Title :
A tunable CMOS ring VCO in a wide frequency range
Author :
Zhang, Haipeng ; Li, Hao ; Wang, Yang
Author_Institution :
Key Lab. of RF Circuit & Syst., Hangzhou Dianzi Univ., Hangzhou, China
Abstract :
In this paper a tunable CMOS ring VCO (Voltage Controlled oscillator) is presented based on five-stage differential structure in a wide frequency range. The proposed VCO circuit is designed in CSMC 0.5μm CMOS process and simulated with Cadence Spectre. The power supply voltage is 5V. Simulation results indicate that the frequency is tuned from 10.85MHz to 148MHz when the control voltage varies from 1.2 V to 4.8V The phase noise is about -123.8dBc/Hz at 1MHz offset from carrier frequency of 80MHz. The proposed circuitry is simple and easy to be integrated and more suitable for correct timing logic ICs applications.
Keywords :
CMOS analogue integrated circuits; VHF oscillators; radiofrequency integrated circuits; voltage-controlled oscillators; CSMC CMOS process; Cadence Spectre; correct timing logic IC; five-stage differential structure; frequency 10.85 MHz to 148 MHz; size 0.5 mum; tunable CMOS ring VCO; voltage 1.2 V to 4.8 V; voltage 5 V; voltage controlled oscillator; CMOS integrated circuits; Delay; Phase noise; Tuning; Voltage control; Voltage-controlled oscillators; phase noise; ring VCO; wide frequency range;
Conference_Titel :
Multimedia Technology (ICMT), 2011 International Conference on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-61284-771-9
DOI :
10.1109/ICMT.2011.6002383
