A low-phase-noise CMOS ring oscillator with differential control and quadrature outputs

L. Dai, R. Harjani

Research output: Contribution to journalConference articlepeer-review

32 Scopus citations

Abstract

This paper presents a two-stage 3.3V ring VCO in a 0.35μm CMOS technology with differential control and quadrature outputs. The measured common mode noise rejection at 1MHz is 32dB better than for a single-ended control topology. It also has improved supply noise rejection which is 38dB better than conventional differential ring oscillator at 320MHz. The measured phase noise is -117dBc/Hz at a 1MHz offset from the 973MHz center frequency. Since the trend of low-voltage operation degrades oscillator phase noise, our design is particularly well suited for low voltage high performance systems.

Original languageEnglish (US)
Pages (from-to)134-138
Number of pages5
JournalProceedings of the Annual IEEE International ASIC Conference and Exhibit
StatePublished - Jan 1 2001
Event14th Annual IEEE International ASIC/SOC Conference- System-on-Chip in a Networked World- - Arlington, VA, United States
Duration: Sep 12 2001Sep 15 2001

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