Patent ID: 7777569
Filing Date: 2010-08-17
Classification: H03F

Abstract:
1. An apparatus comprising: an input stage having biasing circuitry that is coupled to a first intermediate node and a second intermediate node, wherein the input stage is adapted to receive at least one input signal, and wherein at least a portion of the input stage is actuated by a first control signal; a control amplifier stage, wherein at least a portion of the control amplifier stage is actuated by a second signal, and wherein the control amplifier stage includes: a control circuit that is coupled to the control amplifier stage, the bias circuitry, at least one of the first and second intermediate nodes, wherein at least a portion of the control circuit is actuated by the second control signal; and an output stage that is coupled to the first and second intermediate nodes, wherein the output stage is adapted to provide at least one output signal.