An all-digital phase-locked loop for high-speed clock generation

Ching Che Chung*, Chen-Yi Lee

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

180 Scopus citations

Abstract

An all-digital phase-locked loop (ADPLL) for high-speed clock generation is presented in this brief. The proposed ADPLL architecture uses both a digital control mechanism and a ring oscillator and, hence, can be implemented with standard cells. The ADPLL implemented in a 0.3-μm one-poly-four-metal CMOS process can operate from 45 to 510 MHz and achieve worst case frequency acquisition in 46 reference clock cycles. The power dissipation of the ADPLL is 100 mW (at 500 MHz) with a 3.3-V power supply. From chip measurement results, the Pk-Pk jitter of the output clock is < 70 ps, and the root-mean-square jitter of the output clock is < 22 ps. A systematic way to design the ADPLL with the specified standard cell library is also presented in this brief. The proposed ADPLL can easily be ported to different processes in a short time. Thus, it can reduce the design time and design complexity of the ADPLL, making it very suitable for system-on-chip applications.

Original languageEnglish
Pages (from-to)347-351
Number of pages5
JournalIEEE Journal of Solid-State Circuits
Volume38
Issue number2
DOIs
StatePublished - 1 Feb 2003

Keywords

  • All-digital phase-locked loop (ADPLL)
  • Clock generator
  • Frequency synthesizer
  • HDL
  • Low jitter

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