集成磁场传感器的原理与应用

介绍了单片碰敏电阻式集成磁场传感器和霍尔元件式集成磁场传感器的原理,并详述其串口电路和温度补偿电路的设计以及抑制噪声的方法.     

磁敏传感器位移特性试验分析

利用本试验装置能方便地测出磁敏传感器的位移特性。当磁敏传感器结构，参数不同时，根据其测得的位移特性来评价和调度碳敏传感器，使其位移特性达到最佳值或要求的设计目的。     

非接触型双功能磁敏旋转传感器的研究

本文报道了一种非接触型双功能磁敏旋转传感器,能同时测量磁性旋转体的旋转速度和旋转方向。它由利用半导体平面工艺在ＩｎＳｂ单晶片上制成的桥式连结的ＩｎＳｂ电阻和永磁铁构成。分析了旋转传感器的核心敏感元件ＩｎＳｂ磁敏电阻及传感器的电路结构、工作原理。对传感器的特性进行了测量,实验结果符合理论设计。     

新型无触点开关传感器─—硅磁敏晶体管

新型无触点开关传感器─—硅磁敏晶体管湖南省建筑科学研究所周迪文目前，国内外对无触点开关、磁探场的需要，我国自制半导体３ＣＣＭ型磁敏晶体管，用作各种传感器（含遥讯遥测遥控），如工厂、矿山运送滚轮检测的传感器，汽轮机低速盘车系统的关键就是低速测量的传感器...     

基于磁敏Z元件触觉传感器的研制

介绍一种新型磁敏传感元件：Ｚ元件,对其伏安特性和磁特性进行研究,给出了实验结果。用该元件研制了阵列式触觉传感器,设计了由单片机控制的阵列扫描电路、数据采集电路以及接口电路,实现了触觉的测量。由于Ｚ元件的特殊特性,其应用电路极其简单。     

阵列式平面集成磁件的研究

本文从磁路和电路的结合出发，提出了在矩阵变压器上集成电感，通过电路的有效组合实现了解耦集成，形成了阵列式解耦集成磁件，然后，将其平面化，从而形成了阵列式平面集成磁件。阵列式平面集成磁件的平面化和阵列式结构使其达到了轻、小、薄的目的，并降低了损耗。仿真和实验表明本文提出的阵列式平面集成磁件具有良好的性能。     

基于Ansoft/Maxwell的VRM磁元件集成设计

本文对现有的两种磁元件集成方法(解耦型和耦合型)及各自特点做了简要介绍。针对以Buck+Half-Bridge两级电路为拓扑的VRM，鉴于其后级电路采取固定占空比的PWM控制，经分析得出解耦型磁元件集成方案比非解耦型磁元件集成方案更为适合。在确定方案之后，再结合VRM低压大电流输出的特点，提出一种适用的磁元件集成结构。借助Ansoft/Maxwell 2D对所设计的集成磁元件进行了损耗分析，并通过比较总结了该集成磁元件在损耗和体积两方面的良好表现。     

推导集成磁件变换器的新方法及磁件等效电路的通用模型

在磁集成技术应用中通常要面临的两个问题：①分立磁件变换器?集成磁件变换器的推导；②磁件等效电路的推导，文中提出比较简单、实用的集成磁件变换器推导方法，并建立磁件等效电路的通用模型，使磁集成技术研究中的部分工作得到简化。另外，文中还提出由磁集成变换器?分立磁件变换器的推导方法，为拓扑变换和电路综合分析提供了新的思路。     

非晶丝单磁芯双绕组闭环系统新型磁场传感器研究

本文研究了利用具有近零磁致伸缩系数钴基非晶态合金丝研制的新型磁场传感器,提出了采用单非晶丝磁芯双绕组结构的磁敏探头,改善了多谐振荡桥路的对称性,并通过引入负反馈形成的闭环测量系统,使非晶磁芯工作于零场附近的线性区域,从而使传感器的线性测量范围,线性度、温度稳定性及动态特性指标得以提高,对传感器的工作原理进行了分析,并设计了该传感器的信号处理电路,对研制中的关键技术作了介绍,给出了部分测试结果。     

可削减直流偏磁集成磁件在DC/DC变换器中的应用

在开关电源中存储和传递直流功率，会在磁件铁心中产生较大的直流偏磁，限制了磁件铁心利用率和电源性能的提高。该文依据削减和消除直流偏磁的思想，提出一种用于两通道交错并联型Buck变换器的可削减直流偏磁的集成磁件结构，建立了集成磁件的等效磁路和电路模型，分析了集成磁件的交、直流磁通分布及其对变换器动态响应速度、稳态电流纹波和输出电流波形的影响，给出了集成磁件的设计公式，完成了采用这种集成磁件的两通道交错并联型Buck变换器原理样机设计，通过理论分析和实验证明该文提出的可削减直流偏磁的集成磁件结构与现有结构相比具有诸多优点。     

SF_6气体密度在线监测装置

采用传感器技术和数字电路开发出数字式SF_6气体密度在线监测装置,并接入变电站综合自动化系统进行远方、在线监测,解决了机械式密度继电器无法适应无人值班变电站对设备运行状态进行实时监测的问题,有利于断路器状态检修的开展和电网的安全稳定运行。     

An Undergraduate Integrated Circuit Fabrication Laboratory

Over the last few years an integrated circuit fabrication laboratory intended primarily for use by undergraduates has been developed within the School of Electrical Engineering at Purdue University. Operating under the principle that integrated circuit design and laboratory practice are inseparable, the main objective was to allow the undergraduate student to acquire a working knowledge of how transistors, thin- and thick-film circuits, MOS field-effect transistors, and integrated circuits are fabricated. The emphasis is on how to fabricate the device in the laboratory and then to evaluate the device both electrically and metallurgically. This paper describes in detail how a device laboratory was organized for undergraduates with a minimal background in experimental technique.     

Sensitive DC Ground Fault Relays for Coal Mines

Recent US Bureau of Mines sponsored research aimed at virtually eliminating electrocutions on dc utilization circuits has resulted in an effective dc circuit protection device, called a sensitive ground fault relay (GFR). This relay can detect and act to interrupt small deadly ground currents that can trigger ventricular fibrillation in humans while ignoring spurious power system signals. Initially relay performance criteria were established to ensure reliability for mine duty as well as effectiveness for shock prevention. Mineworthy prototypes, consisting of a saturable-transformer current sensor and an electronic relay, were constructed. They complied with the performance standards in laboratory tests.     

一种热释电红外线传感器的应用

利用热释电红外线传感器,设计家用防盗报警系统的应用日益广泛。讨论了无线电感应、发射、接受、报警系统的构成,并结合应用电路分析了热释电红外线传感器工作性能,对利用热释电红外线传感器设计新型的家用防盗装置有一定的借鉴作用。     

Development of an electrothermal simulation tool for integrated circuits: Application to a two-transistor circuit

In this paper a methodology for performing electrothermal analyses on integrated circuits is introduced. Using the relaxation method, standard electrical and thermal simulators, which are often used in the design process, are coupled through an efficient interface program. The simulator is capable of performing steady-state and transient analysis at device and chip levels. A variable-time-step technique has been implemented to reduce the computational time for a given set of computational resources. The simulator has been validated on different structures such as the bipolar junction transistor to predict the temperature distribution and the device performance in an amplifier circuit and an integrated current-mirror circuit. The simulation results are compared to experimental results to verify the performance of the electrothermal simulator and the accuracy of the thermal model. Simulation results demonstrate that the approach is suitable to model the thermal effects of integrated circuits in a more time-efficient, accurate and user-friendly fashion.     

智能化断路器的开发

对智能化断路器的开发所涉及的关键技术进行分析和探讨。介绍一些基本的单元电路和相关技术,如单片机、专用集成电路、集成传感电源技术和系统集成化等,重点讨论了用于智能化断路器的智能化全功能低压脱扣器的开发,包括主要技术要求,总体结构和功能电路设计等。     

A simple all-optical light switch and its relations to opticalcomputing: a demonstration for teaching photonics

The authors discuss how a simple and inexpensive all-optical light switch can be built for teaching and demonstrating photonics in a classroom or for undergraduate lab experiments. The discussion of this readily understandable device will familiarize the student with the similarities and differences between photonics and electronics. As an example, the authors consider how this device relates to all-optical computing circuits, promoting a comparison between electronic and optical integrated circuits     

高性能晶闸管电力回收装置

本文介绍了一种高性能晶闸管电力回收装置，它以晶闸管两重桥逆变主电路将功率试验中的电能回馈电网，具有十分明显的能源回收利用效果，其控制单元全由集成电路组成，文中不但详细介绍了该电力回收装置各部分的工作原理，而且给出了其在２６０ｋＶＡ晶闸管二重桥电力回收系统中的实用效果。     

Surge protection for interface circuits of communication system

Microelectronic circuits are often damaged by surges. Surge protection for microelectronic circuits has some special requirements that are different than those for electrical equipment. The approach that the surge invades microelectronic circuits is studied in this paper. The surge withstand capability of some typical serial communication integrated chips, the behaviors of voltage-limiting components, and the influence of the connecting capacitance of a voltage-clamping device on digital signals are studied. Then, a design method of surge suppressor for communication systems is proposed.     

Systematic Characterization of Integrated Circuit Standard Components as Stimulated by Scanning Laser Beam

Laser stimulation (LS) has become a common technique of failure localization in integrated circuits (ICs). In optical-beam-induced resistivity change, thermally induced voltage alteration, Seebeck effect imaging, soft defect localization, etc., device modules with special passive and active device properties are the subject of stimulation effects. This paper investigates in detail the behavior and equivalent circuit models of most commonly used IC components, passives such as metal and polysilicon interconnect resistors and thermoelectric junctions, and actives like p-n diodes and field-effect transistors under illumination from both chip frontside and backside. The systematic characterization of the results improves the evaluation of LS analysis in failing circuits.