Gigahertz range injection locked frequency dividers with band-width enhancement and supply rejection

A feedback topology, improving the performance of injection locked frequency dividers (ILFDs) in terms of locking range and supply rejection, is presented. The locking range is improved by 60% compared with conventional designs. The proposed ILFD can work robustly with supply rejection since the self-resonant frequency of the proposed ILFDs is independent of the input DC voltage. Fabricated in a standard 0.18 mum CMOS technology, the proposed ILFD is able to work from 4 to 8.2 GHz with a maximum power consumption of 2.84 mW from a 1.8 V supply.