Due to the effect of temperature variation on the carrier mobility, the threshold voltage and other parameters about process and device, the temperature stability of CMOS amplifiers is often relatively poor. In this article, a temperature compensation technique for CMOS amplifiers using constant-gm reference current biasing circuit is presented. The results of theoretical analysis and circuit simulation confirmed the effectiveness of this technique for short-channel MOSFET, in addition to long-channel devices.
This paper introduces how to reform the level control system with PLC,that supplies the ultra-pure water for our corporation,and describes the principle and manner of control,and so on.
The discrete cosine transform (DCT) has been widely used as the core of digital image and video signal compression. In this paper, we present a high throughput 2D DCT architecture, which is well suited for the application in real-time image or video system. The 2D DCT calculation is made using the 2D DCT reparability property, such that the whole architecture is divided into two ID DCT. These are described in this paper, with an FPGA implementation and the Verilog synthesis results as well.
A 4∶1 MUX IC for optical-fiber-transmission systems designed with 0 18μm CMOS technology is presented in this paper. It is implemented in tree-type architecture with source coupled FET logic (SCFL) circuits. The simulation of the MUX IC shows that it can work at 12 5Gb/s and its power consumption is less than 400mW with 1.8V power supply. The layout of the MUX IC has been designed with Cadence; its size is 2.4mm 2. It is now being fabricated in TSMC.
ASK module is integrated with MCU to finish detecting signal and outputting control. This functional module is put into detector and controller to building wireless communication network and being used in Intelligent Building's security system Collision question is considered and resolved. So this system can work steadily and meet the requirement of user.
本文较为详细地阐述了体硅CMOS结构中的闩锁效应,分析了CMOS结构中的闩锁效应的起因,提取了用于分析闩锁效应的集总组件模型,给出了产生闩锁效应的必要条件与闩锁的触发方式.通过分析表明,只要让CMOS电路工作在安全区,闩锁效应是可以避免的,这可以通过版图设计规则和工艺技术,或者两者相结合的各种措施来实现.本文最后给出了防止闩锁效应的关键设计技术.
传统的拣货方式由于速度慢、正确率低等原因已不能满足物流产业的飞速发展,本文提出一种用于辅助拣货的电子标签系统的设计方法,实现了计算机对整个拣货过程进行实时监控管理,提高了物流中心拣货的速度,且正确率可达99%以上.
M序列信号可以模拟白噪声,广泛应用于扩频通信、数字加密、数字系统测试等领域.如果能够将移位型计数器的全部状态加以利用,实现All States Sequence信号,则既可以实现同步计数,还可拓宽移位型计数器的应用领域.
A new current-mode multifunction filter with a single input and three outputs employing only three positive CCⅡs and five passive elements is presented in the paper. The circuit can be used to realize second low-pass, high-pass, band-pass, all-pass and notch current-mode filter functions, in addition, with low input impedance and high output impedance. No component matching is required and the sensitivities of all passive devices are low. The corresponding PSPICE simulation frequency responses of second-order filter are also given.
本文给出了一种LED数码管显示控制器的设计.该显示控制器具有三线串行接口、多种工作模式;可以最多控制8位7段LED数码管的显示或者64个单独的发光二极管;利用数控脉宽调制电路实现32级灰度控制.用VHDL描述了整个设计,并在Altera公司的EPF10K10LC84-3器件实现了该数码管显示控制器.
Two kinds of pre-distortion linearizing circuit are presented in this paper first,and then their operational principle and technical characteristics are analyzed.
In this paper, the advantages and disadvantages of the present CAI are analyzed, and a design scheme for Electronic Technology Multimedia CAI based on Author Ware is put forward. The system has the following six functions: Logging and Identification, Browse, Demo, Test, Experiment, Help. The whole system has the features: simple structure, powerful functions, easy operation, friendly interface and liable transplant.
本文介绍了基于直线电机、洛仑兹平面电机的0.1μm光刻机6坐标高速超精工件台的结构设计,其在300mm运动范围内,系统的定位精度和运动精度都达到纳米级,且具有优良的速度、加速度、变加速度等动态性能.
In the paper, the developing trend of microelectronics, and the microelectronics combined with micro-mechanics, as well as the future potential of system integration are described.
The application of real time operation system (RTOS) ‘DSP/BIOS’in the development and design of DSP is presented in the article. A fter general model of DSP is simply stated, the applications of RTOS in management of peripheral equipment, real time performance analysis and program flow control are discussed.
Since Korea set foot in semiconductor industry in the 1970's, its semiconductor industry has been promoted by a series of production-teaching-research politics, and it has been the third powerful nation in semiconductor industry after America and Japan. In this paper, its course of development is summed up briefly, and several factors of success are analyzed through the growing process of the famous semiconductor manufactories, as well as linking the investing trend in semiconductor industry and the recent developing trend of two greatest firms in Korea, the developing directions of semiconductor industry in Korea in coming years are analyzed too.
The fabrication of silicon tip and its application in different fields are introduced in the article. The method to fabricate silicon tip is compatible with modern IC technology; in addition, the silicon tip may be easy to sharp, so that it is more practical than other materials. It is believed that the application of silicon tip will be newly developed with the improvement of fabrication technology and other correlative technologies.
The CS5513 made by CRYSTAL Corporation are △-∑ analog-to-digital converters at low cost and easy to use, which use the charge balance techniques to achieve the performance of 20 bit data. In this paper the performance and work principle of CS5513, including their typical hardware circuit interface and software programming method are introduced. At last, the application about A/D conversion techniques to high precision data gathering is simply expounded.
The programmable logic devices are playing an important role in the development of integrated circuits. Along with the development of DSM technology and VDSM technology, PLD is moving toward SOPC. This paper expatiates on the design strategy of SOPC based on IP in detail.
EP7312 is a product based on ARM720T core that designed by Cirrus Logic Corp. The orientation of the main purpose of EP7312 is for the calculator and digital audio set. This article gives the structure,function,and the characteristic of interface of EP7312,as well as the application in the embedded system.
