Patent ID: 7248842
Filing Date: 2007-07-24
Classification: H03C,H03F,H04B,H04L

Abstract:
1. A wireless communication apparatus comprising: a base band circuit for generating I and Q signals in accordance with transmitting data; a transmitting oscillator for generating a carrier signal; a power amplifier for amplifying the carrier signal outputted from the transmitting oscillator; a power detector for detecting a power level of a transmitting output signal from the power amplifier; and a semiconductor integrated circuit for modulation including an orthogonal modulator for modulating the I and Q signals onto the carrier signal so as to form an oscillating signal of a predetermined frequency, a phase control loop which has a phase detector and controls a phase of the carrier signal, and an amplitude control loop which has an amplitude detector and controls an amplitude of the transmitting output signal, wherein the phase control loop includes a feedback path for supplying a signal in accordance with an output of the power detector, wherein the amplitude control loop includes the feedback path for supplying a signal in accordance with an output of the power detector, and wherein the wireless communication apparatus has a first modulation mode and a second modulation mode, and wherein the phase control loop is shared by the first modulation mode and the second modulation mode.