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IEEE Biomedical Circuits and systems (BIOCAS)

作者： Shuo Guan Jingren Gu Zhonghan Shen Junyu Wang Yue Huang Andrew Mason State Key Laboratory of ASIC and System Fudan University Shanghai China Department of Electrical and Computer Engineering Michigan State University East Lansing USA

An implantable passive radio frequency identification (RFID) sensor tag system-on-chip (SoC) for glucose monitoring is developed in this paper. A high frequency RFID tag, a bio-sensor interface, as well as the electrodes are included in this chip. The signal of blood sugar level from the bio-sensor is detected and converted into digital data, and then the data is encrypted and transmitted to an RFID reader on top of the skin. To measure the weak current signals, a current readout circuit, a current splitter, an ADC and a potentiostat are designed in the chip. Correlated double sample (CDS) technology is used in the readout circuit to reduce the 1/f noise and the op-amp's offset. The chip is taped out in SMIC 0.13 μm CMOS process. Simulation results show that the system can measure weak current signals in the range of 10 fA-100 pA.

关键词： Baseband Sugar Rectifiers system-on-a-chip Clocks Current measurement Radiofrequency identification

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Diagram representations of charge pumping processes in CMOS transistors

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Journal of Semiconductors 2010年第8期31卷 53-59页

作者：黄新运焦广泛沈忱曹伟黄大鸣李名复 State Key Laboratory of ASIC & System Department of MicroelectronicsFudan University SNDL ECE DepartmentNational University of Singapore

A diagram representation method is proposed to interpret the complicated charge pumping（CP） processes. The fast and slow traps in CP measurement are *** phenomena such as CP pulse rise/fall time dependence, frequency dependence,the voltage dependence for the fast and slow traps,and the geometric CP component are clearly illustrated at a glance by the diagram *** the slow trap CP measurement,there is a transition stage and a steady stage due to the asymmetry of the electron and hole capture,and the CP current is determined by the lower capturing electron or hole *** method is used to discuss the legitimacy of the newly developed modified charge pumping method.

关键词： charge pumping interface-trap generation bias temperature instability modified CP oxide charge

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Nanoscale control of domain arrangements in Pb(Zr0.3,Ti 0.7)O3 ferroelectric films

Nanoscale control of domain arrangements in Pb(Zr0.3,Ti 0.7)...

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作者： Shen, Zhen-Kui Lu, Qian Chen, Zhi-Hui Jiang, An-Quan Qiu, Zhi-Jun Qu, Xin-Ping Chen, Yi-Fang Liu, Ran State Key Lab of ASIC and System Fudan University Shanghai 200433 China China Department of Material Science Fudan University Shanghai 200433 China China Rutherford Appleton Laboratory Chilton Didcot Oxfordshire OX11 0QX UK United Kingdom Nanoscience and Nanotechnology Micro and Nanotechnology Centre Rutherford Appleton Laboratory Oxfordshire United Kingdom School of Microelectronics Fudan University 220 Handan Road Shanghai China

Arrays of ferroelectric PZT nanostructures with lateral size down to 500 nm were fabricated using nanoembossing technique. The static distribution of domain configurations was investigated by Piezoresponse Force Microscopy (PFM). The observed presence of patterned domains following the patterned morphology suggests that nanoembossing could be used as a potential method for nanoscale control of domain arrangements in ferroelectrics nanostructures. © 2011 Elsevier B.V. All rights reserved.

关键词： Ferroelectricity

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A new method for multiparameter robust stability distribution analysis of linear analog circuits 11

A new method for multiparameter robust stability distributio...

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IEEE International Conference on Computer-Aided Design

作者： Changhao Yan Sheng-Guo Wang Xuan Zeng State Key Laboratory of ASIC & System Fudan University Shanghai China Department of ET / SIS University of North Carolina at Charlotte Charlotte USA

ISBN: (纸本)9781457713989

A correlation-first bisection method is proposed for analyzing the robust stability distribution of linear analog circuits in the multi-parameter space. This new method first transfers the complex multi-parameter robust stability problem into nonlinear inequalities by the Routh criterion, and then solves them by interval arithmetic and new bisection strategy. The axis with strong relationship to the functions dominating the stability is bisected. Furthermore, the Monte Carlo method is adopted for the uncertain subdomains to increase the convergence speed of bisection methods as the cube number increases. The proposed method has no error in both stable and unstable areas, and high efficiency to determine the complex boundaries between the stable and unstable areas. Numerical results validate this new method.

关键词： Circuit stability Stability criteria Numerical stability Robust stability Monte Carlo methods Analog circuits

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The theoretical and numerical models of a novel multi-wavelength source using a semiconductor ring laser

The theoretical and numerical models of a novel multi-wavele...

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OptoElectronics and Communications Conference, OECC

作者： Jiangbo Zhu Junwen Zhang Nan Chi Siyuan Yu State Key Laboratory of ASIC & System and Department of Communication Science and Engineering Fudan University Shanghai China Department of Electronic and Electrical Engineering University of Bristol Bristol UK

A novel concept of multi-wavelength source is presented. We have simulated the performance by numerically solving the multimode rate equations of the system. 7 carriers are obtained, with flatness less than 5 dB.

关键词： Mathematical model Cavity resonators Numerical models Laser modes Optical filters Laser theory Semiconductor lasers

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Study of enhanced biosensors based on 2-D sandwiched plasmon photonic crystals

Study of enhanced biosensors based on 2-D sandwiched plasmon...

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IEEE SENSORS

作者： J. Y. Zhang H. Huang X. M. Ji J. Zhou Y. P. Huang W. J. Xu J. Carlier B. Nongaillard ASIC and System State Key Laboratory Department of Microelectronics Fudan University Shanghai China Département Opto-Acousto-Electronique I.E.M.N. UMR CNRS 8520 Université de Valenciennes Valenciennes France

ISBN: (纸本)9781424492909

A novel sandwich structure of photonic crystal with periodic square array of hexagon holes was fabricated. The infrared optical properties in reflectance of the devices were tested. A sharp peak of surface plasmon resonance was observed at the incident angles of 30°. By the comparison of the results between non-sandwich structure and sandwich structure, the latter has higher sensitivity. This relative sensitivity of the optical biosensor has been enhanced by almost 300%.

关键词： Plasmons Optical surface waves Photonic crystals Biosensors Films Sandwich structures Surface waves

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A novel method to fabricate full-kerfed highfrequency (>100 MHz) ultrasonic array transducers

A novel method to fabricate full-kerfed highfrequency (>100 ...

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IEEE Symposium (IUS) Ultrasonics

作者： J. Y. Zhang X. M. Ji J. Zhou Y. P. Huang W. J. Xu J. Carlier J. M. Gao B. Nongaillard Department of Microelectronics ASIC and System State Key Laboratory Fudan University Shanghai China Département Opto-Acousto-Electronique I.E.M.N. UMR CNRS 8520 Université de Valenciennes Valenciennes France

ISBN: (纸本)9781457712531

High-frequency ultrasonic transducer arrays are essential for efficient imaging in clinical analysis and nondestructive evaluation (NDE). However, the fabrication of piezoelectric transducers is really a great challenge due to the small features in piezoelectric films. This paper describes a novel technique to fabricate thick-film ZnO ultrasonic array transducers. Piezoelectric elements are formed by sputtering thick-film ZnO onto etched features of a silicon substrate so that the difficult etching process for ZnO films is avoided by etching silicon. This process is simple and efficient. A 13-μm-pitch ZnO sandwich array is achieved with a thickness of 8 μm for 300 MHz. Finite element method is employed to calculate its electrical properties, including electrical impedance and crosstalk. The array is characterized by a network analyzer. The measured results are in good agreement with the theoretical predictions.

关键词： Zinc oxide Arrays Films Finite element methods Silicon Acoustics

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Simulation of Carrier Transport in Quantum Cascade Lasers

Simulation of Carrier Transport in Quantum Cascade Lasers

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2011 IEEE 9th International Conference on asic(2011年第九届IEEE国际专用集成电路大会)

作者： Yingying Li Guo-Ping Ru Z.-M. Simon Li State Key Laboratory of ASIC and System Department of Microelectronics Fudan University Shanghai Crosslight Software Inc. 121-3989 Henning Dr. Burnaby BC V5C 6P8 Canada

We report a simulation study of carrier transport in quantum cascade lasers (QCLs) based on non-local transport model. In this model, drift-diffusion equations are solved with modification of' current density by accounting for long-range carrier transport including quantum tunneling and hot carrier transport in the device. From the simulation results of an AlInGaAs/InP QCL at different temperatures, it is found that our model shows reasonable agreement with experiments at lower temperature when carriers are well confined while substantial deviation is observed at higher temperatures when the leakage of carriers into the continuum is significant.

关键词： Quantum cascade lasers Silicon Photodetectors

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Optical homodyne receiver utilizing image rejection in FSK/ASK re-modulation WDM-PON

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Chinese Optics Letters 2010年第9期8卷 906-908页

作者：方圆刘霄郑曦侯春宁方武良黄博李欣颖邹书敏张俊文邵宇丰迟楠 Department of Communication Science & Engineering State Key Laboratory of ASIC & System Fudan University

Optical frequency shift keying （FSK） homodyne detection utilizing image rejection in FSK/amplitude shift keying （ASK） re-modulation wavelength-division-multiplexed passive optical network （WDM-PON） is proposed and demonstrated. Image rejection is adopted to achieve better performance. We show the result in back-to-back and 40-km distance respectively and apparent improvement is obtained in the latter situation by using image rejection. Several factors which affect the image rejection receiver are analyzed in order to find out the optimum parameters. Result shows that the presented scheme is suitable for super long reach access network, especially for future metro access network.

关键词： Fiber optic networks Frequency shift keying Wavelength division multiplexing

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A Method to Build Reconfigurable Architectures by Extracting Common Subgraphs

A Method to Build Reconfigurable Architectures by Extracting...

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2011 IEEE 9th International Conference on asic(2011年第九届IEEE国际专用集成电路大会)

作者： Rui Zhang Tianyun Zhang Lingli Wang Yu Hu Software School Fudan University Shanghai 200433 China State Key Laboratory of ASIC & System Fudan University Shanghai 200433 China Electrical and Computer Engineering Department University of Alberta Canada

In this paper, we present a novel method to build reconfigurable architectures. Because an RTL description of a circuit can be converted to a data flow graph (DFG), our method is based on graph mining which aims to extract the common subgraphs among different benchmarks. A tool flow is proposed to convert benchmarks to data flow graphs and extract the common subgraphs. Benchmarks in the field of Error Checking and Correcting (ECC) are selected in the experiment to demonstrate that our method is correct and practical.

关键词： Logic gates Hardware design languages Manuals Internet Silicon Encyclopedias

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