter further includes a regulator (111) connective to a supply voltage source (113) and to the RF power amplifier to deliver a vapable supply voltage to the RF power amplifier and a controller (127) to produce a control signal which controls adjustment by the regulator (111) of the supply.