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34 results on '"Cen, Mingcan"'

5. Research and Design of CMOS Fully Differential Telescopic Operational Amplifier with Common Mode Feedback

Author

Pang, Zhongqiu, Jiang, Pinqun, Song, Shuxiang, Cen, Mingcan, Hutchison, David, Editorial Board Member, Kanade, Takeo, Editorial Board Member, Kittler, Josef, Editorial Board Member, Kleinberg, Jon M., Editorial Board Member, Mattern, Friedemann, Editorial Board Member, Mitchell, John C., Editorial Board Member, Naor, Moni, Editorial Board Member, Pandu Rangan, C., Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Terzopoulos, Demetri, Editorial Board Member, Tygar, Doug, Editorial Board Member, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Liu, Xiao, editor, Mrissa, Michael, editor, Zhang, Liang, editor, Benslimane, Djamal, editor, Ghose, Aditya, editor, Wang, Zhongjie, editor, Bucchiarone, Antonio, editor, Zhang, Wei, editor, Zou, Ying, editor, and Yu, Qi, editor

Published
2019
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7. Short-Term Electrical Load Forecasting Based on Fuzzy Logic Control and Improved Back Propagation Algorithm

Author

Wan, Lei, Liu, Junxiu, Qiu, Senhui, Cen, Mingcan, Luo, Yuling, Akan, Ozgur, Series editor, Bellavista, Paolo, Series editor, Cao, Jiannong, Series editor, Coulson, Geoffrey, Series editor, Dressler, Falko, Series editor, Ferrari, Domenico, Series editor, Gerla, Mario, Series editor, Kobayashi, Hisashi, Series editor, Palazzo, Sergio, Series editor, Sahni, Sartaj, Series editor, Shen, Xuemin Sherman, Series editor, Stan, Mircea, Series editor, Xiaohua, Jia, Series editor, Zomaya, Albert Y., Series editor, Hu, Jia, editor, Leung, Victor C. M., editor, Yang, Kun, editor, Zhang, Yan, editor, Gao, Jianliang, editor, and Yang, Shusen, editor

Published
2017
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21. Design of a high selectivity fractal antenna with triple band-notched characteristics

Author

Cen Mingcan, Song Shuxiang, Li Shun, and Yu Lihua

Subjects
Materials science, Acoustics, 020208 electrical & electronic engineering, Bandwidth (signal processing), 020206 networking & telecommunications, 02 engineering and technology, Interference (wave propagation), Fractal antenna, law.invention, Resonator, law, 0202 electrical engineering, electronic engineering, information engineering, Feed line, Wi-Fi, Standing wave ratio, Antenna (radio)
Abstract

In this paper, an UWB (ultra-wideband) fractal antenna with VSWR < 2 bandwidth of 1.2-10.8 GHz is proposed, covering the UWB spectrum (3.1-10.6 GHz). An extended C-shaped slit, a CIDCLIR (complementary interdigital capacitance loading loop resonator) and CIDCLIR with the extension line thereof are etched at the intersection of the feed line and the main radiation patch, and at the bottom and the right coplanar floor of the feeder, respectively. So that the antenna with the tripe band-notched characteristics, and the problem that the notch band is too wide to waste useful spectrum is solved, thus it has high selection filtering characteristics. Multiple notch bands are 2.4-2.6GHz, 5.05-5.8GHz, 7.83-8.44GHz, it can better filter out interference from 2.4G WLAN (Wireless Local Area Network), 5G WLAN, X-band uplink frequency, respectively. It has good radiation characteristics and certain practicability.

Published
2020

24. Research and Design of CMOS Fully Differential Telescopic Operational Amplifier with Common Mode Feedback

Author

Cen Mingcan, Pang Zhongqiu, Pinqun Jiang, and Song Shuxiang

Subjects
010302 applied physics, Operating point, Open-loop gain, Computer science, 020208 electrical & electronic engineering, Linearity, Phase margin, 02 engineering and technology, Switched capacitor, 01 natural sciences, law.invention, CMOS, law, 0103 physical sciences, Hardware_INTEGRATEDCIRCUITS, 0202 electrical engineering, electronic engineering, information engineering, Operational amplifier, Electronic engineering, Common-mode signal
Abstract

In the medium or low frequency cases, the performance such as the gain or bandwidth of the fully differential operational amplifier is not good. In this paper, a fully differential telescopic two-stage operational amplifier with two-stage common-mode feedback is designed by using TSMC 250 nm technology. The first stage operational amplifier is telescopic structure, while the second stage operational amplifier is common source structure. The inner structure of common-mode feedback is continuous-time common-mode feedback circuit, and the outer structure is switched capacitor CMFB structure. It has the advantages of high gain and good linearity. It overcomes the shortcomings of common mode feedback circuit in limiting the output swing. It can stabilize the DC operating point and improve the output swing effectively. Cadence Spectre simulation results show that the common mode feedback structure keeps the common mode level at 1.25 V, the open loop gain is 67.7 dB, the phase margin is 45°, and the unit gain bandwidth is 150.7 MHz under the 2.5 V supply voltage.

Published
2019

25. An Image Compression-Encryption Algorithm Based on Cellular Neural Network and Compressive Sensing

Author

Senhui Qiu, Yuling Luo, Liao Zhixian, Jia Lin, Jinjie Bi, Cen Mingcan, and Junxiu Liu

Subjects
Sequence, business.industry, Computer science, Chaotic, 020206 networking & telecommunications, 02 engineering and technology, Encryption, 01 natural sciences, Lissajous curve, Matrix (mathematics), Compressed sensing, Cellular neural network, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, business, 010301 acoustics, Algorithm, Image compression
Abstract

In this paper, an image encryption algorithm on the basis of cellular neural networks (CNN) and compressive sensing (CS) is proposed. Firstly, four CNN with hyper chaotic behavior is introduced to generate chaotic sequence. Then, the index of the sorted chaotic sequence is used to control the generation of measurement matrix in CS procedure. Moreover, Lissajous map is served to produce asymptotic deterministic random measurement matrix instead of the common random measurement matrix. In addition, the chaotic sequence is normalized to 8-bit integer to diffuse the result after applying CS operation on the plain image, and the image after compression and encryption is obtained. The simulation results and analysis verify the proposed algorithm owns good security and ideal performance.

Published
2018

29. Research and Analysis of Tunable Differential N-Path Band-Pass Filter.

Author

Song, Shuxiang, Liu, Guolun, Cen, Mingcan, and Cai, Chaobo

Subjects
BANDPASS filters, COMPLEMENTARY metal oxide semiconductors, IMPEDANCE matching, INSERTION loss (Telecommunication), TRANSMISSION zeros
Abstract

Traditional filters usually have low Q and gain values and it is difficult to adjust their center frequencies. Moreover, it is very complicated to analyze their transmission charateristics through conventional methods. Therefore, in this paper, a tunable differential N-path bandpass filter that uses a new adjoint network method to analyze the transmission characteristics of the differential N-path structure is proposed. The filter circuit adopts a novel circuit structure consisting of two differential N-path structures, two transconductance amplifiers and an off-chip transformer. The differential structure eliminates even harmonics, the transconductance amplifier increases the circuit gain and the off-chip transformer acts as a balun, improving the filter's Q value and achieving impedance matching. Unlike the traditional switching capacitance method used for analyzing the differential circuit structure, the method proposed in this paper does not involve complicated calculus operations. In fact, the method greatly simplifies these complex operations, and the transmission function of the circuit can be obtained through simple algebraic operations. The proposed filter was designed using TSMC 180 nm CMOS process. Simulation results for a differential four-path bandpass filter formed under 1.2 V supply voltage show that the gain of the filter is greater than 8.5 dB, the center frequency can be adjusted from 0.1 GHz to 1 GHz, the in-band insertion loss S11 is greater than 10 dB, the out-of-band IIP3 is greater than 10 dBm, the out-of-band rejection is 28 dB and the noise figure is less than 2.2 dB at f s = 3 0 0 MHz. [ABSTRACT FROM AUTHOR]

Published
2021
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