Wide-band dual-resonance capacitive cross-coupled divide-by-5 injection-locked frequency divider

摘要

A wide locking range divide-by-5 injection-locked frequency divider (ILFD) is proposed and was implemented in the TSMC 0.18-m 1P6M CMOS process. Conventional divide-by-5 ILFD has limited locking range. The proposed divide-by-5 ILFD is based on a capacitive cross-coupled voltage-controlled oscillator (VCO) with a dual-resonance resonator, which is implemented in the divide-by-5 ILFD to obtain a wide overlapped locking range. At the drain-source bias V-DD of 0.9V and at the incident power of 0dBm, the measured locking range of the divide-by-5 ILFD is 3.2GHz, from the incident frequency 9.4 to 12.6GHz, the percentage is 29.09%. The core power consumption is 2.98mW. The die area is 0.987x1.096mm(2).