Efficiency Enhancement Techniques for Digital Power Amplifiers

With CMOS process scaling down, digital RF architecture aligns with Moore’s law to provide compact die area, better interface to digital backend and higher efficiency due to the faster switching nature of core devices. Complex OFDM modulation schemes with large peak-to-average power ratio (PAPR) are widely employed in modern wireless communication systems, which challenges the design of transmitters/power amplifiers to achieve enhanced efficiency at deep Power BackOff (PBO) regions while obtaining high data rate and watt-level output power. This talk will discuss efficiency enhancement techniques for wideband digital power amplifiers and transmitters.