Article
Green & Sustainable Science & Technology
Satyajeet Sahoo, G. Ramana Murthy, S. Ramesh, G. Anitha
Summary: This paper discusses the design of an optimized hybrid OTA using source degeneration and adaptive biasing for high frequency applications. By simplifying the circuit elements to reduce die area and power consumption, good results are achieved; using a memristor improves the linearity of the conventional CMOS OTA.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Computer Science, Hardware & Architecture
Masoud Soltani Zanjani, Ali Biabanifard
Summary: This study utilizes two differential stages to form a frequency compensation network, enhancing Miller effect to improve frequency response. The proposed three-stage amplifier demonstrates good performance in DC gain, gain bandwidth, phase margin, and power consumption.
JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS
(2023)
Article
Chemistry, Multidisciplinary
Antonio Lopez-Martin, Maria Pilar Garde, Jose M. Algueta-Miguel, Javier Beloso-Legarra, Ramon G. Carvajal, Jaime Ramirez-Angulo
Summary: Energy efficiency is crucial in the design of modern wireless amplifiers, and utilizing quasi-floating gate transistors is an effective approach to achieve this. Different QFG circuit design techniques have been illustrated to implement low-voltage, energy-efficient class AB amplifiers. A new super class AB QFG amplifier has been presented as a design example, with measurement results confirming its excellent small-signal and large-signal performance.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Electrical & Electronic
Gianluca Giustolisi, Gaetano Palumbo
Summary: This paper introduces a new procedure for designing a generic three-stage amplifier based on settling-time specifications. The procedure extends the analysis of settling-time from pure two- or three-pole amplifiers to a generic amplifier with one or two zeros, even in the right-half plane. The validity of the proposed approach is demonstrated through the design example of a three-stage CMOS amplifier suitable for switched-capacitor applications.
MICROELECTRONICS JOURNAL
(2021)
Proceedings Paper
Computer Science, Artificial Intelligence
M. Pilar Garde, Antonio Lopez-Martin, Jose M. Algueta-Miguel, Javier Beloso-Legarra, Jaime Ramirez-Angulo
Summary: A novel symmetrical cascode operational transconductance amplifier designed in a 130 nm CMOS process achieves high energy efficiency by utilizing super class AB techniques, current starving, and dynamic cascode biasing. The implementation of local common-mode feedback with two matched active resistors allows for optimization of small-signal and large signal performance for a specific load. Testing of a prototype chip demonstrates an average slew rate of 6.3 V/mu s and a GBW of 7.53 MHz for a 120 pF load, with a power consumption of 30 mu W.
2021 XXXVI CONFERENCE ON DESIGN OF CIRCUITS AND INTEGRATED SYSTEMS (DCIS21)
(2021)
Article
Computer Science, Hardware & Architecture
Juan Jesus Ocampo-Hidalgo, Jesus Ezequiel Molinar-Solis, Noe Oliva-Moreno, Victor Hugo Ponce-Ponce, Marco A. Ramirez-Salinas
Summary: This article introduces a new CMOS voltage follower with improved performance compared to traditional followers. The proposed follower has lower output impedance and better behavior, as demonstrated through circuit simulations and fabrication of a test cell.
IEEE CANADIAN JOURNAL OF ELECTRICAL AND COMPUTER ENGINEERING
(2021)
Article
Computer Science, Hardware & Architecture
Yue-Ming Wu, Yu-Hsien Kao, Ta-Shun Chu
Summary: This article introduces a frequency interleaved technique (FIT) for loss compensation in distributed amplifiers (DA) and a frequency-interleaved distributed amplifier (FIDA) for achieving high-gain and wide-bandwidth frequency response through distributed configuration. Experimental results show that the designed FIDA chip has high performance and compact size.
IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Daniel Schroegendorfer, Thomas Leitner
Summary: This article presents a novel broadband output stage for external RF front-end low-noise amplifiers, achieving excellent RF performance and adaptability to different frequency bands.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(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
Yuyi Shen, Jiachen Xu, Jinho Yi, Ethan Chen, Vanessa Chen
Summary: Radio-frequency fingerprinting-based authentication methods can enhance the security of IoT-enabled devices. By controlling hardware imperfections through small reconfigurable elements, RF fingerprints can be formed as a low overhead security measure for device authentication. A secure RF power amplifier and a convolutional neural network-based classifier are proposed to achieve rapid RF identification through combinatorial randomness and self-aware detection mechanisms.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2022)
Article
Chemistry, Multidisciplinary
Agata Romanova, Vaidotas Barzdenas
Summary: This paper presents the development of a detailed noise current model for a low-noise capacitive feedback transimpedance amplifier (TIA) in CMOS, including a spectral density model for input-related noise. The performance of the proposed model is evaluated through post-layout simulation, showing important noise components present in practical circuits that were previously omitted in known noise models.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Electrical & Electronic
A. Sheldon, L. Belostotski
Summary: This letter presents a cryo-CMOS low-noise amplifier (LNA) operating at 0.9-1.8 GHz. The LNA is built-in standard 65-nm CMOS and designed for highly integrated radio astronomy receivers. The measured cryogenic noise parameters confirm noise matching in the band and show that the LNA achieves its minimum noise temperature at the desired frequency range. The LNA operates at 20K, consumes 115 mW of power, and provides a gain of 37.2 +/- 2.4 dB with a noise temperature of 2.3 to 8.5 K and |S-11| <-10 dB.
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
(2022)
Article
Energy & Fuels
Ivailo Milanov Pandiev
Summary: This paper developed a simple PSpice macro-model to simulate the basic static and dynamic characteristics of monolithic power operational amplifiers operated with a single-supply voltage, with the accuracy of the model verified using the TDA2005 from ST Microelectronics. The simulation results were compared with experimental measurements, showing a relative error of less than 15% for the modeled large-signal parameters.
Article
Computer Science, Information Systems
Van-Son Trinh, Jung-Dong Park
Summary: A compact W-band power amplifier for automotive radar application was proposed in 65-nm CMOS technology, with efficient transformer-based matching networks. Operating at 1.3V, the implemented 77GHz PA achieved good performance, demonstrating high power density.
Article
Engineering, Electrical & Electronic
Kaisarbek Omirzakhov, Mohamad Hossein Idjadi, Tzu-Yung Huang, S. Alex Breitweiser, David A. A. Hopper, Lee C. C. Bassett, Firooz Aflatouni
Summary: In this paper, an integrated reconfigurable quantum control system is reported, which is used to find electron-spin resonance (ESR) frequency and perform Rabi, Ramsey, and Hahn-echo measurements for a nitrogen-vacancy (NV) center spin qubit in diamond. The chip can be programmed to synthesize an RF signal tunable from 1.6 to 2.6 GHz, which is modulated with a sequence of up to 4098 reconfigurable pulses with a pulse width and pulse-to pulse delay adjustable from 10 ns to 42 ms and 18 ns to 42 ms, respectively, at a resolution of 2.5 ns. The 180-nm CMOS chip is fabricated within a footprint of 3.02 mm(2) and has a power consumption of 80 mW.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Review
Computer Science, Artificial Intelligence
Elham Mahdipour, Chitra Dadkhah
ARTIFICIAL INTELLIGENCE REVIEW
(2014)
Article
Engineering, Electrical & Electronic
Amir Sabbagh Molahosseini, Keivan Navi, Chitra Dadkhah, Omid Kavehei, Somayeh Timarchi
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2010)
Article
Engineering, Electrical & Electronic
Amir Sabbagh Molahosseini, Chitra Dadkhah, Keivan Navi
IEICE ELECTRONICS EXPRESS
(2009)
Article
Computer Science, Information Systems
Amir Sabbagh Molahosseini, Chitra Dadkhah, Keivan Navi, Mohammad Eshghi
IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS
(2009)
Article
Robotics
Seyedhadi Hosseininejad, Chitra Dadkhahe
INTERNATIONAL JOURNAL OF ADVANCED ROBOTIC SYSTEMS
(2019)
Article
Computer Science, Artificial Intelligence
Manizheh GhaemiDizaji, Chitra Dadkhah, Henry Leung
APPLIED SOFT COMPUTING
(2020)
Article
Computer Science, Artificial Intelligence
Fatemeh Rezaimehr, Chitra Dadkhah
Summary: With the increasing amount of data, the use of recommender systems has increased, emphasizing the importance of recommendation quality for users. Most studies focus on collaborative filtering recommender systems, categorizing attack detection methods into clustering, classifying, feature extraction, and probabilistic approaches.
ARTIFICIAL INTELLIGENCE REVIEW
(2021)
Article
Automation & Control Systems
Manizheh GhaemiDizaji, Chitra Dadkhah, Henry Leung
Summary: This paper introduces an evolutionary PF based on OHDA to address the sample impoverishment issue, which repositions particles to improve estimation accuracy; the application of the resulting evolutionary particle filter in robot localization and SLAM can enhance algorithm performance; testing on the Victoria park dataset and other environments confirms the efficiency of applying OHDA to PF for improving estimation accuracy.
ENGINEERING APPLICATIONS OF ARTIFICIAL INTELLIGENCE
(2021)
Proceedings Paper
Computer Science, Theory & Methods
Fatemeh Rezaimehr, Chitra Dadkhah
Summary: Recommender systems, such as the Collaborative Filtering Recommendation System, are popular but vulnerable to fake user attacks. It is crucial to detect and remove fake users to maintain accuracy in recommendations. Many algorithms have been developed to detect attackers, but researchers need to inject attack types into datasets and then evaluate their methods.
2021 26TH INTERNATIONAL COMPUTER CONFERENCE, COMPUTER SOCIETY OF IRAN (CSICC)
(2021)
Article
Mathematics
N. Tohidi, C. Dadkhah
INTERNATIONAL JOURNAL OF NONLINEAR ANALYSIS AND APPLICATIONS
(2020)
Proceedings Paper
Computer Science, Theory & Methods
Alireza Bitarafan, Chitra Dadkhah
2019 5TH INTERNATIONAL CONFERENCE ON WEB RESEARCH (ICWR)
(2019)
Article
Computer Science, Information Systems
Seyed Mahmoud Anisheh, Named Abbasizadeh, Hossein Shamsi, Chitra Dadkhah, Kang-Yoon Lee
Proceedings Paper
Computer Science, Software Engineering
Mehrad Abdollahi, Chitra Dadkha
2018 2ND NATIONAL AND 1ST INTERNATIONAL DIGITAL GAMES RESEARCH CONFERENCE: TRENDS, TECHNOLOGIES, AND APPLICATIONS (DGRC)
(2018)
Proceedings Paper
Computer Science, Cybernetics
Manizheh GhaemiDizaji, Chitra Dadkhah, Henry Leung
2018 IEEE INTERNATIONAL CONFERENCE ON SYSTEMS, MAN, AND CYBERNETICS (SMC)
(2018)
