RF Power Amplifier Mirror Circuit for Sensing Current
Published: September 11, 2008
Inventors: Salove; Matthew J.; (Portland, OR) ; Davenport; William H.; (Portland, OR) ; Parkhurst; Ray M.; (Hillsboro, OR) ; Cho; Jin W.; (Hillsboro, OR)
Abstract: An apparatus and method is disclosed for providing a mirror circuit for detecting a change in current of a RF power amplifier. The mirror circuit includes a voltage operably coupled with the mirror circuit, a bias circuit operably coupled with the mirror circuit, wherein the bias circuit is capable of applying a bias voltage to the mirror circuit, and an output reference signal. The output reference signal is proportional to the change of current in the RF power amplifier.