Title :
7GHz voltage control ring oscillator for UWB applications
Author :
Rashidi, Negar ; Nabavi, Abdolreza ; Mehrabian, Maryam
Author_Institution :
Electr. Eng. Dept., Tarbiat Modares Univ., Tehran, Iran
Abstract :
This paper presents the design of a low-power 7 GHz two-stage VCO for UWB systems using a 0.13 ¿m CMOS technology with supply voltage of 1.2 V. Fully differential structure is utilized to achieve high substrate noise rejection and a new formula is derived which accurately estimates the VCO output frequency as a function of control voltage. The VCO has very large tuning range (4.22 GHz), covering the output frequency from 3.41 GHz to 7.63 GHz with control voltages of 0.1 V to 1.2 V. The power dissipation is about 7.48 mW and 4.39 mW when VCO operates at the highest and lowest frequency, respectively. The simulation result of phase noise is -84.87 dBc/Hz at 1 MHz frequency offset from the center frequency of 7 GHz.
Keywords :
CMOS analogue integrated circuits; MMIC oscillators; field effect MMIC; integrated circuit design; low-power electronics; phase locked loops; phase locked oscillators; phase noise; ultra wideband communication; voltage-controlled oscillators; CMOS technology; UWB applications; frequency 3.41 GHz to 7.63 GHz; high substrate noise rejection; phase locked loop; phase noise; power 4.39 mW; power 7.48 mW; size 0.13 mum; voltage 1.2 V; voltage control ring oscillator; Delay; Energy consumption; Frequency; Inverters; Phase locked loops; Phase noise; Ring oscillators; Tuning; Voltage control; Voltage-controlled oscillators; Phase Locked Loop (PLL); phase noise; ring oscillators; voltage controlled oscillators (VCO);
Conference_Titel :
Microelectronics, 2008. ICM 2008. International Conference on
Conference_Location :
Sharjah
Print_ISBN :
978-1-4244-2369-9
Electronic_ISBN :
978-1-4244-2370-5
DOI :
10.1109/ICM.2008.5393528
