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A low-voltage divide-by-3 injection-locked frequency divider

✍ Scribed by Chien-Feng Lee; Sheng-Lyang Jang

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
565 KB
Volume
50
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

This study proposes a new low‐voltage divide‐by‐3 CMOS 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 CMOS dynamic threshold voltage LC‐tank voltage‐controlled‐oscillator (VCO) with two injection MOSFETs. The self‐oscillating VCO is injection‐locked by third‐harmonic input to obtain the division order of three. Measurement results show that at the supply voltage of 0.36 V, the free‐running frequency is from 1.015 to 1.093 GHz. At the incident power of −10 dBm, the locking range is from the incident frequency 3.01 to 3.33 GHz. This is the lowest voltage ILFD ever reported in literatures. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1905–1908, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23499

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