Title :
Shunt-Feedback Ring Oscillator: a New Topology for Wideband Multiphase Signal Generations
Author :
Yodprasit, Uroschanit ; Botteron, Cyril ; Farine, Pierre-André ; Heubi, Alexander
Author_Institution :
Univ. of Neuchatel, Neuchatel
Abstract :
A negative-feedback scheme is applied to the gain stage of RC and LC ring oscillators to extend the frequency tuning range and to enhance the maximum oscillation frequency, respectively. This can be achieved without penalties in power consumption, supply voltage and silicon area. To verify the operation of the proposed topology, the theory of a three-stage shunt-feedback ring oscillator has been developed and compared with simulation results. Differential versions of 1.2-V shunt-feedback RC and LC ring oscillators operating, respectively, at 5 GHz and 11.6 GHz are demonstrated by simulations using a 0.18-mum CMOS technology.
Keywords :
CMOS analogue integrated circuits; MMIC oscillators; RC circuits; feedback oscillators; signal generators; CMOS technology; LC ring oscillators; RC ring oscillator; frequency 11.6 GHz; frequency 5 GHz; frequency tuning range; gain stage; maximum oscillation frequency; negative-feedback scheme; size 0.18 mum; three-stage shunt-feedback ring oscillator; voltage 1.2 V; wideband multiphase signal generations; CMOS technology; Energy consumption; Frequency; Power supplies; Ring oscillators; Signal generators; Topology; Tuning; Voltage; Wideband;
Conference_Titel :
Radio-Frequency Integration Technology, 2007. RFIT 007. IEEE International Workshop on
Conference_Location :
Rasa Sentosa Resort
Print_ISBN :
978-1-4244-1307-2
Electronic_ISBN :
978-1-4244-1308-9
DOI :
10.1109/RFIT.2007.4443925
