A dual‐modulus injection‐locked frequency divider with large locking range

Abstract

A dual‐modulus of 2/3 injection‐locked frequency divider with wide locking ranges is presented in this work. It uses an active inductor as the resonance loop, and a tunable active‐resistance is introduced to control the operation point and reinforce the injection efficiency. Simulations and measurements show that the proposed design can realize large locking ranges without any extra tuning, and cost low power consumption and small area. The divider was fabricated under the Chartered 0.35 μm CMOS technology, and the chip area is about 544 μm2. Measurements show that it has locking ranges from 1.5 to 2.05 GHz and 1.74 to 1.95 GHz at 0 dBm input power for divide‐by‐2 and ‐3, respectively, and the power consumed is only about 1.49 mW. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:269–272, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27290

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