A CMOS self-regulating VCO with low supply sensitivity

In Chul Hwang, Chulwoo Kim, Sung Mo Steve Kang

Research output: Contribution to journalArticlepeer-review

63 Citations (Scopus)


This paper presents a self-regulating voltage-controlled oscillator (VCO) with low supply sensitivity. With an adaptive delay cell, the self-regulating VCO achieves a low supply sensitivity of 0.15%-delay/1%-supply or less. This delay cell has a built-in compensation circuit that senses and corrects the delay variation caused by supply fluctuation. The proposed scheme rejects device noise as well and hence achieves a low phase noise of -101.4 dBc/Hz at 600-kHz offset when it runs at 900 MHz. The prototype phase-locked loop with the VCO fabricated in 0.35-μm CMOS process shows a cycle-to-cycle rms jitter of 2.1 ps at 450 MHz (VCO at 900 MHz) under quiet supply condition.

Original languageEnglish
Pages (from-to)42-48
Number of pages7
JournalIEEE Journal of Solid-State Circuits
Issue number1
Publication statusPublished - 2004 Jan


  • Low supply sensitivity
  • Phase noise
  • Phase-locked loop
  • Self-regulating
  • Voltage-controlled oscillator (VCO)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


Dive into the research topics of 'A CMOS self-regulating VCO with low supply sensitivity'. Together they form a unique fingerprint.

Cite this