Wide-locking range divide-by-5 injection-locked frequency divider using linear mixer approach for microwave device application

Abstract

A novel divide-by-5 injection-locked frequency divider (ILFD) is proposed and was implemented in the TSMC 0.18 pm 1P6M CMOS process. Conventional harmonic mixer divide-by-5 ILFD has limited locking range, this letter shows a wide locking range divide-by-5 ILFD designed with linear mixer technique. At the drain-source bias of 1.2 V and at the incident power of 0 dBm, the locking range of the divide-by-5 is 2 GHz, from the incident frequency 13.1 GHz to 15.1 GHz, the percentage is 14.18%. The core power consumption under the injection-locked condition is 4.2mW. The free-running oscillation frequency is 2.73GHz. The die area is 0.861 × 0.848 mm2. The proposed ILFD is based on a cross-coupled voltage-controlled oscillator (VCO).