Article
Computer Science, Hardware & Architecture
Fabian Khateb, Tomasz Kulej, Meysam Akbari, Kea-Tiong Tang
Summary: This article presents the experimental results of a MI-OTA, which utilizes three linearization techniques to achieve extended linearity under low voltage supply. The MI-OTA operates in the subthreshold region, offers tunability, and consumes low power.
IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS
(2022)
Article
Chemistry, Analytical
Shaohua Zhou, Cheng Yang, Jian Wang
Summary: This paper conducts an experimental study to investigate the degradation of power amplifier (PA) specifications under different humidity conditions. The results show that the S-21 and output power decrease with an increase in humidity due to the decrease in oxide capacitance and increase in threshold voltage. This study provides guidance for designers in compensating for the degradation of PA specifications.
Article
Engineering, Electrical & Electronic
Hang Liu, Xi Zhu, Yisheng Wang, Kai Men, Kiat Seng Yeo
Summary: The developed 60 GHz fully-integrated 8-way power amplifier shows excellent performance characteristics, including high gain, linearity, and efficiency, while meeting all channel requirements specified in the IEEE 802.11ad standard.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2021)
Article
Engineering, Electrical & Electronic
Meng-Jie Hsiao, Cam Nguyen
Summary: This high-isolation fully integrated front-end module operates in the 26.5-36.2 GHz range and demonstrates excellent performance for 5G wireless systems. With low noise and high gain, it occupies a compact area of only 2.1 mm² on a single chip.
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
(2021)
Article
Computer Science, Hardware & Architecture
Meysam Akbari, Safwan Mawlood Hussein, Yasir Hashim, Fabian Khateb, Tomasz Kulej, Kea-Tiong Tang
Summary: This paper presents a highly efficient fully differential transconductance amplifier by combining traditional techniques and multiple input-to-output paths. The proposed circuit achieves larger dc gain and higher gain bandwidth product by using positive feedback, nonlinear tail current sources, and current mirror-based paths. Two flipped voltage-follower cells are employed for variable current sources and adaptive biasing. Experimental results show that the circuit has a GBW of 173.3 MHz, a dc gain of 72.7 dB, and an SR of 139.4 V/μs for a capacitive load of 2 x 5 pF. The proposed circuit consumes 619 μW of power under a supply voltage of 1.8 V.
IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Chen Yang, Ke Jin, Dongqin Mao, Xirui Zhu
Summary: This article investigates the configuration method of transmission line class-E power amplifier operating at GHz frequency and designs a power amplifier based on L-type matching network. The proposed configuration method is validated through experiments.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Computer Science, Information Systems
Jun-Da Chen, Meng-Kai Jian
Summary: This study presents a wideband down-conversion mixer chip covering the frequency range of 1-18-GHz. The design implements a multiband mixer which allows for circuit sharing, saving chip area, and reducing power consumption and cost. The mixer exhibits excellent performance characteristics such as low power consumption, high bandwidth, and high gain.
Article
Engineering, Electrical & Electronic
Sujin Park, Hyungil Chae, Seonghwan Cho
Summary: This article presents a fourth-order continuous-time bandpass-Delta Sigma capacitance-to-digital converter for full-CMOS sensors. The converter achieves ultrahigh-resolution and high-energy efficiency by employing continuous-time operation, bandpass-Delta Sigma modulation, and various optimization techniques for low power consumption and high gain. Implemented in 0.18 μm CMOS, the proposed converter outperforms the state-of-the-art in terms of resolution and figure-of-merit.
IEEE JOURNAL OF SOLID-STATE CIRCUITS
(2023)
Article
Engineering, Electrical & Electronic
Nuha Rhaffor, Wei Keat Ang, Mohamed Fauzi Packeer Mohamed, Jagadheswaran Rajendran, Norlaili Mohd Noh, Mohd Tafir Mustaffa, Mohd Hendra Hairi
Summary: The study aims to demonstrate the increasing demand for higher integration of wireless communication systems with higher data rate and lower power consumption due to the emergence of the Internet of Things (IoT) industry. The design of radio frequency power amplifier (PA) has become more challenging and crucial, with the presented PA design for 2.45 GHz IoT application showing good linearity and efficiency. At an operating frequency of 2.45 GHz, the PA is considered unconditionally stable, exhibiting good linearity up to 10 dBm output power without sacrificing efficiency.
MICROELECTRONICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Baichuan Chen, Ramesh K. Pokharel, Samundra K. Thapa, Nusrat Jahan, Adel Barakat
Summary: This letter presents a novel design of a V-band low phase noise voltage-controlled oscillator (VCO) using an integrated two-branches DGS resonator, which has a higher quality factor and shorter interconnects.
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Xiao Sun, Ke Huang, Xu Zhu, Huaizong Shao, Yong Wang, Pei-Ling Chi, Tao Yang
Summary: In this paper, a 2-10 GHz reconfigurable power amplifier (PA) with a power-added efficiency (PAE) of 30% and an output power of 2W is proposed. The PA circuit consists of two-stage amplifier transistors with reconfigurable matching networks. By dividing the frequency band into three sub-frequency bands using the reconfigurable matching networks, the proposed PA achieves high PAE and gain in each sub-frequency band, covering a multioctave bandwidth. The efficiency is further improved by using harmonic suppression in the low-band. Good agreement between simulation and measurement is obtained.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Article
Engineering, Electrical & Electronic
Michele Spasaro, Domenico Zito
Summary: This brief presents a novel low-power 30GHz LNA in 22nm FDSOI CMOS technology, which exhibits high gain and low noise figure with record power consumption. It is compact in size and energy-efficient.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Article
Engineering, Electrical & Electronic
J. Perez-Bailon, M. T. Sanz-Pascual, B. Calvo, N. Medrano
Summary: In this letter, a fully integrated configurable front-end for Impedance Spectroscopy (IS) is introduced. The circuit features fully differential in-phase and quadrature channels and provides high performance, compact topology, and low noise.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2022)
Article
Computer Science, Information Systems
Hsin-Chia Yang, Sung-Ching Chi
Summary: This study designs an E-Class power amplifier based on TSMC 0.18 micron process CMOSFET devices, which covers 2.4 to 7.1 GHz and shows high gain, low isolation, and wide applicable frequency range, while maintaining low noise figures at the center working frequencies.
JOURNAL OF INTERNET TECHNOLOGY
(2022)
Article
Computer Science, Information Systems
Hsin-Chia Yang, Sung-Ching Chi
Summary: This study presents the design and fabrication of an E-Class power amplifier using TSMC 0.18 micron process. The amplifier is optimized to cover a wide frequency range of 2.4 to 7.1 GHz, with promising results in terms of gain, isolation, and impedance matching.
JOURNAL OF INTERNET TECHNOLOGY
(2022)
