Patent ID: 7705672
Filing Date: 2010-04-27
Classification: H03F

Abstract:
1. An amplifier circuit, comprising: an input unit for receiving a main input signal, and for maintaining, and outputting a linearly amplified replica of the main input signal; a modulator controller that outputs a mutually exclusive first and second modulated signals from a respective first and second portion of the linearly amplified replica of the main input signal only when the input unit receives the main input signal; the first and the second modulated signals driving a voltage converter, with the voltage converter driving a respective first portion of a load and a second portion of the load; and a feedback unit for correction of a main output signal in relation to the main input signal; the modulator controller includes: a first modulator unit that outputs the first modulated signal from the first portion of the linearly amplified replica of the main input signal only when the input unit receives the main input signal; and a second modulator unit that outputs the second modulated signal from the second portion of the linearly amplified replica of the main input signal only when the input unit receives the main input signal, with the first and second modulated signal outputs being mutually exclusive; the first modulator unit is comprised of a first modulator having a first input terminal with a first polarity coupled with a first ramp generator, a second input terminal with a second polarity, opposite the first polarity, coupled with the linearly amplified replica of the main input signal, and a first output terminal; and the second modulator unit is comprised of a second modulator having a third input terminal with the first polarity coupled with the linearly amplified replica of the main input signal, and a fourth input terminal with the second polarity coupled with a second ramp generator, and a second output terminal.