WIDE-LOCKING RANGE ÷3 ACTIVE-INDUCTOR INJECTION-LOCKED FREQUENCY DIVIDER USING THE PUSH-PUSH OSCILLATOR

A new wide locking range active-inductor divide-by-3 injection-locked frequency divider (ILFD) using a standard 0.18-mu m CMOS process is presented. The push-push ILFD circuit is realized with a push-push cross-coupled n-core MOS LC-tank oscillator. The core power consumption of the ILFD core is 7.41 mW. The divider's free-running frequency is tunable from 1.39 to 3.18 GHz by tuning the varactor's control bias, and at the incident power of 0 dBm the maximum locking range is 2.9 GHz (43.6%), from the incident frequency 5.2 to 8.1 GHz. The operation range is 5.9 GHz (80.27%), from 4.4 to 10.3 GHz. (C) 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53: 2771-2773, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26426