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A current reused CMOS quadrature injection-locked frequency divider

✍ Scribed by Yun-Hsueh Chuang; Sheng-Lyang Jang; Shao-Hwa Lee; Yeuh-Hua Chiang

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
230 KB
Volume
49
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

A new current‐reused injection‐locked frequency divider is proposed to generate quadrature outputs and implemented using the standard UMC 0.18 μm CMOS 1P6M process. The proposed circuit is made of two LC‐tank voltage controlled oscillators (VCOs) stacked in series and the VCOs are coupled with the coupling transistors to generate quadrature signals. The direct injection‐locked technique is applied to the VCO to perform a divide by two functions, so that the quadrature circuit can provide low phase noise signal. At the 1.8 V supply voltage, the free running frequency of proposed circuit operates from 2.3 to 2.63 GHz and provides 1 GHz locking from 4.43 to 5.43 GHz. The power consumption is 7.4 mW with 4.1 mA current consumption. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1804–1806, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22604

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