A Low-Power GSMEDGEWCDMA Polar Transmitter in 65-nm CMOS Michael Youssef Alireza

Abstract

Mohammadi, Hooman Darabi, Senior Member , IEEE, and Asad A. Abidi , Fellow, IEEE Abstract—A low-power, multimode polar transmitter based on a two-point injection PLL with a linearized VCO is implemented in 65-nm CMOS technology. A wideband feedback loop, nested in- side the PLL with negligible area and power consumption over- head, linearizes and accurately controls the tuning characteristic of the VCO, which is a key requirement when directly modulating the oscillator. Differential delay betwe