Patent ID: 8442153
Filing Date: 2013-05-14
Classification: H03F,H04B

Abstract:
1. A transmission circuit that amplifies a power of an input transmission signal by switching an operation mode of the transmission circuit between a polar modulation mode and a quadrature modulation mode, the transmission circuit comprising: a radio frequency integrated circuit that controls the operation mode of the transmission circuit on the basis of the input transmission signal, generates an amplitude-modulated signal and a phase-modulated signal in the polar modulation mode, and generates a quadrature-modulated signal in the quadrature modulation mode; an envelope management integrated circuit that generates a control voltage on the basis of the amplitude-modulated signal from the radio frequency integrated circuit or a power supply voltage; and a power amplifier that amplifies a power of the phase-modulated signal or the quadrature-modulated signal from the radio frequency integrated circuit on the basis of the control voltage from the envelope management integrated circuit, the envelope management integrated circuit including: