自适应CCCII-OTA型滤波器的研究
发布时间：2018-12-27 09:00
【摘要】：在通讯范畴内解除回波、主动平衡、构成天线阵波,还有好多方面都用到了自适应滤波器。所以自适应滤波器具有重要的意义,但通过大量国内外相关文献研究之后发现,目前的自适应滤波器还存在很多的不足,如处置信号的速率不快,很低的带宽,达不到我们所设置的自适应这个效果等,考虑出了输入信号频率改变通频带,可在较宽的频率范围内、高速模拟的自适应CCCII-OTA型多功能滤波器。需要完成的主要内容是:钻研相关高性能滤波器的理论知识,利用电流模电路信号处理速度快、频带宽的优势,来设计由MCCCII(多输出电流控制电流传输器)与OTA(跨导运算放大电路)构成的不同结构的滤波器,其中MCCCII为CCCII的多输出端型。设计了(F/I)频率电流转换电路,解决了现有F/I电路频率电流转换信号频率低、速度慢的问题,最后设计了(V/I)电压电流电路;以上各部分电路有效级联实现了自适应CCCII-OTA滤波器。论文的主要工作概括如下:(1)浏览国内外相关文献,详细研究了自适应滤波器的当前发展近况、使用范畴、发展前景,同时对目前阶段的模拟自适应滤波设计方式做了归纳对照。在此基础上提出了F/I电路与CCCII-OTA滤波电路构成的自适应滤波器,实现了自适应CCCII-OTA滤波器跟踪频率高、速度快,以及以电流为变量的优点。(2)研究了电流模电路的特点,并就电流模电路的经典电路-电流传输器,做了详细的钻研、通过电流传输器的研究,得到了CCCII和OTA的基本理论和特性,并运用CCCII和OTA的特点设计了基本的运算电路。(3)主要设计了信号预处理电路,设计了频率自适应电路,频率自适应电路包括整形电路、测频电路、F/I电路,对设计的电路进行了软件仿真和实验测量。(4)主要工作是利用MCCCII的特点设计了MCCCII型不同输入不同输出方式的二阶多功能滤波器,同时结合OTA的特点,设计了由MCCCII-OTA型混合二阶多功能滤波器。对设计的各种滤波器进行了仿真和做出实物并进行测试。本文完成了具有滤波频率自适应功能的CCCII-OTA型滤波器,它实现了输入信号频率改变通频带的动态功能。它可以应用在频率测量、频率特性分析、谐波分析等信号检测领域,具有重要理论意义。
[Abstract]:In the field of communication, the echo is removed, the active balance is active, and the antenna array is formed. In addition, adaptive filters are used in many aspects. So adaptive filter has important significance, but through a lot of domestic and foreign related literature research, it is found that the current adaptive filter still has a lot of shortcomings, such as processing signal rate is not fast, very low bandwidth, The adaptive CCCII-OTA multifunctional filter can be simulated at high speed in a wide frequency range by considering that the input signal frequency can change the frequency band. The main contents to be completed are: to study the theoretical knowledge of high performance filters, to make use of the advantages of fast signal processing speed and frequency bandwidth of current-mode circuits, The filter composed of MCCCII (Multi-output Current-Controlled current conveyor) and OTA (Transconductance operational Amplifier) is designed, in which MCCCII is the multi-output type of CCCII. (F / I) frequency and current conversion circuit is designed to solve the problems of low frequency and slow speed of frequency current conversion signal in existing F / I circuit. Finally, the (V / I) voltage and current circuit is designed. All the circuits are cascaded to realize the adaptive CCCII-OTA filter. The main work of this paper is summarized as follows: (1) reviewing the relevant literature at home and abroad, studying the current development of adaptive filter in detail, using the category, development prospects, At the same time, the design method of analog adaptive filter at present stage is summarized and compared. On this basis, an adaptive filter composed of F / I circuit and CCCII-OTA filter circuit is proposed. The adaptive CCCII-OTA filter has high tracking frequency and high speed. And the advantages of taking current as a variable. (2) the characteristics of current-mode circuits are studied, and the classical current-mode circuit-current conveyer is studied in detail. The basic theory and characteristics of CCCII and OTA are obtained, and the basic operation circuits are designed by using the characteristics of CCCII and OTA. (3) the signal preprocessing circuit and the frequency adaptive circuit are designed, and the frequency adaptive circuit includes the shaping circuit. The frequency measurement circuit and the F / I circuit are simulated and measured by software. (4) the second order multifunctional filter with different input and output modes of MCCCII is designed based on the characteristics of MCCCII. At the same time, combined with the characteristics of OTA, a mixed second order multifunctional filter with MCCCII-OTA type is designed. All kinds of filters are simulated and tested. In this paper, a CCCII-OTA filter with adaptive filter frequency is completed, which realizes the dynamic function of changing the frequency of input signal. It can be used in frequency measurement, frequency characteristic analysis, harmonic analysis and other signal detection fields.
【学位授予单位】：西北师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713
本文编号：2392820
[Abstract]:In the field of communication, the echo is removed, the active balance is active, and the antenna array is formed. In addition, adaptive filters are used in many aspects. So adaptive filter has important significance, but through a lot of domestic and foreign related literature research, it is found that the current adaptive filter still has a lot of shortcomings, such as processing signal rate is not fast, very low bandwidth, The adaptive CCCII-OTA multifunctional filter can be simulated at high speed in a wide frequency range by considering that the input signal frequency can change the frequency band. The main contents to be completed are: to study the theoretical knowledge of high performance filters, to make use of the advantages of fast signal processing speed and frequency bandwidth of current-mode circuits, The filter composed of MCCCII (Multi-output Current-Controlled current conveyor) and OTA (Transconductance operational Amplifier) is designed, in which MCCCII is the multi-output type of CCCII. (F / I) frequency and current conversion circuit is designed to solve the problems of low frequency and slow speed of frequency current conversion signal in existing F / I circuit. Finally, the (V / I) voltage and current circuit is designed. All the circuits are cascaded to realize the adaptive CCCII-OTA filter. The main work of this paper is summarized as follows: (1) reviewing the relevant literature at home and abroad, studying the current development of adaptive filter in detail, using the category, development prospects, At the same time, the design method of analog adaptive filter at present stage is summarized and compared. On this basis, an adaptive filter composed of F / I circuit and CCCII-OTA filter circuit is proposed. The adaptive CCCII-OTA filter has high tracking frequency and high speed. And the advantages of taking current as a variable. (2) the characteristics of current-mode circuits are studied, and the classical current-mode circuit-current conveyer is studied in detail. The basic theory and characteristics of CCCII and OTA are obtained, and the basic operation circuits are designed by using the characteristics of CCCII and OTA. (3) the signal preprocessing circuit and the frequency adaptive circuit are designed, and the frequency adaptive circuit includes the shaping circuit. The frequency measurement circuit and the F / I circuit are simulated and measured by software. (4) the second order multifunctional filter with different input and output modes of MCCCII is designed based on the characteristics of MCCCII. At the same time, combined with the characteristics of OTA, a mixed second order multifunctional filter with MCCCII-OTA type is designed. All kinds of filters are simulated and tested. In this paper, a CCCII-OTA filter with adaptive filter frequency is completed, which realizes the dynamic function of changing the frequency of input signal. It can be used in frequency measurement, frequency characteristic analysis, harmonic analysis and other signal detection fields.
【学位授予单位】：西北师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713
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1 吉彦平;自适应CCCII-OTA型滤波器的研究[D];西北师范大学;2015年
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