TY - GEN
T1 - A 201.8-dBc/Hz-FoMT Octave-Tuning-Range LC-VCO IC with a Self-Shifted Voltage-Controlled Novel Varactor in 45-nm CMOS SOI
AU - Fang, Mengchu
AU - Yoshimasu, Toshihiko
N1 - Funding Information:
ACKNOWLEDGMENT The authors would like to thank GLOBALFOUNDRIES for chip fabrication. This work is supported by VLSI Design and Education Center (VDEC), University of Tokyo in collaboration with Cadence Design Systems, Inc., Mentor Graphics, Inc., and Keysight Technologies Japan, Ltd.
Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - An octave-tuning-range LC-VCO IC with a novel varactor is presented in this paper. The novel varactor, which is controlled by a single analog voltage, consists of three parallel-connected Inversion-MOS (IMOS)-based varactors, a PMOSFET level shifter, and two NMOSFETs as variable resistors. The control voltage is level shifted and applied to the IMOS-based varactors to widen the capacitance variation. In addition, NMOSFETs acting as variable resistors are employed to further extend the tuning range. The proposed LC-VCO IC is designed, fabricated, and fully evaluated on wafer in 45-nm CMOS SOI technology. The measured tuning range and phase noise of the proposed LC-VCO IC are 74.2% (2.21 GHz to 4.82 GHz) and -140.13 dBc/Hz, respectively. The proposed LC-VCO IC has realized an excellent measured FoMT of 201.8 dBc/Hz under a maximum dc power consumption of only 2.57 mW.
AB - An octave-tuning-range LC-VCO IC with a novel varactor is presented in this paper. The novel varactor, which is controlled by a single analog voltage, consists of three parallel-connected Inversion-MOS (IMOS)-based varactors, a PMOSFET level shifter, and two NMOSFETs as variable resistors. The control voltage is level shifted and applied to the IMOS-based varactors to widen the capacitance variation. In addition, NMOSFETs acting as variable resistors are employed to further extend the tuning range. The proposed LC-VCO IC is designed, fabricated, and fully evaluated on wafer in 45-nm CMOS SOI technology. The measured tuning range and phase noise of the proposed LC-VCO IC are 74.2% (2.21 GHz to 4.82 GHz) and -140.13 dBc/Hz, respectively. The proposed LC-VCO IC has realized an excellent measured FoMT of 201.8 dBc/Hz under a maximum dc power consumption of only 2.57 mW.
KW - IMOS
KW - LC-VCO
KW - RFIC
KW - Varactor
KW - Wideband
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U2 - 10.1109/APMC52720.2021.9661757
DO - 10.1109/APMC52720.2021.9661757
M3 - Conference contribution
AN - SCOPUS:85124429969
T3 - Asia-Pacific Microwave Conference Proceedings, APMC
SP - 238
EP - 240
BT - 2021 IEEE Asia-Pacific Microwave Conference, APMC 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2021 IEEE Asia-Pacific Microwave Conference, APMC 2021
Y2 - 28 November 2021 through 1 December 2021
ER -