Power amplification device

A power amplification device, comprising:

• a substrate including a first surface and a second surface on a side opposite to the first surface;
• a first integrated circuit and a coupler that are on the first surface;
• and
• a second integrated circuit on the second surface, wherein
• the first integrated circuit includes:
• a final-stage carrier amplifier configured to amplify an inputted high-frequency signal;
• a final-stage peak amplifier configured to amplify an inputted high-frequency signal;
• a bias circuit configured to provide bias to the final-stage carrier amplifier;
• and a bias circuit configured to provide bias to the final-stage peak amplifier,
• the second integrated circuit includes:
• a splitter;
• a first-stage carrier amplifier configured to amplify an inputted high-frequency signal;
• a first-stage peak amplifier configured to amplify an inputted high-frequency signal;
• a bias circuit configured to provide bias to the first-stage carrier amplifier;
• a bias circuit configured to provide bias to the first-stage peak amplifier;
• and a control circuit, and
• the control circuit includes:
• a detector circuit configured to output a control signal to control bias of at least one of the first-stage peak amplifier and the final-stage peak amplifier;
• and
• a variable attenuator configured to receive a first high-frequency signal inputted from an outside to the second integrated circuit and a signal outputted from the bias circuit that provides bias to the final-stage carrier amplifier, and is configured to output to the detector circuit a high-frequency signal obtained by attenuating the first high-frequency signal.