共查询到18条相似文献,搜索用时 46 毫秒
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针对于目前CMOS电流控制电流传输器(CCCII)中普遍存在的温度依赖性问题,提出一个新的温度补偿技术。这种技术主要使用电流偏置电路和分流电路为CCCII产生偏置电流,其中偏置电路中的电流和μC′OX成正比。基于0.5μm CMOS工艺参数,运用HSPICE仿真软件,对提出的电路进行仿真,仿真结果验证了电路的正确性。 相似文献
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本文提出了一种基于MOCCII(多端输出的第二代电流传输器)的多输入多输出的电流模式滤波器。该电路仅由2个MOCCII及4个接地RC元件构成,能实现出单输出的低通、带通、高通、带阻、全通电流模式滤波器外,还能实现三种不同类型的具有同时多输出的电流模式滤波器.提出的电路不需要各输入电流之间的匹配和无源元件的匹配,具有很低的有源和无源灵敏度;同时应用基本电流镜技术实现了AB类的高精度CMOS MOCCII,并对MOCCII及提出的滤波器电路进行了PSPICE仿真。 相似文献
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一种适用于降压DC-DC的改进型电流检测电路 总被引:2,自引:0,他引:2
基于电流模式控制能够较好地改善DC-DC的性能,设计一种适用于降压DC-DC的改进型电流检测电路,所提出的电流检测电路提高了电流感应的速度和精度。通过对电路的理论分析与设计,采用SMIC 0.18μm CMOS工艺模型,利用Cadence工具对电路进行仿真验证,所提出的电流检测电路在负载电流为50 mA~500 mA时都能够达到96%的效率以及小于40 ns的建立时间。在开关频率为2 MHz时,输入电压范围为2.5 V~4.2 V,所需电感值为4.7μH,电容值为10μF,输出电压纹波小于18 mV。 相似文献
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基于MOCCⅡ的新型二阶电流模式滤波器 总被引:1,自引:0,他引:1
本文提出了一种基于MOCCⅡ(多端输出的第二代电流传输器)的多输入多输出的电流模式滤波器.该电路仅由2个MOCCⅡ及4个接地RC元件构成,能实现出单输出的低通、带通、高通、带阻、全通电流模式滤波器外,还能实现三种不同类型的具有同时多输出的电流模式滤波器.提出的电路不需要各输入电流之间的匹配和无源元件的匹配,具有很低的有源和无源灵敏度;同时应用基本电流镜技术实现了AB类的高精度CMOS MOCCⅡ,并对MOCCⅡ及提出的滤波器电路进行了PSPICE仿真. 相似文献
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Jien-Chung Lo 《Design & Test of Computers, IEEE》1998,15(4):49-56
Testing professionals must choose the online VLSI testing technique most suitable for mission goals with respect to design complexity, fault coverage, safety level, and product value. Online current testing techniques provide potential solutions to reliability problems in a wide spectrum of fault-tolerant applications 相似文献
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针对现有涡流传感器采用开环恒压驱动方式驱动,存在驱动电流受电路温漂和负载变化影响的问题,设计了一种应用线性控制理论的涡流传感器恒流驱动电路。详细介绍了该电路的各模块及多输入单输出反馈控制系统应用电路的设计。仿真和电路试验结果表明,相比于传统的涡流传感器开环恒压驱动电路,该电路不仅能提供恒定驱动电流,还具有较小的温漂及较强的负载变化能力。 相似文献
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采用电流传输器实现低通滤波器的精确补偿及仿真 总被引:1,自引:0,他引:1
以一个用第二代电流传输器(CCII) 实现三阶低通滤波器的例子来分析电路工作在非理想状态下的精确补偿方式,并进行计算机仿真,最后得出补偿后该电路具有有源低灵敏度的结论 相似文献
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研究了一种采用高边电流检测的滞环控制LED恒流驱动芯片。基于0.5um5V/18V/40VCDMOS.工艺,运用HSPICE工具对电路进行仿真,仿真结果显示:在4.5V~28V电源电压范围内,-40℃~+l25℃工作温度范围内,电路可为LED提供恒定的350mA驱动电流,LED驱动电流为滞环变化的三角波,最大误差为6.2%。通过调节外部信号DIM的占空比可以调节LED的亮度。 相似文献
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Schleker S Sun J Raghavan B Srnec M Müller N Koepfinger M Murthy L Zhao Z Klein-Seetharaman J 《Proteomics. Clinical applications》2012,6(1-2):117-133
Salmonella bacteria cause millions of infections and thousands of deaths every year. This pathogen has an unusually broad host range including humans, animals, and even plants. During infection, Salmonella expresses a variety of virulence factors and effectors that are delivered into the host cell triggering cellular responses through protein-protein interactions (PPI) with host cell proteins which make the pathogen's invasion and replication possible. To speed up proteomic efforts in elucidating Salmonella-host interactomes, we carried out a survey of the currently published Salmonella-host PPI. Such a list can serve as the gold standard for computational models aimed at predicting Salmonella-host interactomes through integration of large-scale biological data sources. Manual literature and database search of >2200 journal articles and >100 databases resulted in a gold standard list of currently 62 PPI, including primarily interactions of Salmonella proteins with human and mouse proteins. Only six of these interactions were directly retrievable from PPI databases and 16 were highlighted in databases featuring literature extracts. Thus, the literature survey resulted in the most complete interactome available to date for Salmonella. Pathway analysis using Ingenuity and Broad Gene Set Enrichment Analysis (GSEA) software revealed among general pathways such as MAPK signaling in particular those related to cell death as well as cell morphology, turnover, and interactions, in addition to response to not only Salmonella but also other pathogenic - viral and bacterial - infections. The list of interactions is available at http://www.shiprec.org/indicationslist.htm. 相似文献
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The use of multiphase drives has gained importance in recent times due to some advantages that they provide over conventional three-phase ones. High performance stator current control can be achieved by means of direct command of voltage source inverter. In this context finite-state model predictive control is a very flexible strategy that has been recently proposed and analyzed. Nevertheless, its implementation must solve the problem of estimating rotor quantities, being the conventional solution a simple backtracking procedure. In this respect, observers appear as an attractive alternative. However, while they have been used with FOC, sensorless drives and for fault detection, they have not been used yet for predictive control of drives as a way to provide rotor values estimates. In this paper the authors propose to incorporate a full-order rotor current observer in a finite-state model predictive controller of a five-phase induction machine. Pole placement design based on Butterworth filters is used. The new estimation scheme and the standard procedure are compared. By means of experimental tests, the differences between both approaches and the benefits of including a rotor observer are illustrated and verified. 相似文献