Built-in jitter measurement circuit with calibration techniques for a 3-GHz clock generator

Kuo Hsing Cheng, Jen Chieh Liu, Chih Yu Chang, Shu Yu Jiang, Kai Wei Hong

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


This paper proposes a 3-GHz built-in jitter measurement (BIJM) circuit to measure clock jitter on high-speed transceivers and system-on-chip (SoC) systems. The proposed BIJM circuit adopts a high timing resolution and self-calibration techniques. To eliminate process variation effects in 3 GHz systems, this study proposes an auto-calibration technique for the self-refereed circuit and other calibration techniques for the time amplifier (TA) and vernier ring oscillator (VRO), respectively. These calibration techniques can reduce the timing resolution variation of the vernier ring oscillator and the gain variation of the TA by 66% and 65%, respectively. This reduces the timing resolution variation of BIJM by 60%. Because the vernier ring oscillator and time amplifier achieve a small timing resolution, the BIJM circuit does not need an additional jitter-free reference signal using the self-refereed circuit. This study fabricated the BIJM circuit using the UMC 90-nm CMOS process. The BIJM circuit has a power consumption measuring 11.4 mW, and its core area is 120 μm×320 μm. The BIJM circuit measured the Gaussian distribution jitter at a 1.8 ps timing resolution with a 3-GHz input clock frequency.

Original languageEnglish
Article number5497216
Pages (from-to)1325-1335
Number of pages11
JournalIEEE Transactions on Very Large Scale Integration (VLSI) Systems
Issue number8
StatePublished - Aug 2011


  • Auto-calibration
  • built-in jitter measurement (BIJM)
  • measurement error
  • time amplifier
  • vernier ring oscillator (VRO)


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