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Wide-locking range ÷3 series-tuned injection-locked frequency divider

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Abstract

A new wide locking range series-tuned (ST) divide-by-3 injection-locked frequency divider (ILFD) using a standard 0.18 μm CMOS process is presented. The ÷3 ILFD circuit is realized with a ST cross-coupled n-core MOS LC-tank oscillator. Two direct-injection MOSFETs in series are used as a frequency doubler and a dynamic linear mixer to widen the locking range. The power consumption of the ILFD core is 10.56 mW. The divider’s free-running frequency is tunable from 3.529 to 3.828 GHz by tuning the varactor’s control bias, and at the incident power of 0 dBm the maximum locking range is 2.3 GHz (21.6 %), from the incident frequency 9.5 to 11.8 GHz. The operation range is 2.5 GHz (23.7 %), from 9.3 to 11.8 GHz.

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Acknowledgments

The authors would like to thank the Staff of CIC for the chip fabrication and measurement supports.

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Authors and Affiliations

  1. Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, ROC

    Sheng-Lyang Jang & Chun-Yu Chuang

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  1. Sheng-Lyang Jang
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  2. Chun-Yu Chuang
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Correspondence to Sheng-Lyang Jang.

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Jang, SL., Chuang, CY. Wide-locking range ÷3 series-tuned injection-locked frequency divider. Analog Integr Circ Sig Process 76, 111–116 (2013). https://doi.org/10.1007/s10470-013-0086-y

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  • DOI: https://doi.org/10.1007/s10470-013-0086-y

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