Results 71 to 80 of about 7,286,512 (152)

Design and Analysis of an Ultra-Wideband High-Precision Active Phase Shifter in 0.18 μm SiGe BiCMOS Technology

Journal of Low Power Electronics and Applications
This paper presents an active phase shifter for phased array system applications, implemented using 0.18 μm SiGe BiCMOS technology. The phase shifter circuit consists of a wideband quadrature signal generator, a vector modulator, an input balun, and an ...
Hao Jiang, Zenglong Zhao, Nengxu Zhu, Fanyi Meng   +3 more
doaj   +1 more source

An improved recycling folded cascode amplifier with gain boosting and phase margin enhancement

, 2015
An improved recycling folded cascode operational transconductance amplifier with gain boosting and enhanced phase-margin is proposed. Among four variants of folded cascode amplifiers that have been implemented in TSMC 0.18μm CMOS process under same power
Amine Bermak, Fang Tang, Shah, Ikramullah, Bermak, Amine, Ahmed, Moaaz, Ikramullah Shah, Moaaz Ahmed, Tang, Fang   +7 more
core   +1 more source

Phase sensitive amplification in a highly nonlinear lead-silicate fibre

We experimentally demonstrate phase-sensitive amplification in a highly nonlinear lead-silicate W-type fibre. A phase-sensitive gain swing of 6dB was observed in a 1.56m sample of the fibre for a total launched power of ...
Shi, J.D., Petropoulos, P., Richardson, D.J., Poletti, F., Kakande, J., Loh, W.H., Ettabib, M.A., Petrovich, M.N., Ponzo, G.M., Jones, L., Slavík, R., Parmigiani, F., Feng, X.   +12 more
core   +1 more source

Offset and Gain error-compensated Low-Voltage Unity-Gain-Reset Switched-Capacitor Non-inverse Amplifier [PDF]

In this paper, it is presented that a Offset and Gain error-compensated Low-Voltage Unity-Gain-Reset Switched-Capacitor Non-inverse Amplifier. The proposed circuit can operate using simple nonoverlapping three phase clocks.
Murao, Kenji, 大野, 憲司, 773, Ohno, Kenji, 11928, マツモト, ヒロキ, 村尾, 健次, 11927, ムラオ, ケンジ, オオノ, ケンジ, 松本, 寛樹, Matsumoto, Hiroki   +11 more
core  

Numerical analysis of a relaxed variational model of hysteresis in two-phase solids [PDF]

, 2001
This paper presents the numerical analysis for a variational formulation of rate-independent phase transformations in elastic solids due to Mielke et al.
Carstensen, Carsten, Carsten Carstensen, Plechac, Petr, Petr Plecháč   +3 more
core   +1 more source

Permanent-Magnet Synchronous Motor Sensorless Control Using Proportional-Integral Linear Observer with Virtual Variables: A Comparative Study with a Sliding Mode Observer

Energies, 2019
Quick convergence, simple implementation, and accurate estimation are essential features of realizing permanent-magnet synchronous motor (PMSM) position estimation for sensorless control using microcontrollers. A linear observer is often designed on real
Baochao Wang, Yangrui Wang, Liguo Feng, Shanlin Jiang, Qian Wang, Jianhui Hu   +5 more
doaj   +1 more source

A 7-Bit Vector-Sum Phase Shifter for LEO Satellite Communication in 90-Nm CMOS Process

IEEE Access
This paper presents a 7-bit vector-sum phase shifter for low-earth-orbit satellite communication. The phase shifter consists of a differential-type quadrature all-pass filter (QAF) and an analog differential vector adder, where a matching network is ...
Hao-Jen Tu, Hsiao-Chin Chen, Pin-Hsuan Chen, Po-Yen Huang   +3 more
doaj   +1 more source

Direction-of-Arrival Estimation Based on Variational Bayesian Inference Under Model Errors

Remote Sensing
The current self-calibration approaches based on sparse Bayesian learning (SBL) demonstrate robust performance under uniform white noise conditions. However, their efficacy degrades significantly in non-uniform noise environments due to acute sensitivity
Can Wang, Kun Guo, Jiarong Zhang, Xiaoying Fu, Hai Liu   +4 more
doaj   +1 more source

Comments on “A revisit to the gain and phase margins of linear quadratic regulators” (multiple letters)

, 2001
Ulf Holmberg corrects an error in the paper: Zhang, C. and Fu, M. (1996). A revisit to the gain and phase margins of linear quadratic regulators. IEEE Transactions on Automatic Control, 41, 1527-1530.
M. Fu (4569547), U. Holmberg (19100531), Cishen Zhang (18924439)   +2 more
core   +1 more source

Modified Decision Feedback Equalizers for Nonlinearity Compensation in Coherent PAM4 Transmission System

Photonics
To address chromatic dispersion (CD) and nonlinear impairments in coherent optical four-level pulse amplitude modulation (PAM4) systems, we propose a magnitude-assisted decision feedback equalizer (MA-DFE).
Zhengxuan Li, Zheng Xin, Siyu Luo, Acai Tan, Bingyao Cao   +4 more
doaj   +1 more source