The Design and Analysis of Dual-Delay-Path Ring Oscillators

Author

Chen, Zuow-Zun ; Lee, Tai-Cheng

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

58

Issue

3

fYear

2011

fDate

3/1/2011 12:00:00 AM

Firstpage

470

Lastpage

478

Abstract

A dual-operation-mode ring oscillator that employs dual-delay paths is presented. The two operation modes, referred to as the differential and common modes, have different output waveform characteristics and oscillation frequencies. A nonlinear model for the dual-delay-path ring oscillator and the analysis of the stability of each operation mode are proposed to confirm both simulation and measurement results. Furthermore, a method for operation-mode selection is presented. The differential four-stage dual-delay-path ring oscillator is fabricated in a 0.18-μm CMOS technology. Measurements show that the tuning ranges are from 1.77 to 1.92 GHz and from 1.01 to 1.055 GHz for differential- and common-mode operations, respectively.

Keywords

CMOS integrated circuits; oscillators; CMOS technology; common-mode operation; diffferential-mode operation; dual-delay-path ring oscillators; frequency 1.055 GHz to 1.92 GHz; operation-mode selection; oscillation frequency; output waveform characteristics; size 0.18 mum; Multiphase signals; phase-locked loops (PLLs); ring oscillators; voltage-control oscillators;

fLanguage

English

Journal_Title

Circuits and Systems I: Regular Papers, IEEE Transactions on

Publisher

ieee

ISSN

1549-8328

Type

jour

DOI

10.1109/TCSI.2010.2072390

Filename

5635370