Article
Computer Science, Information Systems
Sung-Hun Jo
Summary: This paper proposes a low-power current integrating infinite impulse response filter with a flat-passband for sensor read-out integrated circuits. In a current integrating filter, passband flatness degradation is unavoidable due to its sinc-like filtering characteristics. By introducing a high order infinite impulse response filter architecture, a flat-passband characteristic can be achieved. The implementation of this filter architecture with a flat passband can lower the required sampling frequency and subsequently reduce power consumption. Furthermore, the proposed high order infinite impulse response filter architecture provides a high degree of freedom in adjusting the weights of input samples. The integrated circuit is implemented in TSMC 65-nm CMOS process and operates on a 1.2 V supply voltage.
Article
Chemistry, Physical
Zhihao Zhang, Guangqin Gu, Wenhe Zhang, Guangxiang Gu, Wanyu Shang, Yang Liu, Gang Cheng, Zuliang Du
Summary: The power management circuits (PMCs) of triboelectric nanogenerators (TENGs) are crucial for developing self-powered sensing systems with high energy storage efficiency. A study proposes general methods to improve the efficiency of PMCs by reducing diode-related energy loss. By using rectifier diodes with lower threshold voltage and developing a double loops power management circuit (DL-PMC) with fewer operating diodes, the energy loss of diodes is significantly reduced. The study also finds that the increasing trend of diode energy loss is slower than that of TENG's output energy, leading to a reduced energy loss ratio as the open-circuit voltage (Voc) increases.
Article
Engineering, Electrical & Electronic
Goncalo Almeida, Zhaochu Yang, Tao Dong, Paulo Mendes, Yumei Wen, Ping Li
Summary: This paper presents a current starved voltage-controlled oscillator (VCO) based on the standard 0.13-mu m CMOS process, incorporating a power management circuit (PMC) to generate an average periodic signal at 84.81 kHz. A voltage reference is implemented to ensure stable periodic signal output, utilizing subthreshold and deep triode MOSFETs. The proposed architecture achieves a linear sensitivity of 0.49%/V and a power consumption of 3.546 mu W at 3 V supply voltage, suitable for a time-control local oscillator in vibration energy harvesters.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Computer Science, Information Systems
Montree Kumngern, Fabian Khateb, Tomasz Kulej
Summary: This paper presents a low-voltage low-power current-mode third-order low-pass filter based on voltage second generation current conveyor (VCII), which has a wide input voltage range and nano-power consumption. The filter can operate as both current- and transimpedance-mode filters.
Article
Computer Science, Information Systems
Sung-Hun Jo
Summary: This article presents a gain-enhanced, low hardware complexity charge-domain read-out integrated circuit, achieved through sampled charge redistribution technique, saving die area and providing gain enhancement. The charge-domain discrete-time filter with inherent reconfigurability works effectively as an anti-aliasing filter.
Article
Engineering, Electrical & Electronic
Jung Sik Kim, Khurram Javed, Kyoung Hyun Min, Jeongjin Roh
Summary: This article presents a low-dropout regulator (LDO) for power-efficient IoT devices. The proposed LDO senses the load current and enters an ultra-low-power mode to enable a low-power system when the devices are in standby mode. The LDO switches between an ultra-low-power mode and an active mode, with the former turning off the core circuit to save power. The implementation and measurement of silicon LDO chips demonstrate the successful operation of the proposed scheme, achieving an extremely low-quiescent current and a superior figure-of-merit (FOM).
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Article
Engineering, Electrical & Electronic
Xubin Liu, Xinyu Chen, Mohammad Shahidehpour, Canbing Li, Qiuwei Wu, Yuhang Wu, Jinyu Wen
Summary: This study proposes an active fault current limitation (AFCL) method to reduce system fault currents during low-voltage ride-through (LVRT) by adjusting phase angles and injecting currents. The method also takes into account network impedance characteristics to enhance voltage support ability. Extensive tests have shown that the proposed AFCL method improves LVRT performance without increasing system fault currents.
IEEE TRANSACTIONS ON POWER DELIVERY
(2022)
Article
Computer Science, Information Systems
Stefan Pechmann, Timo Mai, Matthias Voelkel, Mamathamba K. Mahadevaiah, Eduardo Perez, Emilio Perez-Bosch Quesada, Marc Reichenbach, Christian Wenger, Amelie Hagelauer
Summary: An integrated read and programming circuit for RRAM cells with versatility in adapting to different cell properties was presented. The circuit is suitable for read and programming operations based on voltage pulses, and can distinguish up to eight different states, achieving digitization of analog memory values. The functionality of the circuit and system was proven through measurement results, with the ability to distinguish up to eight different states and an overall resistance ratio of 7.9.
Article
Chemistry, Physical
Fayang Wang, Meitong Zhou, Pengfan Wu, Lingxiao Gao, Xin Chen, Xiaojing Mu
Summary: This study employs a high-performance piezo-electric vibration energy harvester (PVEH) as a new intelligent equipment for smart grids, addressing the issues of inconvenient battery replacement, short lifespan, and environmental pollution caused by disposable batteries used in wireless sensor nodes. The results demonstrate that the PVEH achieves an output voltage of 0.7 V under a low activation acceleration, and it significantly reduces the charging time and enhances the charging efficiency. The energy harvesting conducted through the system enables intelligent monitoring of the sensor.
Article
Engineering, Electrical & Electronic
Xun Gao, Hongfei Wu, Shang Gao, Zuoqian Zhang, Yan Xing
Summary: This article proposes a novel two-stage pulsed power supply scheme, utilizing an intermediate bus capacitance and an interleaved half-bridge converter to balance power differences and reduce the value of the storage capacitance. Voltage feedforward control and current preregulation control are introduced to suppress input current fluctuations and improve efficiency.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Soumitra Pal, Dodla Divya, Wing-Hung Ki, Aminul Islam
Summary: The proposed radiation-hardened read-decoupled 12T (RHRD12T) SRAM cell demonstrates superior read stability, low hold power consumption, and high write ability compared to other contemporary cells. Additionally, it shows improved write delay performance and can tolerate the highest critical charge among comparison cells while being the least susceptible to single-event upsets, although at the cost of longer read delay.
INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
(2021)
Article
Energy & Fuels
Ahsan Nadeem, Hadeed Ahmed Sher, Ali Faisal Murtaza, Nisar Ahmed
Summary: The paper introduces a new method for estimating the short circuit current and open-circuit voltage of a photovoltaic system, which is validated through experiments and shown to have advantages such as accurate prediction of values at any point on the P-V curve and improved tracking efficiency compared to conventional methods.
Article
Engineering, Electrical & Electronic
Ming Xiao, Yifan Wang, Ruizhe Zhang, Qihao Song, Matthew Porter, Eric Carlson, Kai Cheng, Khai Ngo, Yuhao Zhang
Summary: This study presents a novel junction termination extension (JTE) technique with a graded charge profile for vertical GaN p-n diodes. The fabrication process does not require GaN etching and only involves a single-step implantation. The fabricated GaN p-n diodes exhibit high breakdown voltage and robust avalanche current density, making them suitable for various vertical GaN devices.
IEEE ELECTRON DEVICE LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Ren Xie, Hui Li
Summary: This article proposes an active fault current sharing strategy to improve the operation of circuit breakers in a medium-voltage DC system. By sharing fault current, the peak turn-off current of circuit breakers can be reduced, benefiting multiple circuit breakers in different fault scenarios. Experimental results from a downscaled test bed validate the effectiveness of the proposed FCS strategy.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Computer Science, Information Systems
Seyed Morteza Hosseini, Mohammad Hossein Maghami, Parviz Amiri, Mohamad Sawan
Summary: This paper introduces a low-power, single-stage, active rectifier based on a new charge-pump circuit for use in biomedical implants. The circuit rectifies AC input voltage to DC and amplifies the DC output voltage. Low-loss MOS switches are used for high power conversion efficiency, and two comparators eliminate reverse leakage current for improved power efficiency. The rectifier, implemented in a 0.18 μm standard CMOS technology, achieves 1.205 V output DC voltage from an AC input signal with a 3 kΩ load resistance at 13.56 MHz operating frequency.