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International Conference on Intelligent Control and Information Processing (ICICIP)

作者： Wei Pei Yongying Zhu Zheng Xu Chenxiang Wang Environmental Science and Engineering College Dalian Maritime University Dalian Liaoning China Ocean and Civil Engineering Department Dalian Ocean University Dalian Liaoning China Key Laboratory for Micro/Nano Technology and System of Liaoning Province Dalian University of Technology Dalian Liaoning China

Because of the characteristics of stereo light microscope (SLM) micro stereovision system, noise is unavoidable in SLM microscopic images. It may have adverse effects on many techniques relative to images. The noise is analysed based on micro stereovision system and divided into random noise and fixed pattern noise, and then an image model is developed. The random noises in SLM microscopic images with various magnifications are quantified and the tiny increasing trend of random noise with the magnification becoming higher is found. Moreover, an extended vector median filter and an average calibration method are used to remove random noise and non-uniformity correction. The experiment results show that the random noise and fixed pattern non-uniformity can be removed efficiently with non-uniformity correction and vector median filtering.

关键词： Vectors microscopy Calibration Signal to noise ratio Filtering Optical filters

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Study on the 3D non-contact measurement method of hyaloid and closed container

Study on the 3D non-contact measurement method of hyaloid an...

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International Conference on systems and Informatics (ICSAI)

作者： Wei Pei Zheng Xu Yong Ying Zhu Chen Xiang Wang Environmental Science and Engineering College Dalian Maritime University Dalian Liaoning China Ocean and Civil Engineering Department Dalian Ocean University Dalian Liaoning China Key Laboratory for Micro/Nano Technology and System of Liaoning Province Dalian University of Technology Dalian Liaoning China

The research of microfluidic chip is a vital domain and the forefront of micro total analysis systems (μTAS). Compared with the development of microfluidic chip, the research of detecting systems for microfluidic chip is backward. The micro stereo vision system is a good solution for non-contact measurement of microfluidic chip. However, it often meets refraction of light and occlusion. In this paper, based on optical theory and digital image processing, the micro stereo imaging principle of stereo light microscope (SLM) is studied and the refraction correction and micro stereo occlusion correction algorithms are proposed to achieve microfluidic chip detection. These algorithms quantize the influence of cover plate and occlusion on the measurement accuracy, and realize nondestructive, non-contact and precise 3D measurement of a hyaloid and closed container.

关键词： Stereo vision microfluidics Semiconductor device measurement Sea measurements Adaptive optics Optical imaging Optical refraction

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A 6.2–9.5 GHz receiver for Wimedia MB-OFDM and China UWB standard

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science China(Information sciences) 2011年第2期54卷 407-418页

作者： GAO Ting1, ZHOU Feng1, LI Wei1, LAN Fei1, LI Ning1 & REN JunYan1,2 1State Key laboratory of ASIC & system, Fudan University, Shanghai 201203, China 2micro-/Nano-Electronics science and technology Innovation Platform, Shanghai 201203, China 1. State Key Laboratory of ASIC & System Fudan University Shanghai 201203 China2. Micro-/Nano-Electronics Science and Technology Innovation Platform Shanghai 201203 China

An integrated 6.2–9.5 GHz UWB receiver for both WiMedia MB-OFDM and China UWB standard is proposed. The receiver can cover Group#3, Group#4 for WiMedia and Group#2–5 for China UWB standard respectively. The fully differential receiver consists of a wideband LNA and a down conversion mixer with high gain and low gain mode. A low-pass filter with controllable gain and cut-o? frequency along with a programmable gain amplifier are also included. The chip was fabricated in TSMC 0.13-μm RF CMOS process. Measurement results show that the receiver achieves voltage gain from 21 to 69 dB with 2 dB/step and an NF of 3.2–4.6 dB over 6.2–9.5 GHz and 1-dB compression point of ?21 dBm. The intermediate frequency of the receiver can be switched between 264 and 132 MHz, which enables the receiver applicable for both WiMedia and China UWB standard. Power consumption is only 47 mA with 1.2–V supply voltage.

关键词： CMOS ultra-wideband (UWB) MB-OFDM China UWB standard radio frequency (RF) low noise amplifier (LNA) quadrature mixer low-pass filter (LPF) Gm-C noise figure

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A current-mode RF transmitter for 6–9 GHz MB-OFDM UWB application

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science China(Information sciences) 2011年第2期54卷 419-428页

作者： CHEN YunFeng1, FAN JinHan1, LI Wei1, LI Ning1 & REN JunYan1,2 1State Key laboratory of ASIC & system, Fudan University, Shanghai 201203, China 2micro-/Nano-Electronics science and technology Innovation Platform, Fudan University, Shanghai 201203, China 1. State Key Laboratory of ASIC & System Fudan University Shanghai 201203 China2. Micro-/Nano-Electronics Science and Technology Innovation Platform Fudan University Shanghai 201203 China

This paper presents a current-mode 6–9 GHz RF transmitter for MB-OFDM UWB systems. The proposed current-mode transmitter consists of current-mode IQ LPF, current mirror amplifier, IQ up-conversion mixer (up-mixer), differential power driver amplifier (PA) and high-speed divider with LO buffers for generating IQ LO signals. All circuits are designed to possess high linearity and wide bandwidth. The transmitter is fabricated in TSMC 0.13 μm 1P8M RF CMOS technology with a die area of 1.56 mm2. Measurement results show that a maximum output power of -0.7 dBm with an LO leakage/sideband rejection ratio (LOL/SB RR) around -33/ - 35 dBc is achieved, and that this transmitter excels the traditional voltage-mode counterpart in terms of high linearity (about +1 dBm output 1-dB compression point, +10 dBm output IP3 in average) with comparable power consumption (drawing 48 mA current from 1.2 V supply).

关键词： current-mode RF transmitter high linearity MB-OFDM UWB high speed divider CMOS

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Measurement and control of a micro heater used for qPCR chip

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Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of technology 2012年第SUPPL.2期44卷 294-297页

作者： Guo, Shi-Lei Tian, Hao Qin, Jian Liu, Ze-Wen Institute of Microelectronics Tsinghua University Beijing 100084 China Key Laboratory for Micro/Nano Technology and System of Liaoning Province Dalian University of Technology Dalian 116024 China School of Physics and Microelectronics Science Hunan University Changsha 410082 China

A micro heater using Pt as the material of thin film resistor and based on micro Electro Mechanical systems(MEMS) technology shows great applicability in the temperature control system of quantitative Polymerase Chain Reaction(qPCR) chip. The performance of micro heater and temperature sensor has been discussed after several experiments such as thermal uniformity experiment, heating and cooling speed experiment, temperature coefficient of resistance(TCR) calibration experiment. The experimental results have been compared with simulation results. The qPCR chip temperature control system based on experimental results is shown at the end of the article.

关键词： Polymerase chain reaction

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An On-line Multiparametric Water Quality Monitoring system Based on Visible Spectrophotometry

An On-line Multiparametric Water Quality Monitoring System B...

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2nd International Conference on Manufacturing science and Engineering

作者： Liao, Haiyang Tian, Peng Du, Yu Wen, Zhiyu National Key Laboratory of Fundamental Science of Micro/Nano-Device and System Technology China Microsystem Research Center Chongqing University Chong Qing 400044 China

ISBN: (纸本)9783037850312

Water quality monitoring plays an important role in contamination control and environment protection. This paper describes an on-line multiparametric water quality monitoring system based on visible spectrophotometry, which combines embedded technology with GPRS telecommunication technology. This system can realize online wireless monitoring to concentrations of chromium (Cr), plumbum (Pb), A surfactant (AS), chemical oxygen demand (COD), ammonia nitrogen (AN), total phosphorus (TP) and total phenol (TPh) in real time. The mechanical structure, hardware circuit and software design of the system are completed. The absorption spectrums of pure water and MB-SDS complex have been measured. Preliminary experiments using a model machine show that each mechanism of the system runs well. Moreover, the monitor possesses many advantages, such as high degree of automation, high reliability, high efficiency, compact structure, small size, and so on.

关键词： Water Quality Monitoring Visible Spectrophotometry Embedded technology GPRS

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Memory efficient LDPC decoder design

Memory efficient LDPC decoder design

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3rd IEEE Asia Pacific Conference on Postgraduate Research in microelectronics and Electronics, PrimeAsia 2011

作者： Yao, Yuan Liang, Wei Ye, Fan Ren, Junyan State Key Laboratory of ASIC and System Fudan University Shanghai China State Key Laboratory of ASIC and System Micro-/Nano-Electronics Science and Technology Innovation Platform Fudan University Shanghai China

ISBN: (纸本)9781457716096

Hardware complexity of LDPC decoders, which is caused by storage and processing of massive information, is the major reason that encumbers LDPC codes from widely application. Reducing the quantization word length of decoding information can effectively decrease the hardware complexity. But for the absolute value of information keeps increasing during decoding, short word length with finite quantization ranges will lead to serious saturation errors and damage decoding performance. Two quantization schemes is proposed in this paper to reduce the number of memory bits required by decoder design by using short word length while guarantee bit-error-rate (BER) performance. Results shows that these two quantization schemes can simplify the hardware complexity with very little loss of decoding performance. © 2011 IEEE.

关键词： Bit error rate

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A low power catalytic combustion gas sensor based on a suspended membrane microhotplate

A low power catalytic combustion gas sensor based on a suspe...

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6th IEEE International Conference on Nano/micro Engineered and Molecular systems, NEMS 2011

作者： Xu, Lei Li, Tie Gao, Xiuli Wang, Yuelin Zheng, Rui Xie, Lei Lee, Lichung State Key Laboratories of Transducer Technology Science and Technology on Micro-System Laboratory CAS Shanghai China RAE Lab. RAE Systems Shanghai China

ISBN: (纸本)9781612847757

A microhotplate based catalytic combustion gas sensor with low power consumption employing Pd-Pt/ γ-Al2O3 is presented in this paper. The microhotplate was fabricated on a silicon substrate by micromachining process. And the sensitive material Pd-Pt and compensation material γ-Al2O3 were prepared by sol-gel process. This sensor has been tested under constant working voltage to methane gas and achieved good performance. With the increasing of working voltage, both the output signal and power consumption of the sensor increased. The ratio of the sensitivity to power consumption was considered as an optimizing factor for selecting a rational working voltage. The sensor output signal showed a fairly linear relationship to the methane gas concentration. It achieved a sensitivity of 2mV/%CH4 to 50% LEL methane gas at a low power of 52mW. © 2011 IEEE.

关键词： Methane

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Fabrication multi-layer polymer microstructures by x-ray lithography with alignment

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作者： Li, Yigui Sugiyama, Susumu National Key Laboratory of Micro/Nano Fabrication Technology Research Institute of Micro/Nano Science and Technology Shanghai Jiao Tong University Shanghai 200240 China Department of Micro System Technology Rtsumeikan University 1-1-1 Noji-Higashi Kusatsu Shiga Japan

ISBN: (纸本)0878492119

Poly(methyl methacrylate)(PMMA) and Poly L-lactic acid (PLLA) are transparent and they are suitable for optical purposes. The multi-layer polymer microfabrication can be applied for a large displacement actuator and precision sensors. A new method is intruduced to generate the multi-layer polymers microstructures by X-ray lithography with alignment. The function of X-ray on polymer materials are breaking the polymer main chain and generating intermediates which can be degraded further and finally dissolved by the solvent interaction. The method for polymer micromachining by using X-ray lithography with alignment for fabrication multi-layer micro polymer structures is confirmed experimentatively. © (2011) Trans Tech Publications.

关键词： microfabrication

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A 14-bit 200-MS/s time-interleaved ADC with sample-time error detection and cancelation

A 14-bit 200-MS/s time-interleaved ADC with sample-time erro...

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7th IEEE Asian Solid-State Circuits Conference, A-SSCC 2011

作者： Yu, Bei Chen, Chixiao Zhu, Yu Zhang, Peng Zhang, Yiwen Zhu, Xiaoshi Ye, Fan Ren, Junyan State Key Laboratory of ASIC and System Fudan University Shanghai China Micro-/Nano-Electronics Science and Technology Innovation Platform Fudan University Shanghai China

ISBN: (纸本)9781467303989

A 14-bit 200-MS/s time-interleaved analog-to-digital converter (TI-ADC) is presented. An adaptively-controlled sampling switch is proposed to correct the sample-time error between two interleaved channels and an auto-correlation-based sample-time error detection algorithm is introduced to detect the sample-time error. A prototype ADC is fabricated in a 0.18-μm mixed-signal CMOS process with a power consumption of 460 mW from a 1.8-V supply. The ADC achieves an SNDR of 68.5 dB and an SFDR of 88.5 dB for a 15.33MHz input. © 2011 IEEE.

关键词： Error detection

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