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Journal Article A 12-GHz Fully Integrated Cascode CMOS LC VCO With Q-Enhancement Circuit
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Authors
Bong Hyuk Park, Seung Sik Lee, Sang Sung Choi, Song Cheol Hong
Issue Date
2008-02
Citation
IEEE Microwave and Wireless Components Letters, v.18, no.2, pp.133-135
ISSN
1531-1309
Publisher
IEEE
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1109/LMWC.2007.915136
Project Code
08MC2200, Development of UWB Solution for High Speed Multimedia Transmission, Sangsung Choi
Abstract
A fully integrated complementary metal oxide semiconductor (CMOS) cascode LC voltage controlled oscillator (VCO) with Q-enhancement technique has been designed for high frequency and low phase noise. The symmetrical cascode architecture is implemented with negative conductance circuit for improving phase noise performance in 0.18 μm CMOS technology. The measured phase noise is -110.8 dBc/Hz at the offset frequency of 1 MHz. The tuning range of 630 MHz is achieved with the control voltage from 0.6 to 1.4 V. The VCO draws 4.5 mA in a differential core circuit from 1.8 V supply. © 2008 IEEE.
KSP Keywords
CMOS Technology, Cascode CMOS, Complementary metal-oxide-semiconductor(CMOS), Core circuit, Fully integrated, High Frequency(HF), LC voltage controlled oscillator(LC-VCO), Low phase noise, Metal-oxide(MOX), Noise performance, Q-enhancement