用信流图法设计n阶CCⅡ电流模式滤波器

提出了用信流图设计ｎ阶ＣＣⅡ（第二代电流传输器）电流模式低通滤波器的方法。该滤波器由具有双输出端的第二代电流传输器（ＣＣⅡ±）和同相第二代电流传输器（ＣＣⅡ＋）及接地ＲＣ元件构成。与同类电路［４］比较,设计更简便,结构更简单。ＲＣ元件全部接地,便于集成。     

基于MOCCCⅡ-C的二阶多功能电流模式滤波器

提出了一种基于第二代电流控制传输器(CCCⅡ)的电流模式滤波器。电路由2个第二代多输出电流控制传输器(MOCCCⅡs)和2个接地电容构成,通过选择不同的输出端口可以实现高通、带通、低通、带阻、全通的功能。调整MOC-CCⅡs的偏置电流和电容值可以改变特征参数,产生的电路具有很低的灵敏度。最后对引入的MOCCCⅡ及提出的电路进行PSpice仿真。     

用信流图实现n阶CCⅡ电压模式滤波器

用信流图对电压传递函数进行模拟,再由基于双输出端电流传输器（ＣＣⅡ±）的积分器、基于反相第二代电流传输器（ＣＣⅡ－）的电压加法器和基于同相第二代电流传输器（ＣＣⅡ＋）的电压放大器综合出ｎ阶电压模式ＣＣⅡ滤波器。使用该方法,可实现任意阶低通、高通、带通等类型的ＣＣⅡ滤波器。     

一种基于OTA和CCII实现的n阶低通滤波器

提出了用信号流图法设计n阶基于OTA（跨导运算放大器）和CCII（第二代电流传输器）电流模式低通滤波器的方法。该滤波器由具有双输出端的平衡滤波器和第二代电流传输器及接地电容构成。与同类电路比较,设计更简便,结构更简单,无源元件全部接地,易于集成。     

一种新型CMOS电调谐第二代电流传输器(ECCⅡ)

提出了一种新型高线性宽调谐范围的CMOS电调谐第二代电流传输器(ECCⅡ),通过引入两个电流平方电路,使其电流增益能够通过直流偏置连续可调,0＜k≤2.并采用TSMC0.35 μm CMOS工艺参数,±1.5 V供电电源条件下对ECCⅡ进行了HSPICE模拟,结果表明,vX/vY和iZ/iX的-3 dB带宽分别为85 MHz和61 MHz,功耗为5.1 mW.该电路在可调谐连续时间电流模式滤波器设计中有广泛的应用前景.     

基于CCⅡ多输入单输出电流模式滤波器

为了实现结构简单、便于集成的三输入单输出电流模式滤波器,提出了三输入单输出电流模式滤波器的信号流图。用CCⅡ（第二代电流传输器）及多端输出的电流镜实现了该信号流图,得到一个由CCⅡ及电流镜共同构成的电流模式滤波器。该滤波器由2个CCⅡ、1个三端输出的电流镜及4个RC元件构成,能方便地实现5种滤波器输出。该滤波器可用于通信、电子测量与仪器仪表中的信号处理。硬件实验结果表明提出的电路是正确的。     

基于MOCCⅡ的多环反馈电流模式滤波器的系统设计

本文提出一种n阶多环反馈（multiple-loop feedback )MOCCⅡ（多端输出第二代电流传输器）电流模式滤波器的系统设计方法。用该方法可产生出多种不同结构的n阶多环反馈滤波器，所有n阶滤波器均由n个MOCCⅡ及2n个RC无源元件组成。所产生滤波器的所有RC元件均接地，便于集成。文中还给出了四阶巴特沃滤波器的设计举例及PSPICE计算机模拟结果。     

一种基于CMOS CCDVCC Ⅱ的可编程多功能滤波器及可编程测量放大器

介绍了一种新型的电调谐差分电压输入第二代电流传输器.并且用其构成一种电压模式多功能滤波器,可以获得:低通、高通、带通、带阻、全通传输函数.且这种滤波器可以通过调节电流传输器偏置电流独立改变传输函数的品质因素和固有频率.这种多功能滤波器仅仅使用两个CCDVCCⅡ、一个电阻和两个电容构成,且不需要任何元件匹配.而且,可以利...     

用CCII回转器设计梯形结构电流模式滤波器

该文提出一种设计高阶CCⅡ(第二代电流传输器)电流模式滤波器的新方法,即用CCⅡ回转器综合电流模式无源梯形网络的输入导纳,从而设计出高阶电流模式CCⅡ滤波器。用该方法设计出的电路与其它同类电路比较,电路结构简单、所使用的CCⅡ数目少。文中对CCⅡ的非理想特性进行了分析,提出了对CCⅡ的非理想特性进行补偿的方案。文中给出了六阶巴特沃斯滤波器的设计举例及补偿前和补偿后的计算机PSPICE仿真结果。     

电流模式带通滤波器设计

随着电子技术的发展,电流模式电路也越来越受到人们的关注,尤其是CCII(第二代电流传输器),本文针对以往电路过于复杂的特点,利用CCII(第二代电流传输器)设计基于单个CCII的带通滤波器电路,该电路仅使用一个CCII和几个R,C元件,与同类电路相比,该电路结构简单,且具有更低的无源灵敏度。     

基于MOCCⅡ和CCCⅡ的三输入单输出滤波器的设计

设计一种基于多输出电流传送器（MOCCⅡ）和电流控制传送器（CCCⅡ）的二阶电流模式多功能滤波器,其电路结构简单,通过选择不同的输入端口,可以实现低通、带通、高通的功能,无源元件全部接地,便于集成且与VLSI工艺兼容。所设计的电路具有很低的灵敏度,最后对该电路进行PSpice仿真分析,理论分析和计算机仿真结果相符,表明电路方案正确可行。     

一种新颖的电压模式通用二阶CCII滤波器设计

提出了一种基于电流传送器的电压模式通用二阶滤波器电路。该电路由三个电流传送器（CCII＋／-）、两个电容、三个电阻构成，它能实现二阶低通、带通、高通、陷波、全通滤波函数。分析了该电路的电压传输函数及电路参数，并用PSPICE对该电路进行了仿真，仿真结果表明，该电路设计正确，电路结构简单，所用元器件少。     

基于CCCⅡ的多功能滤波器及其仿真研究

提出了由电流控制传输器 (CCC )实现的新型电流模式和电压模式多功能滤波器电路 ,该滤波器由CCC 和两个接地电容构成。电路具有以下特点 :可实现多种滤波功能 ;易于集成 ;能独立调节中心频率 ω0 和品质因数 Q;灵敏度较低     

电流传输器模拟电感的设计及其在振动控制中的应用

通过电流型运算放大器组成第二代电流传输器与RC元件实现模拟电路的设计,由此搭建压电分流阻尼系统控制机械结构振动.通过软件仿真测试模拟电感电路设计的正确性,并以根部粘贴压电陶瓷片的固支梁结构为例,对该结构的第三阶模态振动控制进行了实验研究和分析,结果表明:所设计的新型压电分流电路具有良好的减振效果.     

Universal active current filters using single second-generation current conveyor

Two novel universal active current filters, one of which has multiple outputs and the other of which has a single output and high output impedance, employing a single negative second-generation current conveyor, three position-fixed capacitors and four/five position-fixed resistors are proposed. The proposed networks with the advantages of low passive sensitivities can obtain second-order lowpass, bandpass, highpass, notch and allpass current signals by adjusting the magnitudes of a grounded resistor and a grounded capacitor provided that another resistor is separable. The resonance angular frequency and quality factor are insensitive to the current tracking error of the nonideal CCII.<>     

Comment on "Electronically tunable current-mode second-order universal filter using minimum elements"

This comment, relates to a recently published paper by M. Sagbas and K. Fidanboylu (see ibid., vol.40, p.2-4, 2004) which presents a current-mode second-order universal filter for realising lowpass, bandpass and highpass responses. This filter employs two second-generation current controlled conveyors (CCCIIs) and two capacitors. It is shown here that this circuit is not new, simply derived from another filter proposed by S. Ozoguz and C. Acar (see ibid., vol.33, p.948-9, 1997), employing CCCIIs instead of second-generation current conveyors (CCIIs).     

Parasitic compensation in CCI-based circuits for reduced power consumption

In this paper, the compensation advantage of the first-generation current conveyor (CCI) over the second-generation current conveyor (CCII) in tunable circuits is shown. For this purpose, a new floating frequency dependent negative resistor (FDNR) simulator using three CCIs is presented and employed in a third-order high-pass filter. The compensation feature of the CCI is shown for the proposed high-pass filter. As a second example, the presented compensation method is tested in a second-order band-pass filter constructed with two CCIs. Applying the proposed compensation technique, the CCI-based circuits can operate in lower biasing currents, which result in lower power consumption.     

Canonical inductor simulators with grounded capacitors using DCCII

Differential current conveyor (DCCII) can be defined as a second-generation current conveyor with current differencing capability. In this article, a BJT implementation of the DCCII is introduced. Also, to emphasise the advantage of this active element, two new inductance simulator circuits are proposed as application examples. Furthermore, the presented inductor simulator circuits employ a minimum number of elements and they enjoy having grounded capacitors. Experimental and simulation results are given to verify theoretical analyses.     

High input impedance voltage-mode universal biquadratic filter using two OTAs and one CCII

A three-input and single-output voltage-mode universal biquadratic filter with high input impedance, using only two operational transconductance amplifiers (OTAs), one plus-type second-generation current conveyor (CCII) and two capacitors, is presented. The proposed circuit can realize all the standard filter responses, that is, highpass, bandpass, lowpass, notch and allpass filters, from the same configuration. The proposed circuit has no requirements for component matching conditions.     

A Low-Power Programmable Bandpass Filter Section for Higher Order Filter Applications

We present a programmable, continuous-time bandpass filter that is extremely compact, power efficient, and can cover a wide range of frequencies (10 Hz-10 MHz). This capacitively coupled current conveyor (C ⁴) has a second-order bandpass transfer function and is capable of being used as a basic bandpass-filter element to create high-order filters. The use of floating-gate transistors helps to ease the difficulties of effectively utilizing G _m-C filters by providing precise, programmable current sources that set the filter's time constants. Additionally, we provide an algorithmic design approach for constructing these bandpass filters to meet any given specifications. This bandpass filter is ideally suited to large filter-bank applications because of its small size and low-power demands.