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腔内倍频锁模的Nd:LuVO4绿光激光器
腔内倍频 Nd:LuVO4 锁模绿光激光器
2019/4/18
介绍腔内倍频锁模的Nd：LuVO4-LBO绿光激光器，用SESAM作为可饱和吸收体，获得76 MHz、17.6 ps、385 mW的绿光输出，从泵浦光到绿光的光光转化效率为4.1%。实验中观察到绿光对SESAM锁模扰动的现象，分析其原因并成功地解决了该问题。
基于粒子群算法优化最小二乘支持向量机的电路故障诊断方法
故障诊断 粒子群算法 最小二乘支持向量机
2016/7/25
针对数/模混合电路故障的特点，采用将粒子群算法与最小二乘支持向量机相结合的故障诊断方法，在保证诊断过程准确率的基础上，实现多类故障的快速诊断。在诊断过程中，支持向量机的参数寻优过程存在随意性、盲目性和效率低等问题，采用改进的粒子群算法优化支持向量机的参数，建立基于支持向量机的故障分类模型。实验结果表明，与其他方法相比，该方法提高了故障诊断的精度，具有明显的实用价值。
Modeling and simulation of luminescence detection platforms
Luminescence probes Modeling CMOS sensor Post-processing
2015/8/12
Motivated by the design of an integrated CMOS-based detection platform, a simulation model for CCD and CMOS imager-based luminescence detection systems is developed. The model comprises four parts. Th...
Analysis of Active Pixel Sensor Readout Circuit
Active pixel sensor (APS) CMOS image sensor high-speed imaging readout electronics
2015/8/12
This brief provides a detailed analysis of active pixel sensor, pixel and column circuit. Surprisingly, we find that shorter readout times can be achieved by reducing the bias current and hence reduci...
Analysis of 1=f Noise in Switched MOSFET Circuits
1 noise CMOS image sensor nonstationary noise model periodically switched circuits phase noise ring oscillator time-domain noise analysis
2015/8/12
Analysis of 1 noise in MOSFET circuits is typically performed in the frequency domain using the standard stationary 1 noise model. Recent experimental results, however, have shown that the estimates u...
A 640 512 CMOS Image Sensor with Ultrawide Dynamic Range Floating-Point Pixel-Level ADC
Analog-to-digital conversion (ADC) CMOS image sensors digital cameras dynamic range image sensors mixed analog–digital integrated circuits pixel-level ADC video cameras
2015/8/12
Analysis results demonstrate that multiple sampling can achieve consistently higher signal-to-noise ratio at equal or higher dynamic range than using other image sensor dynamic range enhancement schem...
A Nyquist-Rate Pixel-Level ADC for CMOS Image Sensors
Analog-to-digital conversion cameras CMOS image sensors image sensors mixed analog–digital integrated circuits pixel-level analog-to-digital converter (ADC) video cameras
2015/8/12
A multichannel bit-serial (MCBS) analog-to-digital converter (ADC) is presented. The ADC is ideally suited to pixel-level implementation in a CMOS image sensor. The ADC uses successive comparisons to ...
Optimizing Dominant Time Constant in RC Circuits
Circuit optimization circuit topology clocks crosstalk delay effects dominant time constant integrated circuit interconnections nonlinear programming RC circuits semidefinite programming
2015/8/12
Conventional methods for optimal sizing of wires and transistors use linear resistor-capacitor (RC) circuit models and the Elmore delay as a measure of signal delay. If the RC circuit has a tree topol...
Analog neuron circuits based on both frequency modulation and pulse modulation are investigated. The circuits are compared in terms of size, power, performance, and reliability; frequency modulation s...
Configuration of VLSI Arrays in the Presence of Defects
Circuit area fault tolerance percolation theory probabilistic analysis queuing processes systolic arrays wafer-scale integration wire length
2015/8/12
The penalties for configuring VLSI arrays for yield enhancement are assessed. Each dement of the fabricated array is assumed to be defective with independent probability p. A fixed fractmn R of the el...
Two-Dimensional Stochastic Model for Intercoxinections in Master Slice Integrated Circuits
Two-Dimensional Stochastic Model Interconnections Master Slice Integrated Circuits
2015/8/12
Two-Dimensional Stochastic Model for Intercoxinections in Master Slice Integrated Circuits.
A Stochastic Model for Interconnections in Custom Integrated Circuits
Stochastic Model Interconnections Custom Integrated Circuits
2015/8/12
A stochastic model for interconnections in integrated circuits composed of unequal size logic blocks separated by routing channels is described. An algorithm, based on the model, is given for estimati...
Applications of semidefinite programming
Nonlinear convex programming linear matrix inequality the semidefinite programming linear function linear matrix inequality the control theory integrated circuit design
2015/8/11
A wide variety of nonlinear convex optimization problems can be cast as problems involving linear matrix inequalities (LMIs), and hence efficiently solved using recently developed interior-point metho...
Self-tuning for maximized lifetime energy-efficiency in the presence of circuit aging
Integration framework optimizing control strategy of dynamic control self-tuning parameters circuit aging supply voltage
2015/8/7
This paper presents an integrated framework, together with control policies, for optimizing dynamic control of self-tuning parameters of a digital system over its lifetime in the presence of circuit a...