Abstract
This paper exploits the application of dual-resonance LC resonator in the design of wide-locking-range injection-locked frequency dividers (ILFDs). The tail-injection and direct-injection divide-by-3 ILFD circuits in a standard CMOS process are realized with a pair of cross-coupled nMOSFETs with a dual-resonance LC-resonator. The locking range enhancement techniques such as linear mixer and quality-factor degradation are used to design wide-locking range divide-by-3 ILFD. At the incident power of 0 dBm the locking range of the divide-by-3 ILFD is 4.6 GHz (43.3 %), from the incident frequency 8.3 to 12.9 GHz.
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Acknowledgments
The author would like to thank the Staff of the CIC for the chip fabrication and technical supports and the students San-Sheng Lin, Yi-Shan Fang, C.-Y. Chuang, and Guan-Jie Huang, who contributed to this work.
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Jang, SL. Divide-by-3 injection-locked frequency dividers using dual-resonance resonator. Analog Integr Circ Sig Process 85, 335–341 (2015). https://doi.org/10.1007/s10470-015-0607-y
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DOI: https://doi.org/10.1007/s10470-015-0607-y