24 GHz CMOS Frequency Source with Differential Colpitts Structure-Based Complementary VCO for Low Phase Noise

Sung-Sun CHOI; Han-Yeol YU; Yong-Hoon KIM

doi:10.1587/transele.E94.C.909

24 GHz CMOS Frequency Source with Differential Colpitts Structure-Based Complementary VCO for Low Phase Noise

Sung-Sun CHOI, Han-Yeol YU, Yong-Hoon KIM

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In this paper, a 24 GHz frequency source for low phase noise is presented in a 0.18 µm CMOS process. The 24 GHz frequency source chip is composed of a 12 GHz voltage controlled oscillator (VCO) and a 24 GHz balanced frequency doubler with class B gate bias. Compared to a conventional complementary VCO, the proposed 12 GHz VCO has phase noise improvement by using resistor current sources and substituting the nMOS cross-coupled pair in the conventional complementary VCO for a g_m-boosted nMOS differential Colpitts pair. The measured phase noise and fundamental frequency suppression are -107.17 dBc/Hz at a 1 MHz offset frequency and -20.95 dB at 23.19 GHz frequency, respectively. The measured frequency tuning range is from 23.19 GHz to 24.76 GHz drawing 2.72 mA at a supply voltage of 1.8 V not including an output buffer.

Publication: IEICE TRANSACTIONS on Electronics Vol.E94-C No.5 pp.909-912

Publication Date: 2011/05/01

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Online ISSN: 1745-1353

DOI: 10.1587/transele.E94.C.909

Type of Manuscript: BRIEF PAPER

Category: Microwaves, Millimeter-Waves

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Sung-Sun CHOI, Han-Yeol YU, Yong-Hoon KIM, "24 GHz CMOS Frequency Source with Differential Colpitts Structure-Based Complementary VCO for Low Phase Noise" in IEICE TRANSACTIONS on Electronics, vol. E94-C, no. 5, pp. 909-912, May 2011, doi: 10.1587/transele.E94.C.909.
Abstract: In this paper, a 24 GHz frequency source for low phase noise is presented in a 0.18 µm CMOS process. The 24 GHz frequency source chip is composed of a 12 GHz voltage controlled oscillator (VCO) and a 24 GHz balanced frequency doubler with class B gate bias. Compared to a conventional complementary VCO, the proposed 12 GHz VCO has phase noise improvement by using resistor current sources and substituting the nMOS cross-coupled pair in the conventional complementary VCO for a g_m-boosted nMOS differential Colpitts pair. The measured phase noise and fundamental frequency suppression are -107.17 dBc/Hz at a 1 MHz offset frequency and -20.95 dB at 23.19 GHz frequency, respectively. The measured frequency tuning range is from 23.19 GHz to 24.76 GHz drawing 2.72 mA at a supply voltage of 1.8 V not including an output buffer.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E94.C.909/_p

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@ARTICLE{e94-c_5_909,
author={Sung-Sun CHOI, Han-Yeol YU, Yong-Hoon KIM, },
journal={IEICE TRANSACTIONS on Electronics},
title={24 GHz CMOS Frequency Source with Differential Colpitts Structure-Based Complementary VCO for Low Phase Noise},
year={2011},
volume={E94-C},
number={5},
pages={909-912},
abstract={In this paper, a 24 GHz frequency source for low phase noise is presented in a 0.18 µm CMOS process. The 24 GHz frequency source chip is composed of a 12 GHz voltage controlled oscillator (VCO) and a 24 GHz balanced frequency doubler with class B gate bias. Compared to a conventional complementary VCO, the proposed 12 GHz VCO has phase noise improvement by using resistor current sources and substituting the nMOS cross-coupled pair in the conventional complementary VCO for a g_m-boosted nMOS differential Colpitts pair. The measured phase noise and fundamental frequency suppression are -107.17 dBc/Hz at a 1 MHz offset frequency and -20.95 dB at 23.19 GHz frequency, respectively. The measured frequency tuning range is from 23.19 GHz to 24.76 GHz drawing 2.72 mA at a supply voltage of 1.8 V not including an output buffer.},
keywords={},
doi={10.1587/transele.E94.C.909},
ISSN={1745-1353},
month={May},}

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TY - JOUR
TI - 24 GHz CMOS Frequency Source with Differential Colpitts Structure-Based Complementary VCO for Low Phase Noise
T2 - IEICE TRANSACTIONS on Electronics
SP - 909
EP - 912
AU - Sung-Sun CHOI
AU - Han-Yeol YU
AU - Yong-Hoon KIM
PY - 2011
DO - 10.1587/transele.E94.C.909
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E94-C
IS - 5
JA - IEICE TRANSACTIONS on Electronics
Y1 - May 2011
AB - In this paper, a 24 GHz frequency source for low phase noise is presented in a 0.18 µm CMOS process. The 24 GHz frequency source chip is composed of a 12 GHz voltage controlled oscillator (VCO) and a 24 GHz balanced frequency doubler with class B gate bias. Compared to a conventional complementary VCO, the proposed 12 GHz VCO has phase noise improvement by using resistor current sources and substituting the nMOS cross-coupled pair in the conventional complementary VCO for a g_m-boosted nMOS differential Colpitts pair. The measured phase noise and fundamental frequency suppression are -107.17 dBc/Hz at a 1 MHz offset frequency and -20.95 dB at 23.19 GHz frequency, respectively. The measured frequency tuning range is from 23.19 GHz to 24.76 GHz drawing 2.72 mA at a supply voltage of 1.8 V not including an output buffer.
ER -