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检索条件"机构=Graduate Program in Mechatronics Engineering"

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Design and Performance Comparison of Current References for a 32-bit Microcontroller Using 22nm Technology 16

Design and Performance Comparison of Current References for ...

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16th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2025

作者： Barcelos, Eduardo A. Campagnucci, Pamela R. A. N. Munoz, Daniel M. Amaral, Wellington A. Haddad, Sandro A. P. Mechatronics Graduate Program Faculty of Technology Department of Mechanical Engineering Electronics Engineering Undergraduate Program University of Brasilia Faculty of Gama DF Brasilia Brazil

ISBN: (纸本)9798331522124

With the advancement of semiconductor technologies, the need for efficient power management solutions in integrated systems, such as RISC-V architecture-based microcontrollers, becomes increasingly critical. However, there is a lack of studies comparing current reference architectures in terms of performance and robustness, particularly in 22nm technologies. In this paper, we present a comparative analysis of two current reference designs implemented in the same technology-referred to as Reference Design A and Reference Design B. We focus on their approaches to thermal compensation, supply stability, and layout optimizations. Through simulations and experimental tests, we evaluate the performance of each design within a power management system that includes DC-DC converters and LDO regulators. Our results indicate that Design A exhibits superior power supply rejection with a PSRR of -85 dB, while Design B demonstrates enhanced energy efficiency and thermal stability, achieving a nominal current of 5.14 μA and a temperature coefficient of 16.21 ppm. These findings underscore the importance of balancing energy efficiency, thermal stability, and power supply variation rejection when selecting current references for low-power, high-reliability applications, such as those in the Internet of Things (IoT). © 2025 IEEE.

关键词： Integrated circuit layout

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A 22nm CMOS PFM Buck Converter Used in a 32-Bit RISC-V Microcontroller for IoT Applications 16

A 22nm CMOS PFM Buck Converter Used in a 32-Bit RISC-V Micro...

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16th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2025

作者： Oliveira, Luiz H. N. Amaral, Wellington A. Haddad, Sandro A. P. Munoz, Daniel M. Barcelos, Eduardo A. Sotero, Vinicius V. M. Jonhson, Emmanuel K. M. Campagnucci, Pamela R. A. N. Lima, Luis V. N. Electronics Engineering Undergraduate Program Faculty of Gama Brazil Mechatronics Graduate Program University of Brasilia Faculty of Technology Department of Mechanical Engineering DF Brasilia Brazil

ISBN: (纸本)9798331522124

The demand for efficient power management solutions in electronic devices has increased significantly, especially for microcontrollers operating in low-power modes. This article presents the design and implementation of a Pulse Frequency Modulation (PFM)-based buck converter for applications in 32-bit microcontrollers using 22nm CMOS technology. The methodology involves the development of a Constant On Time (COT) architecture that maintains a fixed duration for the activation of the high-side MOSFET, using a monostable multivibrator to generate the necessary timing signals. The converter's performance was simulated under various load conditions and process corners to evaluate its efficiency and output characteristics. The results show that the proposed buck converter achieves high efficiency, with peak values above 95%, while maintaining a low output ripple. Specifically, the converter exhibits an efficiency of 93.4% at a load of 1mA, with output ripple voltages as low as 2.20 mV under ideal conditions. The contributions of this work lie in the advancement of PFM converter technology for modern microcontroller applications, demonstrating the potential of 22nm CMOS processes to improve power efficiency and performance. © 2025 IEEE.

关键词： CMOS integrated circuits

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Design and Performance Comparison of Low Dropout Regulators for a 32-bit Microcontroller Using 22nm Technology 16

Design and Performance Comparison of Low Dropout Regulators ...

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16th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2025

作者： Johnson, Emmanuel K. M. Lima, Luis Victor N. Campagnucci, Pamela. R. A. N. Haddad, Sandro A. P. Amaral, Wellington A. Munoz, Daniel M. University of Brasilia Mechatronics Graduate Program Department of Mechanical Engineering DF Brasilia Brazil University of Brasilia Faculty of Gama Electronics Engineering Undergraduate Program DF Brasilia Brazil

ISBN: (纸本)9798331522124

This paper presents a comparison between two LDOs (Low Dropout Regulators) developed for a PMIC (Power Management Integrated Circuit) responsible for powering a 32-bit microcontroller based on the RISC-V microarchitecture, designed in 22 nm technology. The microcontroller will be integrated with a radio frequency interface for IoT (Internet of Things) applications. Two LDOs were designed: one with external compensation and the other a capacitor-less LDO. Both operate with an input voltage of 2.5V, an output voltage of 0.8V, and a maximum current of 150mA. The externally compensated LDO exhibited greater stability in response to load variations and a higher PSRR (Power Supply Rejection Ratio), while the capacitor-less LDO demonstrated faster regulation speed and occupied a chip area similar to the externally compensated LDO. © 2025 IEEE.

关键词： Low power electronics

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Design and Performance Comparison of Current References for a 32-bit Microcontroller Using 22nm Technology

Design and Performance Comparison of Current References for ...

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IEEE Latin American Symposium on Circuits and Systems (LASCAS)

作者： Eduardo A. Barcelos Pâmela R. A. N. Campagnucci Daniel M. Muñoz Wellington A. Amaral Sandro A. P. Haddad Department of Mechanical Engineering Faculty of Technology Mechatronics Graduate Program Faculty of Gama Electronics Engineering Undergraduate Program University of Brasilia Brasilia DF Brazil

ISBN: (数字)9798331522124

ISBN: (纸本)9798331522131

关键词： Resistance Microcontrollers Power system management Stability criteria Energy efficiency Robustness Circuit stability Thermal analysis Internet of Things Thermal stability

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A 22nm CMOS PFM Buck Converter Used in a 32-Bit RISC-V Microcontroller for IoT Applications

A 22nm CMOS PFM Buck Converter Used in a 32-Bit RISC-V Micro...

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IEEE Latin American Symposium on Circuits and Systems (LASCAS)

作者： Luiz H. N. Oliveira Wellington A. Amaral Sandro A. P. Haddad Daniel M. Muñoz Eduardo A. Barcelos Vinícius V. M. Sotero Emmanuel K. M. Jonhson Pâmela R. A. N. Campagnucci Luis V. N. Lima Department of Mechanical Engineering Faculty of Technology Mechatronics Graduate Program University of Brasilia Brasilia DF Brazil Faculty of Gama Electronics Engineering Undergraduate Program

ISBN: (数字)9798331522124

ISBN: (纸本)9798331522131

关键词： Semiconductor device modeling Performance evaluation MOSFET Buck converters Microcontrollers Power system management Multivibrators Timing Internet of Things Load modeling

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Design and Performance Comparison of Low Dropout Regulators for a 32-bit Microcontroller Using 22nm Technology

Design and Performance Comparison of Low Dropout Regulators ...

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IEEE Latin American Symposium on Circuits and Systems (LASCAS)

作者： Emmanuel K. M. Johnson Luis Victor N. Lima Pamela. R. A. N. Campagnucci Sandro A. P. Haddad Wellington A. Amaral Daniel M. Muñoz Department of Mechanical Engineering Mechatronics Graduate Program University of Brasilia Brasilia DF Brazil Faculty of Gama Electronics Engineering Undergraduate Program University of Brasilia Brasilia DF Brazil

ISBN: (数字)9798331522124

ISBN: (纸本)9798331522131

关键词： Regulators Microcontrollers Power supplies Power system management Simulation Stability analysis Regulation Circuit stability Internet of Things Voltage control

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Evaluation of a 429 MHz band multiple folded planar inverted-f antenna near the human body 9

Evaluation of a 429 MHz band multiple folded planar inverted...

引用

9th IEEE Global Conference on Consumer Electronics, GCCE 2020

作者： Muto, Kanata Fujii, Katsuyuki Okumura, Yasuyuki Nanzan University Graduate Program of Mechatronics Graduate School of Science and Engineering Nagoya Japan Nanzan University Department of Mechatronics Faculty of Science and Engineering Nagoya Japan

ISBN: (纸本)9781728198026

When mobile communication terminals are used, miniaturized antennas interact with the human body. For example, a planar inverted-F antenna, which is a typical small antenna, is the result of the application of various miniaturization techniques. In previous research, a multiple folded planer inverted-F antenna working at a 429 MHz band was proposed to be mounted on a housing. However, the evaluation of the performance of this equipment has not been established near the human body. Therefore, in this paper, its behavior is evaluated through simulation and measurement. The specific absorption rate is also evaluated through this simulation. © 2020 IEEE.

关键词： Microstrip antennas

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Evaluation of the electric field distribution during bending for wearable two-dimensional communication sheets in the 2.4-GHz band 8

Evaluation of the electric field distribution during bending...

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8th IEEE Global Conference on Consumer Electronics, GCCE 2019

作者： Uda, Ibuki Fujii, Katsuyuki Okumura, Yasuyuki Graduate Program of Mechatronics Graduate School of Science and Engineering Nanzan University Nagoya Japan Faculty of Science and Engineering Nanzan University Department of Mechatronics Nagoya Japan

ISBN: (纸本)9781728135755

A communication medium known as a wearable two-dimensional communication sheet that can locate multiple small devices on clothes is being researched. By wearing the sheet, the desired communication may not be achieved because the sheet is bent owing to human movement. Therefore, in this study, we employ the finite-difference time-domain (FDTD) method to evaluate the electric field distribution inside the sheet in the 2.4-GHz band by considering the bending angle of the sheet to be a parameter. © 2019 IEEE.

关键词： Finite difference time domain method

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Evaluation of TCM to Coexisting OOK and PSK in optical access 8

Evaluation of TCM to Coexisting OOK and PSK in optical acces...

引用

8th IEEE Global Conference on Consumer Electronics, GCCE 2019

作者： Kuno, Yuki Okumura, Yasuyuki Fujii, Katsuyuki Graduate Program of Mechatronics Graduate School of Sience and Engineering Nanzan University Nagoya Japan Faculty of Science and Engineering Nanzan University Department of Mechatronics Nagoya Japan

ISBN: (纸本)9781728135755

Studies for enhancing network speed and capacity to handle the rapid increases in traffic are being conducted. Even in optical access, which is the backbone network, studies on next generation modulation schemes that utilize phase and amplitude, rather than modulation by conventional light intensity, are being conducted. However, it is difficult to update all the terminals at once, and there is a possibility that signals with old and new modulation schemes coexist on one optical fiber. Such situations are known to yield high error rates. Therefore, this study evaluates the effectiveness of TCM (Trellis Coded Modulation), which is an error correcting scheme. © 2019 IEEE.

关键词： Phase shift keying

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Superposition of Next Generation PON to Existing PON's OOK Signals 8

Superposition of Next Generation PON to Existing PON's OOK S...

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8th IEEE Global Conference on Consumer Electronics, GCCE 2019

作者： Ogawa, Shoki Okumura, Yasuyuki Fujii, Katsuyuki Graduate Program of Mechatronics Graduate School of Sience and Engineering Nanzan University Nagoya Japan Faculty of Science and Engineering Nanzan University Department of Mechatronics Nagoya Japan

ISBN: (纸本)9781728135755

Recent research into raising the speed and capacity of optical access networks has focused on converting RF (Radio Frequency) signals into optical signals. One approach to efficient transmission, combining wide spread OOK (ON-OFF Keying) systems with phase modulation, is being actively researched. However, studies to date have considered only the downlink. This paper focuses on the uplink of optical access networks and proposes a method for demodulating superimposed OOK and phase modulation signals. © 2019 IEEE.

关键词： Amplitude shift keying

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