A new wide locking range CMOS divide-by-2 injection locked frequency divider

In this work, a wide locking range differential injection locked frequency divider is proposed. The circuit is realized with a cross-coupled voltage controlled oscillator and an inductor. The inductor is placed on the common source of NMOS cross-coupled transistors which sums input and output signals. The external signal is injected to the common source node which has even harmonics of output frequency. Using of the inductor helps the circuit to easily operate at low voltage supply. The proposed circuit can divide the input frequency by order of two. The proposed ILFD draws 3.65 mA current from 1V supply voltage and locks from 10.05 GHz to 14.177 GHz of input frequency. The divider circuit is designed and simulated with the commercial 0.13μm CMOS technology

Keywords:

injection Locking , divider , voltage controlled oscillator , low power