TRANSMITTER FOR SUPPORTING MULTI-MODE AND MULTI-BAND USING MULTIPLE RADIO FREQUENCY DIGITAL-ANALOGUE CONVERTERS(RF DACS) AND CONTROL METHOD OF THE TRANSMITTER

摘要

A transmitter supporting multi-mode and multi-band using multiple radio frequency digital-to-analogue converters (RF DAC) is provided. According to an embodiment of the present invention, the transmitter comprises a first RF DAC which transmits a first signal in a first frequency band, a second RF DAC which transmits a second signal in a second frequency band distinguished from the first frequency band, and an impedance controller which controls impedance of an RF DAC operating in an impedance matching mode among the first RF DAC and the second RF DAC in order to adjust the range of frequencies of the other RF DAC operating in a data transmission mode.