RFDAC (RF (RADIO FREQUENCY) DAC (DIGITAL-TO-ANALOG CONVERTER)) WITH IMPROVED EFFICIENCY AND OUTPUT POWER

摘要

High efficiency amplitude DACs (Digital-to-Analog Converters) and RFDACs (Radio Frequency DACs) employing such amplitude DACs are discussed. One exemplary embodiment is a DAC comprising a plurality of DAC stages, wherein each DAC stage of the plurality of DAC stages is associated with a respective predetermined voltage of a plurality of predetermined voltages, wherein each DAC stage of the plurality of DAC stages can receive a digital signal at the respective predetermined voltage associated with that DAC stage when the respective predetermined voltage of that DAC stage is a selected predetermined voltage, wherein the selected predetermined voltage is based on an amplitude of the digital signal, and wherein each DAC stage of the plurality of DAC stages can generate a respective analog signal associated with that DAC stage based on the digital signal received at that DAC stage when the respective predetermined voltage of that DAC stage is the selected predetermined voltage.