1 . a small and cheap 8 - bit microcontroller is used as control core . all components of the sensor , some of which are necessary for the multiple and intelligent functions , are selected ones with low cost and small package . by designing all auxiliary logic circuits in a complex programmable logic device ( cpld ) , and integrating all analog circuits in an application specific ic ( asic ) , the size of pcb board is greatly reduced , which make it possible that the pcb can be installed with the displacement detector together 系统采用小型廉价8位微控制器控制，电路内配置了为实现多功能智能化所必需的硬件，并全部采用低价格、小体积器件，还将所有辅助逻辑电路设计在一片复杂可编程逻辑器件cpld内，所有模拟电路集成于一片专用集成电路asic内，大大缩小了电路板尺寸，再与传感元件组装在一起，从而使整个系统在保证智能化功能的前提下，具有体积小、成本低、一体化和抗干扰能力强的特点。
For the high - speed digital signal processing , the structure of fpga and dsp is widespreadly adopted . dsp is more featured in the implementation of complicated algorithm , while field programming gate array ( fpga ) shows more advantage in its flexibility of design , simplicity of system configuration , modification and maintenance . in the paper , the hardware system of the spaceborne radar is based on the structure of fpga and dsp , of which the signal processing part is accomplished with one fpga chip and multi dsps Dsp适合完成结构复杂的算法;现场可编程逻辑阵列( fpga )适合完成高效、算法固定的任务;与专用集成电路( asic )相比, fpga优点主要在于其很强的灵活性、可在线配置、修改和维护方便等优点。本文工程中的星载雷达信号处理和控制系统就是采用dsp + fpga的方式。其中信号处理采用的是xilinx公司的virtex -和virtex系列fpga和多片analogdevices公司的tigersharcts101的硬件电路结构。
A infrared system with which can detecte the pulse of human . because human body are semitransparent , and the transparence of it change along with the heart beat . the infrared sensor can detecte the change , we may tanslate the signal from sensor into a digital form by a cmos ic . when the signal change into a digital form , another ic can get the rhythm of the heart from the analog ic . this article designed the anologe ic which got the sensor signal into digital form 本论文完成了一个基于反射型红外线传感器的cmos模拟专用集成电路的设计,它构成的红外系统具有探测心跳频率的功能。设计根据人体组织的半透明度会随心脏跳动而变化的特点,由传感器探测到这一变化,通过专用集成电路将信号放大并利用,获得心跳频率。本模拟芯片结合数字电路可计算即时心率或统计心跳总数。
The results of the experiment indicated that , on the one hand , this system is superior to old nc system in size , power waste , precision , reliability and the capability of anti - jamming ; on the other hand , it is better then the software interpolation in speed and real - time working . moreover , this system has also been modified as software , although it is hardware in nature , which makes maintenance and upgrade easier 此外，由于可编程专用集成电路具有可反复编程的特性，使得该硬件电路也能够象软件那样方便灵活、易于修改，可随时通过改变器件的编程来实现系统重构，或根据需要进一步完善、修改其插补功能，从而极大地方便了系统的维护和升级。
This paper is about algorithms of carrier recovery used in dvb - c channel receiver system and its implementation in asic ( application specific integrated circuit ) . the first chapter gives an overview of digital hdtv and its development , then focus on the dvb - c system , finally talks about the technology involved in asic 第一章首先概述了数字电视及其发展，接着重点介绍了dvb - c有线电视传输系统，并对专用集成电路( asic )设计的发展、流程及将来的趋势? ? soc的设计技术作了概述。
In the electronic industry today , the combination of increasing complexity of todays asic and systems designs and relentless time - to - market ( ttm ) pressures has resulted in verification , especially functional verification , jumping to the top of the list of bottlenecks in the design and development of electronic products utilizing soc 近几年来随着专用集成电路( asic )和系统芯片( soc )的复杂度的不断提高，以及来自面市时间的巨大压力，芯片验证，尤其是功能验证正日益成为电子产品开发和设计的“瓶颈” 。
Dds951 series electronic single - phase electric meter is the most advanced static electronic meter in china . the meter designs use large - scale intergated circuit . high reliability step motor , it can the ac single - phase active energv voltage rating : 220v : frequency 50hz , positive and negative two directions and accumulates in one direction . the test singnal is isolated by phototransistor : it also has the function of anti - fraud , and indicates it s operation situation on flash light , so it could be managed very easy Dds951单相电子电能表，是金雀仪表公司开发的新型电度表。该产品是采用规模专用集成电路，高可靠性步进电机等先进技术制造的国内最新电能试题新产品，用来计量额定电压为220v ，频率为50hz的交流单相有功电能，该产品能够精确计量正负两方向的有功电能，且以同一个方向累计。
Data - collecting device is one of the most important parts of this system . in this thesis , we advance a new method based on the asic technology to realize the main function of the data - collecting device in the market now . at first , we introduce the advantage of designing the device through asic technology 文章介绍了用专用集成电路方法设计抄表器电路的优点，并对专用集成电路的各种设计方法作了比较，结合本课题的时间紧、费用低、需要取得阶段性成果的特点，提出了用fpga方式来实现抄表器的asic设计。
