Multi-mode power amplifiers with phase matching

A wireless device comprising:

• a transceiver configured to generate a radio frequency signal;
• and
• a multi-mode power amplifier configured to receive the radio frequency signal at a radio frequency input and to provide an amplified radio frequency signal at a radio frequency output, the multi-mode power amplifier including a first common-base amplifier stage and a first common-emitter amplifier stage in a first amplification path, a second common-base amplifier stage and a second common-emitter amplifier stage in a second amplification path that is in parallel with the first amplification path between the radio frequency input and the radio frequency output, and a bias circuit configured to operate the multi-mode power amplifier in a selected power mode chosen from a plurality of power modes, the bias circuit configured to selectively activate the first amplification path by controlling a base bias of the first common-base amplifier stage, and to selectively activate the second amplification path by controlling a base bias of the second common-base amplifier stage.

A packaged module comprising:

• a package substrate;
• and
• an integrated circuit die on the package substrate and including a multi-mode power amplifier, the multi-mode power amplifier including a first common-base amplifier stage and a first common-emitter amplifier stage in a first amplification path, a second common-base amplifier stage and a second common-emitter amplifier stage in a second amplification path that is in parallel with the first amplification path between a radio frequency input and a radio frequency output, and a bias circuit configured to operate the multi-mode power amplifier in a selected power mode chosen from a plurality of power modes, the bias circuit configured to selectively activate the first amplification path by controlling a base bias of the first common-base amplifier stage, and to selectively activate the second amplification path by controlling a base bias of the second common-base amplifier stage.