Patent ID: 7642847
Filing Date: 2010-01-05
Classification: H03F

Abstract:
1. A circuit comprising: An amplifier element, having an amplifier input, an amplitude input, and an output; An input signal modulator having a first output, operable to produce a first modulated signal on the first output in response to a first input signal, the input indicative of a phase-related characteristic, the first output coupled to the amplifier input; An amplitude modulator having a second output, operable to produce an amplitude modulation signal on the second output, the second output coupled to the amplitude input; A voltage supply having a third input, coupled to the amplitude modulator; A control circuit coupled to the voltage supply and operable to control the output of the voltage supply; A detection circuit, coupled to the amplitude modulator and to the control circuit, and operable to detect a particular state of the amplitude modulator; the detection circuit operable to relay to the control circuit a signal indicative of the particular state of the amplitude modulator, and the control circuit operable effect a change the voltage supply in response to the signal from the detection circuit; wherein the change in voltage supply changes the output of the amplitude modulator.