Electronic device including power amplifier and front-end module including power amplifier

An electronic device comprising:

• a communication processor;
• a radio frequency (RF) integrated circuit (RFIC) configured to receive a signal output from the communication processor and to modulate the signal into an RF signal;
• a power management circuit;
• a first power amplifier configured to receive power supplied from the power management circuit;
• a second power amplifier connected in parallel to the first power amplifier and configured to receive the power supplied from the power management circuit;
• and
• a variable capacitor connected in parallel to a power supply terminal of the first power amplifier,
• wherein the communication processor is configured to:
• identify a power amplification mode based on a frequency band of the RF signal, and
• adjust capacitance of the variable capacitor by outputting a control signal corresponding to the identified power amplification mode,
• wherein based on the power amplification mode, the RF signal is amplified via either one of the first power amplifier or the second power amplifier.

A front-end module include:

• a power management circuit,
• a first power amplifier configured to receive power supplied from the power management circuit,
• a second power amplifier connected in parallel to the first power amplifier configured to receive the power supplied from the power management circuit,
• at least one capacitor connected in parallel to a power supply terminal of the first power amplifier, and
• at least one switch connected between the power supply terminal and the at least one capacitor and configured to control electrical connection or disconnection between the power supply terminal and the at least one capacitor,
• wherein the at least one switch is controlled by a control signal corresponding to a power amplification mode based on a frequency band of a radio frequency (RF) signal, and
• wherein based on the power amplification mode, the RF signal is amplified via either one of the first power amplifier or the second power amplifier.