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Micromachined Infrared Thermopile Detector Based on a Suspended Film Structure

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Photonic Sensors 2023年第3期13卷 50-62页

作者： Cheng LEI Yihao GUAN Ting LIANG Xuezhan WU Yuehang BAI Mingfeng GONG Pingang JIA Jijun XIONG The State Key Laboratory of Dynamic Measurement Technology North University of ChinaTaiyuan 030051China Integrated Circuit Business Group China Resources Microelectronics LimitedWuxi 21400China

The micro-electromechanical system(MEMS)infrared thermopile is the core working device of modern information detection systems such as spectrometers,gas sensors,and remote temperature *** presented two different structures of MEMS infrared thermopiles based on suspended film *** both deposited silicon nitride over the entire surface as a passivated absorber layer in place of a separate absorber zone,and the thermocouple strip was oriented in the same direction as the temperature *** same MEMS preparation process was used and finally two different structures of the thermopile were characterized separately for testing to verify the impact of our design on the *** test results show that the circular and double-ended symmetrical thermopile detectors have responsivities of 27.932 V/W and 23.205 V/W,specific detectivities of 12.1×10^(7) cm·Hz^(1/2)·W^(-1) and 10.1×10^(7) cm·Hz^(1/2)·W^(-1),and response time of 26.2 ms and 27.06 ms,*** addition,rectangular double-ended symmetric thermopile has a larger field of view than a circular thermopile detector,but is not as mechanically stable as a circular thermopile.

关键词： Adiabatic groove circular arrangement double-ended symmetrical arrangement thermopile temperature gradient

Simplified Echo-State-Network Based Services Awareness for High-Speed Passive Optical Network

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china Communications 2017年第6期14卷 13-21页

作者： Huifeng Bai Dongshan Wang Yanbin Song Beijing SmartChip microelectronics Company limited Beijing 102200 China

With the challenge from services diversity grows greatly,the service-oriented supporting ability is required to current high-speed passive optical network(PON) .Aimed to enhance the quality of service(Qo S) brought by diversified-services,this paper proposes an Simplified Echo State Network(SESN) Based Services Awareness scheme in High-Speed PON(Passive Optical Network) .In this proposed scheme,the ring topology is adopted in the reservoir of SESN to reduce the complexity of original Echo State Network,and system dynamics equation is introduced to keep the accuracy of *** to the network architecture of 10G-EPON,a SESN Master is running in the OLT and a number of SESN Agents work in *** SESN Master plays the main function of service-awareness from the total view of various kinds services in 10G-EPON system,by fully SESN ***,the reservoir information of well-trained SESN in OLT will be broadcasted to all ONUs and those SESN Agents working in ONUs are allowed to conducts independent service-awareness ***,resources allocation and transport policy are both determined just only in *** results show that the proposed mechanism is able to better supporting ability for multiple services.

关键词： passive optical network servicesawareness simplified echo state network reservoir computation

Hierarchy echo state network based service-awareness in 10G-EPON

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The Journal of china Universities of Posts and Telecommunications 2016年第2期23卷 91-96页

作者： Bai Huifeng Wang Dongshan Wang Licheng Wang Xiang Beijing Smart Chip microelectronics Company limited Beijing 102200 China

Aimed to enhance the supporting ability for diversified services, this paper proposes a hierarchy echo state network（HESE） based service-awareness（SA）（HESN-SA） mechanism in 10 Gbit/s Ethernet passive optical network（10G-EPON）. In this HESN-SA, hierarchy architecture is adopted to realize echo state network（ESN） classification based SA. According to the network architecture of 10G-EPON, the parent-ESN（p-ESN） module works in the optical line terminal（OLT）, while the sub-ESN（s-ESN） module is embedded in optical network units（ONUs）. Thus, the p-ESN plays the main function of SA with a total view of this system, and s-ESN in each ONU conducts the SA function under the control of p-ESN. Thus, resources allocation and transport policy are both determined by the proposed mechanism through cooperation between OLT and ONUs. Simulation results show that the HESN-SA can improve the supporting ability for multiple services.

关键词： passive optical network service-awareness hierarchy echo state network echo state network

Naive Echo-State-Network Based Services Awareness Algorithm of Software Defined Optical Networks

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china Communications 2020年第4期17卷 11-18页

作者： Huifeng Bai Wenbin Chen Licheng Wang Chao Huo Beijing SmartChip microelectronics Technology Company limited Beijing 102200China

As internet services newly emerge with diversity and complexity, great challenges and demands are presented to the Open Flow controlled software defined optical networks(SDON) to achieve better match between services and SDON. With this aim, this paper proposes a naive Echo-State-Network(Naive-ESN) based services awareness algorithm of the software defined optical network, where the naive ESN model adopts the ring topology structure and generates the probability output result to determine the Qo S policy of SDON. Moreover, the Naive-ESN engine is also designed in controller node of SDON to perform services awareness by obtaining service traffic features from data plan, together with some necessary extension of the Open Flow protocol. Test results show that the proposed approach is able to improved services-oriented supporting ability of SDON.

关键词： software defined optical networks naive echo-state-network services awareness openflow protocol

A GaAs planar Schottky varactor diode for left-handed nonlinear transmission line applications

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Chinese Physics B 2012年第6期21卷 462-467页

作者：董军荣杨浩田超黄杰张海英 Institute of microelectronics Chinese Academy of Sciences Shenyang Zhongke microelectronics limited Company

The left-handed nonlinear transmission line （LH-NLTL） based on monolithic microwave integrated circuit （MMIC） technology possesses significant advantages such as wide frequency band, high operating frequency, high conversion efficiency, and applications in millimeter and submillimeter wave frequency multiplier. The planar Schottky varactor diode （PSVD） is a major limitation to the performance of the LH-NLTL frequency multiplier as a nonlinear component. The design and the fabrication of the diode for such an application are presented. An accurate large-signal model of the diode is proposed. A 16 GHz-39,6 GHz LH NLTL frequency doubler using our large-signal model is reported for the first time. The measured maximum output powers of the 2nd harmonic are up to 8 dBm at 26.4 GHz, and above 0 dBm from 16 GHz to 39.6 GHz when the input power is 20 dBm. The application of the LH-NLTL frequency doubler furthermore validates the accuracy of the large-signal model of the PSVD.

关键词： GaAs planar Schottky varactor diode left-handed nonlinear transmission lines fre-quency doubler

Effects of water level variations on the water quality of Huayang Lakes, china

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Journal of Geographical Sciences 2025年第1期35卷 173-188页

作者： AN Lesheng LIU Chun FAN Zhongya LIAO Kaihua WANG Wencai WANG Nan School of resources and Environment Anqing Normal University South china Institute of Environmental Sciences Ministry of Ecology and Environment The Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and LimnologyCAS

To explore water level variations and their dynamic influence on the water quality of Huayang Lakes, the water level from 1967 to 2023 and water quality from 2015 to 2023 were analyzed using the Mann–Kendall trend test, box plots, and violin plots. The results show a notable hydrological rhythm of water level alternation between dry and flood seasons in Huayang Lakes, with an average water level of 12.82 m and a monthly range of 11.21–17.24m. Since 2017, the water level of Huayang Rivers has shown a decreasing trend of –0.02 m/*** phosphorus(TP) has become the primary pollutant. The TP concentrations in Longgan Lake(the largest lake) during the dry, rising, flood, and retreating seasons from 2015 to 2023were 0.083, 0.061, 0.050, and 0.059 mg/L, respectively. The effect of water level on TP was mainly observed during the low-water period. When the water level in the dry season rose to 12.25 and 13.00 m, the percentage of TP exceeding 0.1 mg/L in Longgan Lake decreased to 55.8% and 33.3%, respectively. During the dry season, wind and wave disturbances caused the release of endogenous phosphorus in Huayang Lakes. This led to drastic fluctuations in TP concentration, reducing the correlation between water level and TP. When external control is limited, the water level during the dry season should be maintained between 12.25 and 13.0 m. Additionally, it is necessary to accelerate the restoration of submerged macrophyte species(such as Hydrilla verticillata and Vallisneria natans) in the Huayang Rivers.

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A 16-bit, ±10-V Input Range SAR ADC with a 5-V Supply Voltage and Mixed-Signal Nonlinearity Calibration

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Chinese Journal of Electronics 2022年第4期31卷 690-697页

作者： LUO Hongrui ZHAO Xianlong JIAO Zihao ZHANG Jie WANG Xiaofei ZHANG Ruizhi ZHANG Hong School of microelectronics Xi'an Jiaotong University Beijing Smartchip microelectronics Company limited

This paper presents a high-precision, successive approximation register(SAR) analog-to-digital converter(ADC) with resistive analog front-end for lowvoltage and wide input range applications. To suppress the serious nonlinearity brought by the voltage coefficients of analog front-end without deteriorating differential nonlinearity performance, a mixed-signal calibration scheme based on piecewise-linear method with calibration digital-to-analog converter is proposed. A compensation current is designed to sink or source from the reference to keep it independent of input signal, which greatly improves the linearity performance. Fabricated in a 0.5-μm CMOS process, the proposed ADC achieves 88-d B signalto-noise-and-distortion ratio and 103-d B spurious free dynamic range with 5-V supply voltage and 2.5-V reference voltage, and the total power consumption is 37.5 m W.

关键词： integrated circuit design analogue-digital conversion differential nonlinearity performance low-power electronics voltage coefficients spurious free dynamic range Semiconductor integrated circuit design, layout, modelling and testing signal-to-noise-and-distortion ratio resistive analog front-end CMOS digital integrated circuits reference voltage A/D and D/A convertors successive approximation register integrated circuit manufacture CMOS integrated circuits Electrical/electronic equipment (energy utilisation) calibration CMOS process analog-to-digital converter piecewise-linear method mixed analogue-digital integrated circuits digital-analogue conversion power consumption SAR ADC Mixed analogue-digital circuits calibration digital-to-analog converter mixed-signal nonlinearity calibration

A 0.19 ppm/°C bandgap reference circuit with high-PSRR

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Journal of Semiconductors 2018年第9期39卷 88-94页

作者： Jing Leng Yangyang Lu Yunwu Zhang Huan Xu Kongsheng Hu Zhicheng Yu Weifeng Sun Jing Zhu National ASIC System Engineering Research Center Southeast University Nanjing 210096 China china resources microelectronics limited Wuxi 214061 China

A high-order curvature-compensated CMOS bandgap reference（BGR） topology with a low temperature coefficient（TC） over a wide temperature range and a high power supply reject ratio（PSRR） is ***-order correction is realized by incorporating a nonlinear current INL, which is generated by ？V_（GS） across resistor into current generated by a conventional first-order current-mode BGR circuit. In order to achieve a high PSRR over a broad frequency range, a voltage pre-regulating technique is applied. The circuit was implemented in CSMC 0.5 μm 600 V BCD process. The experimental results indicate that the proposed topology achieves TC of0.19 ppm/°C over the temperature range of 165 °C（-40 to 125 °C）, PSRR of-123 d B @ DC and-56 d B @ 100 k Hz. In addition, it achieves a line regulation performance of 0.017%/V in the supply range of 2.8–20 V.

关键词： bandgap reference (BGR) temperature coefficient (TC) power supply rejection ratio (PSRR)

Research on the multicast mechanism based on physi- cal-layer-impairment awareness model for OpenFlow optical network

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Optoelectronics Letters 2016年第3期12卷 212-215页

作者：白晖峰周子冠宋彦斌 Beijing Smart Chip microelectronics Company limited Beijing 102200China

A physical-layer-impairment(PLI)-awareness based optical multicast mechanism is proposed for Open Flow controlled optical networks. This proposed approach takes the PLI models including linear and non-linear factors into optical multicast controlled by Open Flow protocol. Thus, the proposed scheme is able to cover nearly all PLI factors of each optical link and to conduct optical multicast with better communication quality. Simulation results show that the proposed scheme can obtain the better performance of Open Flow controlled optical multicast services.

关键词：损伤模型光网络物理层组播机制卡尔控制因素通信质量