磁补偿式电压电流传感器及其应用

磁补偿式电压电流传感器主要用于电压、电流、功率、频率、阻抗或波形等电参数方面的测量。本文介绍了成都晶峰电子有限公司生产的磁补偿式电压、电流传感器的原理与用途,阐述了它们在电气参数测试系统中的应用。     

CS系列线性霍尔电流传感器及其应用

本介绍几种性线霍尔电流传感器的性能、封装尺寸及其应用方法。     

高电流／高温基于霍尔效应的线性电流传感器

该器件由一个低偏置的精密线性霍尔传感器电路组成,其铜制电流通路靠近晶片的表面。通过该铜制电流通路施加的电流能够生成可被集成霍尔IC感应并转化为成比例电压的磁场。精确的成比例电压由稳定斩波型低偏置BiCMOS霍尔IC提供,     

ZMC系列磁阻电流传感器及其应用

本文介绍美国ＺＥＴＥＸ公司生产的ＺＭＣ系列薄膜磁阻电波传感器的原理,结构,特点,技术参数和应用电路。     

IR2110功率驱动集成芯片应用

IR2110是IR公司的桥式驱动集成电路芯片,它采用高度集成的电平转换技术,大大简化了逻辑电路对功率器件的控制要求,同时提高了驱动电路的可靠性.对于典型的6管构成的三相桥式逆变器,采用3片IR2110驱动3个桥臂,仅需1路10 V～20 V电源.这样,在工程上大大减少了控制变压器体积和电源数目,降低了产品成本,提高了系统可靠性.文中介绍了该芯片的主要功能及技术参数,并就芯片典型应用电路进行了设计和分析.     

全光纤电流传感器在智能电网中的应用

本文主要就是对全光纤电流传感器在智能电网中的应用进行分析,首先对全光纤电流传感器的性能优点与基本原理进行了分析,并对光纤中线性双折射产生的原因以及其对测量结果产生的影响进行了分析,最后就解决和消除光纤中线性双折射的方法进行了探讨.     

一种电流检测传感器的原理与制作

该电流检测传感器专门用于检测电源和负载的交直流电流。它直接串联在电路和负载中,一旦负载接入或有微弱电流流过,该传感器就可以提供报警和控制输出,驱动继电器和其它控制电路。它的检测电路与控制输出端绝缘电阻高达109kΩ,隔离电压可以到3×103V以上,空载电流在50μA以下,使用起来非常方便可靠。电流检测传感器可以自动连动其它设备,起到自动检测开关的作用。经过继电器扩流后可以启动或关闭变压器、逆变器、电源等感性、容性及其它负载,其功能与普通负载传感器相似,但成本却很低。工作原理电路原理如图1所示。这里以220V交流供电为例…     

电压阀和电流阀非线性模型的提出及应用

目前的电路分析理论中由于没有非线性电路模型,故对于非线性电路的计算没有形成一个完整的体系。然而在现代的电路中,具有非线性特征的晶体管电路是一种主要的电路。为此,针对晶体管非线性电路,提出了两种能够表示此类非线性元件的电路模型：电压阀和电流阀。利用电压阀和电流阀模型,可对包含晶体管等非线性元件的电路进行电路模型描述,并在此电路模型描述的基础上,能够比较完善地解决晶体管非线性电路的静态、动态分析和计算问题。     

一种新型的宽线性范围差分电压输入电流传输器及其应用

设计了一种带有共模检测电路的宽线性范围差分电压输入电流传输器(DVCCⅡ).所提出的电路具有动态的长尾电流的差分对,可获得较大的动态线性输入范围.所提出的电路可以得到精确跟随特性和宽线性输入范围,且比较已有电路具有低电压低功耗等特点.采用SMIC 0.18μm工艺,用Spectre对电路进行仿真,电源电压是1.8 V,...     

Energy-efficient digital and wireless IC design for wireless smart sensing

Wireless smart sensing is now widely used in various applications such as health monitoring and structural monitoring. In conventional wireless sensor nodes, significant power is consumed in wirelessly transmitting the raw data. Smart sensing adds local intelligence to the sensor node and reduces the amount of wireless data transmission via on-node digital signal processing. While the total power consumption is reduced compared to conventional wireless sensing, the power consumption of the digital processing becomes as dominant as wireless data transmission. This paper reviews the state-of-the-art energy-efficient digital and wireless IC design techniques for reducing the power consumption of the wireless smart sensor node to prolong battery life and enable self-powered applications.     

一种分高低压供电的低压差线性稳压器的设计

针对传统低压供电的低压差线性稳压器线性响应比较慢的情况,提出了一种基于BICMOS 0.5μm工艺分高低压供电的低压差线性稳压器。经过Hspice仿真验证,该稳压器具有高增益、高PSRR（Power Supply Rejection Ratio,电源抑制比）、低功耗、响应速度快的特点,输入电压范围为0.5~28.0 V,输出电压为5 V。此稳定器低频时的开环增益达到86 dB,相位裕度为68o,低频时的电源电压抑制比为–91 dB,高频时也能达到–2 dB,静态电流只有13.5μA。     

逻辑加密IC卡芯片SLE4428及其应用

介绍了Siemens公司逻辑加密IC卡芯片SLE4428的基本组成、操作指令、时序以及与单片机的接口电路。该IC卡接口电路中加入了短路保护设计，可以防止插入非法卡而损坏其它元件。     

Pulsed voltage driven organic field-effect transistors for high stability transient current measurements

In this article, we propose the usage of gate voltage pulses of alternating polarity, to effectively suppress the hysteresis in organic field effect transistors (OFETs). The hysteretic behaviour of poly(3-hexylthiophene-2,5-diyl) (P3HT) based OFETs is systematically investigated by using continuous and pulsed sweep voltage mode. On the basis of the experimental results, both time settings and mode of gate bias voltage influence the carrier transport in the semiconductor channel. Hysteresis-free transfer characteristic curves are obtained by applying diametrically opposed gate pulses of a few milliseconds in duration. Stable on-current transient measurements are also achieved by implementing the pulse mode, thus allowing on-line gas sensing measurements to be successfully performed. Finally, the response of the sensor upon exposure to different concentrations of analyte vapours is found to be in good agreement with the Langmuir adsorption isotherm model.     

一种基于自举电路的可调恒压恒流源设计

介绍了一种基于自举电路的可调恒压恒流源的设计.解决了使用普通运算放大器调整较高输出电压的问题.在输出电压在较大范围变化时,通过自举的方法保证运算放大器的供电电压不变,并且能够对输出电压和电流进行有效地调整,实现了0~30V的电压输出和0~1A的电流输出.     

集成电路的电磁兼容测量标准及需求分析

探讨了集成电路电磁兼容测量标准研究的意义与需求分析,及其对产业发展的影响;介绍了集成电路电磁兼容测量的标准体系.以及标准的发展.     

利用激光互感器测量高压输电线的电流

随着输电电压的不断提高．输电线路上测量电压、电流的互感器的绝缘费用不断提高，采用激光互感器进行测量可大大节约该项费用。本文较系统地介绍了一种利用激光互感器测量高压线大电流的系统，分析了该系统的工作原理和设计方法，并分析了测量误差。     

Design and implementation of monostable multivibrators employing differential voltage current conveyors

In this paper, two novel application circuits utilizing the differential voltage current conveyor (DVCC) are introduced and implemented. To the best knowledge of authors, this is the first reported monostable multivibrators employing DVCC device. Each presented circuit is constructed by single DVCC as the basic active building block together with a few passive components. Both of them can be operated via a positive-edge triggering signal to generate a pulse waveform with an adjustable width. The first one is a general monostable circuit. The second design is an improved construction, which shortens the recovery time for applying the consecutive triggering signals. The circuit operations are first described and then the non-ideal issues and design considerations of the proposed circuits are discussed. To demonstrate their feasibility, the presented circuits are simulated using circuit simulation program Is-Spice. Available commercial ICs and discrete components are used to implement the prototype circuits. Simulation and experimental results agree well with the theoretical analysis.