current adj. 1.通用的,流行的。 2.现在的,现时的,当时的。 3.流畅的;草写的。 the current price 市价。 current news 时事。 current expenditure 经常费。 current expenses 日常费用。 the current issue [number] (杂志的)本期。 the current week 本星期。 the current year 今年。 the 10th current [curt.] 本月十日。 current account 往来存款账;【法律】交互计算。 current English 现代通行英语,日常英语。 current handwriting 草书。 current money 通行货币。 current rate 现价,成交价。 current thoughts 现时代思潮。 pass [run, go]current 通用,流行。 n. 1.水流;气流;电流。 2.思潮,潮流;趋势,倾向。 3.进行,过程。 a cold current 寒流。 the Japan current 日本海流,黑潮。 the great current of events 天下大势。 a density 密着(海)流。 an alternating [a direct] current 【电学】交[直]流电。 current of air 气流。 current of time [the times] 时势,时代潮流 (go [swim] with [against] the current of the times 顺应[违反]时势)。
The spice simulation confirms the attractive properties of the proposed circuits . the simulative circuits of active network elements , analog signal operation and inductors based on current conveyors are systematically researched . a new active floating inductor is proposed 系统地研究了电流传送器在有源网络元件模拟、模拟信号运算和电感模拟电路中的应用,提出了一种基于电流传送器的新型模拟浮地电感。
Become a kind of new electronics circuit - current - mode circuit . it is replacing the traditional design method of the voltage - mode in the high frequency high - speed signal processing realm 。 this thesis mainly discussed the modified second - generation current conveyors based on the current - mode kinds of new cuicuit components , they are stronger modified standard current - mode parts in fuctions on this foundation . mainly including the modified differential difference current conveyor ( mddccii ) 、 the fully balanced second generation current conveyor ( fbccii ) 、 ( full balances ) four - terminal floating nullor ( fbftfn ) and the current differencing buffered amplifier ( cdba ) , they are all function very strong standard current - mode parts , they all can provide some circuit functions of better than general operation amplifier , because they have the voltage importation and the current importation , therefore use it since can carry out the voltage - mode signal processing circuit expediently , can also carry out the current - mode signal processing circuit expediently , and have to increase the benefit bandwidth to accumulate more widely than the voltage - mode , but have their advantages more according to the current - mode filter of the modified current conveyor , because it constitutes in brief , the filter wave function is stronger and they are better than in general use operation amplifier of many advantages , be easy to composing for example 、 high speed 、 frequency bandwidth 、 the power supply voltage requests low 、 consume small , the impedance is different from etc . advantages , otherwise they have biggish dynamic range , and flexible circuit synthesize , so they are the best active parts 从第二代电流传输器ccii入手,重点研究了以下几种改进型的第二代电流传输器:改进的差动差分电流传输器mddccii 、全平衡第二代电流传输器fbccii 、多输出四端浮地零器ftfn 、全平衡四端浮地零器fbftfn 、电流差分缓冲放大器cdba的电路结构及其模型。然后在此基础上系统地研究了基于这几种改进型的第二代电流传输器的滤波器的设计方法,主要方法和结果如下:利用mddccii设计了差分式连续时间电流模式低通、带通滤波器;电流模式跳耦结构考尔低通滤波器;利用fbccii设计了带通二阶节滤波器及电流模式双二阶通用滤波器;设计了基于多输出端ftfn的电流模式二阶通用滤波器电路;通过数字化开关选择的基于fbftfn的电流模式通用滤波器;设计了基于最少个数电流缓冲放大器(两个cdba )的多功能通用电流模式滤波器及其在非理想因素情况下分析。设计滤波器的主要方法是采用级联设计、运算模拟(信号流图法)和反馈设计(跳耦法) 。
This paper systematically presents the importance of the research of low - voltage and low - power analogue integrated circuit design , and it introduces the development of current - mode device - current conveyor ( cc ) and synthesizes its applications in the fields of active network and signal process 本文系统地阐述了低电压、低功耗模拟集成电路设计研究的必要性和重要性;介绍了电流模式器件? ?电流传送器的发展和当前在国内外的研究状况,综述了电流模式器件的优点和它在有源网络和信号处理方面的应用。
This thesis introduced the basic concept of the current - mode circuit and the basic theories of the filter first , then from the principle and the port characteristic of ( ccii ) the second generation current conveyor , analysis in recent years newly arisen of the current - mode filter the basic theories and domestic and international research circumstance carried on concretly , finally with the modified second generation current conveyors : the mddccii 、 fbccii 、 ftfn 、 fbftfnt and cdba etc . of the type with the 实验主要是利用pspice软件对所设计的滤波器进行仿真,设计过程中分析了各种滤波器的中心频率和品质因数,其中参数独立可调是这些滤波器的主要优点,另外对其灵敏度特性和部分器件的非理想特性也进行了分析,仿真结果都符合滤波器的设计要求。
Typical current - mode continuous - time filters include current - mode filter based on current conveyor , current - mode filter based on ota - c and current - mode filter based on current mirrors . they are rapidly developed in bandwidth , speed , precision , etc , and they bring the filter theories to noble times of fully integrated system development . there are many articles on continuous - time filter based on ota in nearly two years 在对版图设计的步骤、方法、所用软件以及cmos基础和工艺流程这些版图设计所需的基本理论研究的基础上,给出了本设计中用到的电容和nmos及pmos管版图结构,得到了具体ota - c滤波器版图,并对版图进行了几何设计规则检查和版图验证。