DocumentCode :
1365625
Title :
LC-VCO Design With Dual- 
, Boosted for RF Oscillation and Attenuated for LF Noise
Author :
Koukab, Adil
Author_Institution :
Swiss Fed. Inst. of Technol. in Lausanne (EPFL), Lausanne, Switzerland
Volume :
20
Issue :
12
fYear :
2010
Firstpage :
675
Lastpage :
677
Abstract :
A VCO topology with a high at RF and low gm at low frequencies (LF) is presented. A high gm(RF) improves start-up conditions, and a low gm(LF) enables a significant improvement of the phase noise and the power supply rejection. The VCO with a modified prescaler was implemented in 0.25 μm CMOS technology. The measured phase is at 1 MH offset, when the VCO works at 3 GHz and consumes 7.5 mW. The corresponding figure of merit is 189.2 dBc/Hz/mW.
Keywords :
CMOS analogue integrated circuits; MMIC oscillators; circuit oscillations; network topology; prescalers; voltage-controlled oscillators; CMOS technology; LC-VCO design; LF noise; RF oscillation; VCO topology; frequency 3 GHz; modified prescaler; phase noise; power 7.5 mW; power supply rejection; size 0.25 mum; Noise measurement; Phase noise; Thermal noise; Voltage-controlled oscillators; Flicker noise; phase noise; power supply rejection (PSR); thermal noise; voltage-controlled oscillator (VCO);
fLanguage :
English
Journal_Title :
Microwave and Wireless Components Letters, IEEE
Publisher :
ieee
ISSN :
1531-1309
Type :
jour
DOI :
10.1109/LMWC.2010.2087011
Filename :
5613952
Link To Document :
