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A Two-Stage Ring Oscillator in 0.13- \mu{\hbox {m}} CMOS for UWB Impulse Radio

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3 Author(s)
Fahs, B. ; ST-Ericsson, Colombelles ; Ali-Ahmad, W.Y. ; Gamand, P.

We present a two-stage digitally controlled ring oscillator designed mainly for impulse-radio ultra-wideband (UWB) applications. Each basic stage utilizes a local positive feedback, allowing to achieve steady oscillation at low current consumption levels, and to extend the frequency tuning over an ultra-wide range. The frequency tuning is achieved via the control of the tail resistor in each stage. The circuit is fabricated in a 0.13-mum CMOS technology. It features full UWB coverage at slightly higher than 1.3-V supply voltage, -121.7-dBc/Hz phase noise at a 5.6-GHz carrier, and 10-MHz offset, and less than 5-mW power consumption for the digitally controlled oscillator core alone at 10.18-GHz maximum frequency under 1.3-V supply voltage.

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:57 ,  Issue: 5 )

Date of Publication:

May 2009

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