Patent ID: 8164383
Filing Date: 2012-04-24
Classification: H03F,H03K

Abstract:
1. An amplifier circuit comprising: a input stage to receive an input signal; a first output stage coupled to a first output of the input stage, wherein the first output stage is configured to receive first power supply voltages; a second output stage coupled to the first output of the input stage, wherein the second output stage is configured to receive second power supply voltages, wherein a first voltage difference between the first power supply voltages is less than a second voltage difference between the second power supply voltages; an output node coupled to an output of the first output stage and an output of the second output stage; and a switching stage to provide outputs to the first output stage and the second output stage to configure the first output stage and the second output stage to provide a first current to the output node exclusively from the first output stage when a magnitude of a voltage on the output node is below a first value, provide a second current to the output node exclusively from the second output stage when the magnitude of the voltage on the output node is above a second value greater than the first value, and provide a third current to the output node from both the first output stage and the second output stage when the magnitude of the voltage on the output node is between the first value and the second value.