All digital wideband polar transmitter

A novel architecture of all-digital polar transmitters is presented, which replaces high dynamic range analog circuits with high speed digital circuits and thus offers lower cost and higher performance compared to those of conventional analog transmitters. The proposed transmitter is mainly composed of an all digital PLL for phase modulation, and 1bit low pass ΣΔ modulator for amplitude modulation and Digital Power Amplifier arrays. The design is modeled and analyzed in MATLAB and realized based on TSMC 65nm CMOS process.