Patent ID: 8188793
Filing Date: 2012-05-29
Classification: H03F,H03G

Abstract:
1. A power amplification circuit comprising: a power amplifier having an input to receive an input signal, a power input to receive a power input signal, and an output to provide an amplified output signal based upon the input signal and the power input signal; an error amplifier having a first input to receive an amplification control signal, a second input, and an output electrically coupled to a power supply node that is adapted to be coupled to a power source, the error amplifier being adapted to control a current provided to the power input of the power amplifier; and a saturation detector, electrically coupled to the power supply node and to the power input of the power amplifier, to generate a saturation detection signal when the power supply node differs in voltage from the power input by less than a limit voltage of a transistor coupled to the power supply node and the power input.