The Study of a Dual-Mode Ring Oscillator
Journal
IEEE Transactions on Circuits and Systems, Part II
Journal Volume
58
Journal Issue
4
Pages
210-214
Date Issued
2011-01
Author(s)
Z-Z Chen
Abstract
An analytical investigation of a dual-mode ring oscillator is presented. The ring oscillator is designed using a CMOS 0.18-μm technology with differential eight-stage delay cells employing auxiliary input devices. With a proper startup control, the oscillator operates in two different modes covering two different frequency bands. A nonlinear model, along with the linearization method, is used to obtain the transient and steady-state behaviors of the dual-mode ring oscillator. The analytical derivations are verified through HSPICE simulation. The oscillator operates at the frequency bands from 25 GHz and from 0.12 GHz, respectively.
Subjects
Fractional-N frequency synthesizer (FNFS); multiphase signals; ring oscillators; voltage-control oscillators (VCOs)
SDGs
Other Subjects
Electrical engineering; Electronics engineering; Analytical investigations; Different frequency; Fractional-N frequency synthesizers; Linearization methods; Multiphase signals; Ring oscillator; Steady-state behaviors; Voltage control oscillators; SPICE
Type
journal article