- TRANSMITTER FOR SUPPORTING MULTI-MODE AND MULTI-BAND USING MULTIPLE RADIO FREQUENCY DIGITAL-ANALOGUE CONVERTERSRF DACS AND CONTROL METHOD OF THE TRANSMITTER

摘要

A transmitter that supports multiple modes and multiple bands using a plurality of radio frequency digital-to-analog converters is provided. According to one embodiment, the transmitter comprises a first radio frequency digital-to-analog converter (RF DAC) for transmitting a first signal in a first frequency band, a second RF frequency band for transmitting a second signal in a second frequency band, A second radio frequency digital-to-analog converter, and a first radio frequency digital-to-analog converter and a second radio frequency digital-to-analog converter in a data transmission mode And an impedance controller for adjusting the impedance of a radio frequency digital-to-analog converter operating in an impedance matching mode.;