Power Amplifier Apparatus, and Receiving Apparatus of a User Equipment

摘要

A Power Amplifier (PA) apparatus includes a first stage PA tube, configured to amplify gain of input signals. A first stage bias circuit is connected to the first stage PA tube and is configured to provide bias voltage for the first stage PA tube. A second stage PA tube is configured to amplify gain of output signals of the first stage PA tube. A second stage bias circuit is configured to provide bias voltage for the second stage PA tube. A reference voltage unit is connected to the first stage bias circuit and the second stage bias circuit. A voltage control unit is connected to the first stage bias circuit and the second stage bias circuit and is configured to connect and disconnect the first stage PA tube through the first stage bias circuit, and connect and disconnect the second stage PA tube through the second stage bias circuit.