Abstract
AbstractThis article presents a wide locking range injection locked frequency divider (ILFD) implemented using a standard 0.18‐μm CMOS process. The ILFD consists of a double‐cross‐coupled VCO and an injection MOS for coupling injection signal to the resonator. At the supply voltage of 1.8 V, the free‐running ILFD is tunable from 4.46 to 4.91 GHz. At the injection power of 0 dBm, the locking range of ILFD is tunable from 6.2 to 11 GHz. The percentage of ILFD locking range is 55.8%, which is the highest among similar published LC‐tank ILFDs. The phase noise of the ILFD can track with the injection source. The ILFD has been applied to form a quadrature ILFD and an on‐chip VCO has been designed to verify the function of the quadrature ILFD. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 806–809, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23193
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