Title :
The design of 5 GHz voltage controlled ring oscillator using source capacitively coupled current amplifier
Author :
Rui Tao ; Berroth, M.
Author_Institution :
Inst. of Electr. & Opt. Commun. Eng., Stuttgart Univ., Germany
Abstract :
A 5 GHz voltage controlled ring-oscillator (VCO) has been designed using 0.18 /spl mu/m CMOS technology. Source Capacitively Coupled Current Amplifier (SC3A) is adopted to realize this VCO. Because of the band-pass characteristic of the SC3A, this VCO exhibits the low noise performance with a large tuning range. It can operate from 4.3 GHz up to 6.1 GHz with a phase noise of about -85 dBc/Hz at 1 MHz frequency offset. For the 2 V supply voltage, the power consumption is about 80 mW.
Keywords :
CMOS analogue integrated circuits; MMIC amplifiers; circuit tuning; coupled circuits; field effect MMIC; integrated circuit noise; low-power electronics; phase noise; voltage-controlled oscillators; 0.18 micron; 2 V; 4.3 to 6.1 GHz; 5 GHz; 80 mW; CMOS technology; SC3A; band-pass characteristic; low noise performance; phase noise; power consumption; source capacitively coupled current amplifier; tuning range; voltage controlled ring oscillator; CMOS technology; Coupling circuits; Differential amplifiers; Optical amplifiers; Optical fiber communication; Phase noise; Resonance; Ring oscillators; Voltage control; Voltage-controlled oscillators;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Conference_Location :
Philadelphia, PA, USA
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1211046
