Power amplifier and power amplifying method

A power amplifier that amplifies a modulated signal including amplitude modulated components and phase modulated components as a transmission signal, the power amplifier comprising:

• a first voltage source that amplifies low-frequency components of the amplitude modulated components of the modulated signal to output a first voltage;
• a second voltage source that amplifies high-frequency components of the amplitude modulated components of the modulated signal to output a second voltage;
• a current source that amplifies the amplitude modulated components of the modulated signal to output a current;
• a combiner circuit that combines the first voltage, the second voltage, and the current to generate a modulated power supply signal;
• and
• an RF amplifier that amplifies a signal obtained by up-converting the phase modulated components to a carrier frequency and outputs the amplified signal after modulating amplitude of the amplified signal by the modulated power supply signal.

A power amplifying method that amplifies a modulated signal including amplitude modulated components and phase modulated components, the method comprising:

• amplifying low-frequency components of the amplitude modulated components of the modulated signal to output a first voltage;
• amplifying high-frequency components of the amplitude modulated components of the modulated signal to output a second voltage;
• amplifying the amplitude modulated components of the modulated signal to output a current;
• combining the first voltage, the second voltage, and the current to generate a modulated power supply signal, and
• amplifying a signal obtained by up-converting the modulated signal to a carrier frequency, and outputting the amplified signal after modulating amplitude of the amplified signal by the modulated power supply signal.

A power amplifying method that amplifies a modulated signal including amplitude modulated components and phase modulated components, the method comprising:

• amplifying low-frequency components of the amplitude modulated components of the modulated signal to output a first voltage;
• amplifying high-frequency components of the amplitude modulated components of the modulated signal to output a second voltage;
• amplifying the amplitude modulated components of the modulated signal to output a current;
• combining the first voltage, the second voltage, and the current to generate a modulated power supply signal;
• and
• amplifying a signal obtained by up-converting the phase modulated components to carrier frequency, and outputting the amplified signal after modulating amplitude of the amplified signal by the modulated power supply signal.