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提出了采用电流传输器作有源器件实现RC滤波器,其电路结构简单,使用元件数目少,输入阻抗高,电路级联无需阻抗匹配。 相似文献
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提出了一种采用有源RC滤波器实现复数滤波器时可快速确定无源器件参数值的设计方法.设计了一款中心频率为2MHz,带宽为2.4MHz的有源RC复数滤波器,并对自动频率调谐系统进行了分析. 相似文献
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提出了采用电流传输器作有源器件实现RC滤波器,其电路结构简单,使用元件数目少,输入阻抗高,电路级联无需阻抗匹配。 相似文献
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N阶有源滤波器的散射参数综合法 总被引:1,自引:0,他引:1
讨论了用散射参数设计滤波器的优点,根据用散射参数表达的串联阻抗Z和并联导纳Y的二端口特性,给出了它们的有源RC电路模型,设计了一个用OPA和RC元件组成的N阶滤波器电路,不必改变电路参数,能同时实现高通和和低通滤波功能,本设计方法具有一定的理论和实践意义。 相似文献
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基于第三代电流传输器的电流模式有源滤波器 总被引:1,自引:0,他引:1
提出了由电压模式有源RC滤波器导出基于第三代电流传输器的电流模式滤波器的方法.所得的电流模式二阶滤波器结构简单,能实现二阶低通,高通,带通滤波,不仅所有无源和有源灵敏度都很低,而且当无源参数确定后,有源参数对极点频率不产生影响,保持恒定.HSPICE仿真表明,所提出的电路是可行的. 相似文献
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以RC有源滤波器电路为例,利用示波器来讨论表征电路频率响应特性的波特图的作图方法,研究简明,直观的图形法来阐述RC有泺滤波器的电路特性以及电路的优化设计方法。 相似文献
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A design of current-mode continuous-time filters for low voltage and high frequency applications using complementary bipolar current mirror pairs is presented. The proposed current-mode filters consist of simple bipolar current mirrors and capacitors and are quite suitable for monolithic integration. Since the filters are based on the integrator type of realization, the proposed method can be used for a wide range of applications. The frequency of the filters can easily be changed by the DC controlling current. A fifth-order Butterworth and a third-order leapfrog filter with tunable cutoff frequencies from 20 MHz to 100 MHz are designed as examples and simulated by SPICE using standard bipolar parameters. 相似文献
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Design techniques for a new class of integrated monolithic high-permittivity ceramic waveguide filters are presented. These filters enable a size reduction of 50% compared to air-filled transverse electromagnetic filters with the same unloaded Q-factor. Designs for Chebyshev and asymmetric generalised Chebyshev filter and a diplexer are presented with experimental results for an 1800 MHz Chebyshev filter and a 1700 MHz generalised Chebyshev filter showing excellent agreement with theory. 相似文献
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介绍了采用三维微波电磁场仿真软件快速提取直接耦合波导带通滤波器耦合窗口参数的方法,并提出了优化最终模型的快速扫描技术.全波仿真及实验结果表明,该方法能满足波导带通滤波器快速精确设计的要求. 相似文献
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Celestino A. Corral 《Analog Integrated Circuits and Signal Processing》2005,42(2):147-159
The inverse ultraspherical filter is derived and its properties analyzed. It is shown that the inverse ultraspherical filter has smaller transition band than the inverse Chebyshev filter under certain circumstances while still maintaining the maximally flat passband characteristic. Filter pole and zero calculations are described and typical magnitude and delay responses generated. Nomographs of inverse ultraspherical filters are also provided for determining filter order and for possible magnitude response optimization.Celestino A. Corral was born in Havana, Cuba. He earned his Bachelors, Masters and Ph.D. degrees in electrical engineering from the University of Miami, Florida, in 1985, 1987, and 1993, respectively. He completed his Ph.D. program under a Patricia Roberts Harris fellowship. From 1988 to 1990 Dr. Corral was a Member of the Technical Staff at Sandia National Laboratories, Albuquerque, New Mexico, where he was involved in the analysis, modeling, and design of custom circuits for piezoelectric sensor components. In 1994, he joined Scientific-Atlanta in Atlanta, Georgia, as an Associate Staff RF Engineer and worked on communication systems and specialized microwave software. In 1997 he was Senior Design Engineer at Origin Data Systems in Boca Raton, Florida, where he had multiple roles in system, hardware, and software development for a novel asset management/RFID system. Currently, Dr. Corral is a Distinguished Member of the Technical Staff in Motorola Labs, Plantation, Florida, and is involved in ultra-wideband, wideband, and propagation research. His interests include circuit and filter theory, communication systems, numerical analysis, signal processing, and constrained optimization. He has published over twenty-five journal and conference papers, has six patents filed, and two trade secrets.Dr. Corral was principal recipient of the Myril B. Reed Best Paper Award for the 40th Midwest Symposium on Circuits and Systems in 1997. Dr. Corral is also the principal recipient of the Ambrose Fleming Premium for IEE Proceedings on Circuits, Devices, and Systems, 2000. Dr. Corral is a Senior Member of IEEE and a member of Omicron Delta Kappa, Tau Beta Pi, and Eta Kappa Nu honor societies. 相似文献
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A directional filter has a passband extending fully along a straight line passing through the origin. In its original form the transformation technique, a powerful tool for designing two-dimensional FIR filters, is not useful to design such a filter. In this communication we suggest a few analytical and optimisation-based methods to design directional filters using the transformation technique. The superiority of the proposed methods over existing techniques is demonstrated. 相似文献
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一种基于CIC滤波器的有效锐化方法研究 总被引:2,自引:0,他引:2
介绍了对积分梳状滤波器(CIC滤波器)的有效锐化。所提出的锐化滤波器的结构由两个主要部分组成:一个梳状滤波器的级联部分和一个锐化滤波器部分。所提出的方案使得滤波器中锐化部分的工作速率比输入速率大为降低,其频谱响应特性比传统的也有所改进。通过MATLAB仿真,可看出改进锐化后的滤波器性能更优。 相似文献
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本文介绍了在数字下变频(DDC)中的抽取滤波器系统设计方法和具体实现方案。采用CIC滤波器、HB滤波器、FIR滤波器三级级联的方式来降低采样率。通过实际验证,证明了设计的可行性。 相似文献
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Hyun-Lark Do Byung-Woon Choi Bong-Hwan Kwon 《International Journal of Electronics》2013,100(7):385-405
Single-stage line-coupled ac/dc converter with high power factor and ripple-free input current is proposed. The proposed power factor correction circuit can achieve high power factor and ripple-free input current using a coupled inductor. Experimental results for a 400?W converter at a constant switching frequency of 100?kHz are obtained to show the performance of the proposed converter. 相似文献