Highly efficient and linear level shifting digital LINC transmitter with a phase offset cancellation

In this paper, a novel level shifting digital linear amplifier with nonlinear components (LINC) transmitter for OFDM system is presented. By using a multi-level switched power supply, the final power added efficiency is significantly improved compared to a conventional LINC amplifier. Moreover, with digital phase offset cancellation scheme, the transmitter has a good linearity as well. This work was verified by ADS simulation with standard 0.18μm CMOS Technology.