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A CMOS LC injection-locked frequency divider with the division ratio of 2 and 3

✍ Scribed by Sheng-Lyang Jang; Chien-Feng Lee; Jhong-Chen Luo

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
421 KB
Volume
51
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

This article proposes a new CMOS LC‐tank injection locked frequency divider (ILFD) fabricated in a 0.18‐μm CMOS process and describes the operation principle of the ILFD. The ILFD circuit is realized with a double cross‐coupled CMOS LC‐tank oscillator with a symmetric MOS‐switched LC resonator. The ILFD can be used as a first‐harmonic injection‐locked oscillator, divide‐by‐2 and divide‐by‐3 frequency divider depending upon the frequency of the injection signal. Measurement results show that at the supply voltage of 1.8 V, the free‐running frequency is from 5.12 to 5.64 GHz. The core current and power consumption of the divider are 2.76 mA and 4.97 mW, respectively. At the incident power of 0 dBm, the locking range is from the incident frequency 9.48 to 11.48 GHz (15.04 to 17.12 GHz) in the divide‐by‐2(3) mode. © 2009 Wiley Pe riodicals, Inc. Microwave Opt Technol Lett 51: 1263–1267, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24312

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