SEMICONDUCTOR INTEGRATED CIRCUITS

A VCO sub-band selection circuit for fast PLL calibration

Song Ying, Wang Yuan, Jia Song and Zhao Baoying

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Abstract: A novel voltage controlled oscillator (VCO) sub-band selection circuit to achieve fast phase locked loop(PLL) calibration is presented, which reduces the calibration time by measuring the period difference directly and accomplishing an efficient search for an optimum VCO sub-band. The sub-band selection circuit was implementedin a 0.18 µm CMOS logic process with a PLL using an 8 sub-band VCO. The measured calibration time is less than 3 µs in a VCO frequency range from 600 MHz to 2 GHz. The proposed circuit consumes 0.64 mA at most.

Key words: PLLVCOcalibration

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    Received: 18 August 2015 Revised: 17 March 2009 Online: Published: 01 August 2009

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      Song Ying, Wang Yuan, Jia Song, Zhao Baoying. A VCO sub-band selection circuit for fast PLL calibration[J]. Journal of Semiconductors, 2009, 30(8): 085010. doi: 10.1088/1674-4926/30/8/085010 Song Y, Wang Y, Jia S, Zhao B Y. A VCO sub-band selection circuit for fast PLL calibration[J]. J. Semicond., 2009, 30(8): 085010. doi:  10.1088/1674-4926/30/8/085010.Export: BibTex EndNote
      Citation:
      Song Ying, Wang Yuan, Jia Song, Zhao Baoying. A VCO sub-band selection circuit for fast PLL calibration[J]. Journal of Semiconductors, 2009, 30(8): 085010. doi: 10.1088/1674-4926/30/8/085010

      Song Y, Wang Y, Jia S, Zhao B Y. A VCO sub-band selection circuit for fast PLL calibration[J]. J. Semicond., 2009, 30(8): 085010. doi:  10.1088/1674-4926/30/8/085010.
      Export: BibTex EndNote

      A VCO sub-band selection circuit for fast PLL calibration

      doi: 10.1088/1674-4926/30/8/085010
      • Received Date: 2015-08-18
      • Accepted Date: 2009-01-08
      • Revised Date: 2009-03-17
      • Published Date: 2009-07-31

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