Injection-locked frequency divider using single-injected dual-injection MOSFETs

Abstract

A wide locking range and operation range push–push divide-by-4 injection-locked frequency divider (ILFD) is proposed in the paper and was implemented in the TSMC 0.18μm BiCMOS process. The divide-by-4 ILFD uses a cross-coupled voltage-controlled oscillator (VCO) with a parallel-tuned LC resonator for easy startup oscillation and single-ended injected dual-injection transistors. The common drain node of dual injection transistors is AC-tied to the output of a frequency doubler. At the drain-source bias of 0.8V, and at the incident power of 0dBm the operation range of the divide-by-4 is 3.23GHz, from the incident frequency 15.85 to 19.08GHz, the percentage is 18.49%. The locking range of the divide-by-4 is 1.4GHz, from the incident frequency from 17.08GHz to 19.08GHz, the percentage is 11.06%. The core power consumption is 6.53mW. The die area is 0.83×0.597mm2.