Area efficient inter-coupled differential injection enhancement wide locking range injection locked frequency divider

This paper presents the design of fully differential injection locked frequency divider (ILFD) using area efficient inter-coupled differential injection enhancement of input signal. Fabricated in 65nm CMOS process technology, the proposed inter-coupled differential injection enhanced ILFD achieves twice the locking range with half the area in comparison with the single-ended inductor injection enhancement techniques. Without any varactor tuning, the divider achieves a locking range of 10.5% with an injected power of 0 dBm. The divider delivers an output power of −7 dBm and the DC power consumption is 3.6 mW.