Patent ID: 7200369

Claim:
A linear amplification with nonlinear components (LINC) power transmitter, comprising: a digital signal processing unit which controls the LINC power transmitter; a frequency modulation unit which modulates or converts a digital signal output from the digital signal processing unit into a radio-frequency (RF) signal; a signal amplification unit which amplifies the RF signal output from the frequency modulation unit using a gain amplifier and a power amplification module; and a direct current/direct current (DC/DC) conversion unit which controls bias of the power amplification module, wherein the DC/DC conversion unit controls a base bias and/or a collect bias of the power amplification module, and the power amplification module operates in saturation; wherein the frequency modulation unit comprises: a digital/analog (D/A) converter which receives a digital signal output from the signal component separator and converts the received digital signal into an analog signal; a low pass filter which only passes a low frequency signal among analog signals output from the D/A converter; a quadrature modulator which quadrature-modulates a signal output from the low pass filter; and a local oscillator which provides an oscillation signal to operate the quadrature modulator.