A transformer‐based injection‐locked frequency divider

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 ω0 and 3ω0 to enhance the injection efficiency, therefore, the locking range is enlarged. Besides, the divider contains a buffer for...

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Bibliographic Details
Published in:Microwave and optical technology letters 2021-10, Vol.63 (10), p.2565-2569
Main Authors: Wan, Cao, Wu, Liang, Zhu, Haoshen, Xu, Taotao, Xue, Quan
Format: Article
Language:English
Subjects:
CMOS
divide‐by‐four
fourth‐order resonator
Frequency dividers
injection efficiency
injection locking
Locking
Power consumption
transformer
Transformers
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Summary: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 ω0 and 3ω0 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 mm2, 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.
ISSN:0895-2477
1098-2760
DOI:10.1002/mop.32924