The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
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Des oscillateurs commandés en tension (VCO) en quadrature avec des architectures d'ajustement de phase à moyenne de poids de courant et à moyenne de poids de tension sont étudiés. Le réglage de phase égalise la fréquence d'oscillation à la fréquence de résonance LC. Les avantages de l'égalisation sont expliqués en utilisant l'équation du bruit de phase de Leeson et la fonction de sensibilité aux impulsions (ISF). Les VCO en quadrature dotés d'architectures à réglage de phase sont fabriqués à l'aide d'un CMOS TSMC 180 nm et affichent des performances à faible bruit de phase par rapport à un VCO différentiel conventionnel. L'analyse ISF et l'analyse des petits signaux montrent également que les inconvénients des architectures d'ajustement de phase à moyenne de poids de courant et d'ajustement de phase à moyenne de poids de tension sont respectivement l'effet de bruit de la source de courant et une grande capacité supplémentaire. Un circuit de réglage de la moyenne de tension avec une source suiveuse à son entrée atténue l'augmentation de la capacité.
Mamoru UGAJIN
Nippon Institute of Technology
Yuya KAKEI
Saizeriya Co., Ltd.
Nobuyuki ITOH
Okayama Prefectural University
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Mamoru UGAJIN, Yuya KAKEI, Nobuyuki ITOH, "A Study of Phase-Adjusting Architectures for Low-Phase-Noise Quadrature Voltage-Controlled Oscillators" in IEICE TRANSACTIONS on Electronics,
vol. E106-C, no. 2, pp. 59-66, February 2023, doi: 10.1587/transele.2022ECP5009.
Abstract: Quadrature voltage-controlled oscillators (VCOs) with current-weight-average and voltage-weight-average phase-adjusting architectures are studied. The phase adjusting equalizes the oscillation frequency to the LC-resonant frequency. The merits of the equalization are explained by using Leeson's phase noise equation and the impulse sensitivity function (ISF). Quadrature VCOs with the phase-adjusting architectures are fabricated using 180-nm TSMC CMOS and show low-phase-noise performances compared to a conventional differential VCO. The ISF analysis and small-signal analysis also show that the drawbacks of the current-weight-average phase-adjusting and voltage-weight-average phase-adjusting architectures are current-source noise effect and large additional capacitance, respectively. A voltage-average-adjusting circuit with a source follower at its input alleviates the capacitance increase.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.2022ECP5009/_p
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@ARTICLE{e106-c_2_59,
author={Mamoru UGAJIN, Yuya KAKEI, Nobuyuki ITOH, },
journal={IEICE TRANSACTIONS on Electronics},
title={A Study of Phase-Adjusting Architectures for Low-Phase-Noise Quadrature Voltage-Controlled Oscillators},
year={2023},
volume={E106-C},
number={2},
pages={59-66},
abstract={Quadrature voltage-controlled oscillators (VCOs) with current-weight-average and voltage-weight-average phase-adjusting architectures are studied. The phase adjusting equalizes the oscillation frequency to the LC-resonant frequency. The merits of the equalization are explained by using Leeson's phase noise equation and the impulse sensitivity function (ISF). Quadrature VCOs with the phase-adjusting architectures are fabricated using 180-nm TSMC CMOS and show low-phase-noise performances compared to a conventional differential VCO. The ISF analysis and small-signal analysis also show that the drawbacks of the current-weight-average phase-adjusting and voltage-weight-average phase-adjusting architectures are current-source noise effect and large additional capacitance, respectively. A voltage-average-adjusting circuit with a source follower at its input alleviates the capacitance increase.},
keywords={},
doi={10.1587/transele.2022ECP5009},
ISSN={1745-1353},
month={February},}
Copier
TY - JOUR
TI - A Study of Phase-Adjusting Architectures for Low-Phase-Noise Quadrature Voltage-Controlled Oscillators
T2 - IEICE TRANSACTIONS on Electronics
SP - 59
EP - 66
AU - Mamoru UGAJIN
AU - Yuya KAKEI
AU - Nobuyuki ITOH
PY - 2023
DO - 10.1587/transele.2022ECP5009
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E106-C
IS - 2
JA - IEICE TRANSACTIONS on Electronics
Y1 - February 2023
AB - Quadrature voltage-controlled oscillators (VCOs) with current-weight-average and voltage-weight-average phase-adjusting architectures are studied. The phase adjusting equalizes the oscillation frequency to the LC-resonant frequency. The merits of the equalization are explained by using Leeson's phase noise equation and the impulse sensitivity function (ISF). Quadrature VCOs with the phase-adjusting architectures are fabricated using 180-nm TSMC CMOS and show low-phase-noise performances compared to a conventional differential VCO. The ISF analysis and small-signal analysis also show that the drawbacks of the current-weight-average phase-adjusting and voltage-weight-average phase-adjusting architectures are current-source noise effect and large additional capacitance, respectively. A voltage-average-adjusting circuit with a source follower at its input alleviates the capacitance increase.
ER -