Amplification circuit with over power protection

An amplifier circuit comprising:

• a first switch circuit, comprising a first terminal coupled to a radio frequency signal input terminal or a first system voltage terminal, a second terminal, and a control terminal configured to receive a first control signal;
• an amplifier, comprising an input terminal coupled to the second terminal of the first switch circuit and configured to receive a radio frequency signal, and an output terminal configured to output an amplified radio frequency signal;
• and
• a control circuit, coupled to the amplifier, and configured to generate the first control signal according to a driving current generated by the amplifier;
• wherein:
• when the control circuit determines that the amplifier is operating in a first high power state, the control circuit outputs the first control signal according to a magnitude of the driving current to adjust a conduction level between the first terminal and the second terminal of the first switch circuit.