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A transformer‐based injection‐locked frequency divider
Author(s) -
Wan Cao,
Wu Liang,
Zhu Haoshen,
Xu Taotao,
Xue Quan
Publication year - 2021
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.32924
Subject(s) - frequency divider , current divider , electrical engineering , transformer , frequency multiplier , wilkinson power divider , voltage divider , voltage , materials science , power consumption , cmos , engineering , optoelectronics , power (physics) , physics , quantum mechanics
This letter reports a divide‐by‐four injection‐locked frequency divider with a transformer‐based fourth‐order tank. In the divider, the tank has two resonance peaks at ω 0 and 3ω 0 to enhance the injection efficiency, therefore, the locking range is enlarged. Besides, the divider contains a buffer for output third‐harmonic suppression. The proposed divider has been fabricated in 65 nm CMOS process with a die size of 0.535 mm 2 , and the power consumption is 9.8 mW at 0.6 V supply voltage. The locking range is 12.1% from 27.8 to 31.4 GHz at 0 dBm power injection, the third‐harmonic rejection is over 18 dB in the whole band, and the best one is 22.9 dB.