IEICE TRANSACTIONS on Electronics
A Compact TF-Based LC-VCO with Ultra-Low-Power Operation and Supply Pushing Reduction for IoT Applications
Summary :
This paper presents a miniaturized transformer-based ultra-low-power (ULP) LC-VCO with embedded supply pushing reduction techniques for IoT applications in 65-nm CMOS process. To reduce the on-chip area, a compact transformer patterned ground shield (PGS) is implemented. The transistors with switchable capacitor banks and associated components are placed underneath the transformer, which further shrinking the on-chip area. To lower the power consumption of VCO, a gm-stacked LC-VCO using the transformer embedded with PGS is proposed. The transformer is designed to provide large inductance to obtain a robust start-up within limited power consumption. Avoiding implementing an off/on-chip Low-dropout regulator (LDO) which requires additional voltage headroom, a low-power supply pushing reduction feedback loop is integrated to mitigate the current variation and thus the oscillation amplitude and frequency can be stabilized. The proposed ULP TF-based LC-VCO achieves phase noise of -114.8dBc/Hz at 1MHz frequency offset and 16kHz flicker corner with a 103µW power consumption at 2.6GHz oscillation frequency, which corresponds to a -193dBc/Hz VCO figure-of-merit (FoM) and only occupies 0.12mm2 on-chip area. The supply pushing is reduced to 2MHz/V resulting in a -50dBc spur, while 5MHz sinusoidal ripples with 50mVPP are added on the DC supply.
- Publication
- IEICE TRANSACTIONS on Electronics Vol.E103-C No.10 pp.505-513
- Publication Date
- 2020/10/01
- Publicized
- 2020/04/15
- Online ISSN
- 1745-1353
- DOI
- 10.1587/transele.2019CTP0005
- Type of Manuscript
- Special Section PAPER (Special Section on Analog Circuits and Their Application Technologies)
- Category
- Electronic Circuits
Authors
Zheng SUN
Tokyo Institute of Technology
Dingxin XU
Tokyo Institute of Technology
Hongye HUANG
Tokyo Institute of Technology
Zheng LI
Tokyo Institute of Technology
Hanli LIU
Tokyo Institute of Technology
Bangan LIU
Tokyo Institute of Technology
Jian PANG
Tokyo Institute of Technology
Teruki SOMEYA
Tokyo Institute of Technology
Atsushi SHIRANE
Tokyo Institute of Technology
Kenichi OKADA
Tokyo Institute of Technology
Keyword
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Zheng SUN, Dingxin XU, Hongye HUANG, Zheng LI, Hanli LIU, Bangan LIU, Jian PANG, Teruki SOMEYA, Atsushi SHIRANE, Kenichi OKADA, "A Compact TF-Based LC-VCO with Ultra-Low-Power Operation and Supply Pushing Reduction for IoT Applications" in IEICE TRANSACTIONS on Electronics,
vol. E103-C, no. 10, pp. 505-513, October 2020, doi: 10.1587/transele.2019CTP0005.
Abstract: This paper presents a miniaturized transformer-based ultra-low-power (ULP) LC-VCO with embedded supply pushing reduction techniques for IoT applications in 65-nm CMOS process. To reduce the on-chip area, a compact transformer patterned ground shield (PGS) is implemented. The transistors with switchable capacitor banks and associated components are placed underneath the transformer, which further shrinking the on-chip area. To lower the power consumption of VCO, a gm-stacked LC-VCO using the transformer embedded with PGS is proposed. The transformer is designed to provide large inductance to obtain a robust start-up within limited power consumption. Avoiding implementing an off/on-chip Low-dropout regulator (LDO) which requires additional voltage headroom, a low-power supply pushing reduction feedback loop is integrated to mitigate the current variation and thus the oscillation amplitude and frequency can be stabilized. The proposed ULP TF-based LC-VCO achieves phase noise of -114.8dBc/Hz at 1MHz frequency offset and 16kHz flicker corner with a 103µW power consumption at 2.6GHz oscillation frequency, which corresponds to a -193dBc/Hz VCO figure-of-merit (FoM) and only occupies 0.12mm2 on-chip area. The supply pushing is reduced to 2MHz/V resulting in a -50dBc spur, while 5MHz sinusoidal ripples with 50mVPP are added on the DC supply.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.2019CTP0005/_p
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@ARTICLE{e103-c_10_505,
author={Zheng SUN, Dingxin XU, Hongye HUANG, Zheng LI, Hanli LIU, Bangan LIU, Jian PANG, Teruki SOMEYA, Atsushi SHIRANE, Kenichi OKADA, },
journal={IEICE TRANSACTIONS on Electronics},
title={A Compact TF-Based LC-VCO with Ultra-Low-Power Operation and Supply Pushing Reduction for IoT Applications},
year={2020},
volume={E103-C},
number={10},
pages={505-513},
abstract={This paper presents a miniaturized transformer-based ultra-low-power (ULP) LC-VCO with embedded supply pushing reduction techniques for IoT applications in 65-nm CMOS process. To reduce the on-chip area, a compact transformer patterned ground shield (PGS) is implemented. The transistors with switchable capacitor banks and associated components are placed underneath the transformer, which further shrinking the on-chip area. To lower the power consumption of VCO, a gm-stacked LC-VCO using the transformer embedded with PGS is proposed. The transformer is designed to provide large inductance to obtain a robust start-up within limited power consumption. Avoiding implementing an off/on-chip Low-dropout regulator (LDO) which requires additional voltage headroom, a low-power supply pushing reduction feedback loop is integrated to mitigate the current variation and thus the oscillation amplitude and frequency can be stabilized. The proposed ULP TF-based LC-VCO achieves phase noise of -114.8dBc/Hz at 1MHz frequency offset and 16kHz flicker corner with a 103µW power consumption at 2.6GHz oscillation frequency, which corresponds to a -193dBc/Hz VCO figure-of-merit (FoM) and only occupies 0.12mm2 on-chip area. The supply pushing is reduced to 2MHz/V resulting in a -50dBc spur, while 5MHz sinusoidal ripples with 50mVPP are added on the DC supply.},
keywords={},
doi={10.1587/transele.2019CTP0005},
ISSN={1745-1353},
month={October},}
Copy
TY - JOUR
TI - A Compact TF-Based LC-VCO with Ultra-Low-Power Operation and Supply Pushing Reduction for IoT Applications
T2 - IEICE TRANSACTIONS on Electronics
SP - 505
EP - 513
AU - Zheng SUN
AU - Dingxin XU
AU - Hongye HUANG
AU - Zheng LI
AU - Hanli LIU
AU - Bangan LIU
AU - Jian PANG
AU - Teruki SOMEYA
AU - Atsushi SHIRANE
AU - Kenichi OKADA
PY - 2020
DO - 10.1587/transele.2019CTP0005
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E103-C
IS - 10
JA - IEICE TRANSACTIONS on Electronics
Y1 - October 2020
AB - This paper presents a miniaturized transformer-based ultra-low-power (ULP) LC-VCO with embedded supply pushing reduction techniques for IoT applications in 65-nm CMOS process. To reduce the on-chip area, a compact transformer patterned ground shield (PGS) is implemented. The transistors with switchable capacitor banks and associated components are placed underneath the transformer, which further shrinking the on-chip area. To lower the power consumption of VCO, a gm-stacked LC-VCO using the transformer embedded with PGS is proposed. The transformer is designed to provide large inductance to obtain a robust start-up within limited power consumption. Avoiding implementing an off/on-chip Low-dropout regulator (LDO) which requires additional voltage headroom, a low-power supply pushing reduction feedback loop is integrated to mitigate the current variation and thus the oscillation amplitude and frequency can be stabilized. The proposed ULP TF-based LC-VCO achieves phase noise of -114.8dBc/Hz at 1MHz frequency offset and 16kHz flicker corner with a 103µW power consumption at 2.6GHz oscillation frequency, which corresponds to a -193dBc/Hz VCO figure-of-merit (FoM) and only occupies 0.12mm2 on-chip area. The supply pushing is reduced to 2MHz/V resulting in a -50dBc spur, while 5MHz sinusoidal ripples with 50mVPP are added on the DC supply.
ER -
English
