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Wide‐Locking Range Dual‐Band Injection‐Locked Frequency Divider
Author(s) -
Jang ShengLyang,
Wu ZhiHong,
Hsue ChingWen,
Teng HengFa
Publication year - 2013
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.27828
Subject(s) - frequency divider , microwave , multi band device , injection locking , electrical engineering , resonator , signal (programming language) , frequency multiplier , materials science , optoelectronics , frequency band , voltage , physics , cmos , engineering , telecommunications , optics , computer science , antenna (radio) , programming language , laser
A wide locking range divide‐by‐2 CMOS LC‐tank injection locked frequency divider is proposed and is realized with two mixers in series and a cross‐coupled oscillator with dual‐resonance LC resonator to provide large output voltage swings at high‐ and low‐frequency bands. The dual‐band function can be obtained without switching. Measurement results show that at the supply voltage of 0.8 V, the free‐running frequency is from 3.571 to 3.974 GHz for the high‐frequency band and from 2.278 to 2.349 GHz for the low‐frequency band. At V tune = 1.2 V, an external injected signal power of 0 dBm provides a low‐band divide‐by‐2 locking range (57.7%) from 2.87 to 5.2 GHz and a high‐band locking range (25.7%) from 7.1 to 9.2 GHz. At V tune = 0 V an external injected signal power of 0 dBm provides a high‐band locking range (46.5%) from 5.6 to 9 GHz and a low‐band locking range (25.0%) from 2.8 to 3.6 GHz. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2333–2337, 2013