Title :
The design of 5 GHz voltage controlled ring oscillator using source capacitively coupled current amplifier
Author :
Tao, Rui ; Berroth, Manfred
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 μm 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 oscillators; circuit tuning; equivalent circuits; field effect MMIC; integrated circuit design; integrated circuit noise; phase noise; voltage-controlled oscillators; 0.18 micron; 2 V; 4.3 to 6.1 GHz; 5 GHz; 80 mW; CMOS technology; SC3A; VCO; band-pass characteristic; large tuning range; low noise performance; source capacitively coupled current amplifier; voltage controlled ring oscillator; CMOS technology; Circuits; Differential amplifiers; Optical amplifiers; Optical fiber communication; Phase noise; Resonance; Ring oscillators; Voltage control; Voltage-controlled oscillators;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2003 IEEE
Print_ISBN :
0-7803-7694-3
DOI :
10.1109/RFIC.2003.1214024
