TWO-POINT PHASE MODULATOR AND A CONVERSION GAIN CALIBRATION METHOD THEREOF, CAPABLE OF CORRECTING A CONVERSION GAIN ABOUT A MODULATION DATA AT A TIME

摘要

PURPOSE: A two-point phase modulator and a conversion gain calibration method thereof are provided to fix an output frequency signal by pumping an electric charge in a PLL circuit part on the initial stage of an operation.;CONSTITUTION: An input unit(100) outputs a frequency division control signal in response to a channel frequency signal and a modulation data. A PLL circuit part(200) saves a voltage corresponding to a detected phase difference. The PLL circuit part outputs an output frequency signal by varying a frequency in response to the saved voltage and a modulation signal. The PLL circuit part generates the divided frequency signal by dividing the output frequency signal in response to the frequency division control signal. A modulation signal generating part(300) outputs the modulation signal. A conversion gain calibrating part(400) outputs a conversion gain value in response to the output frequency signal and a reference frequency signal.;COPYRIGHT KIPO 2010