《基于ORCAD的模拟滤波器设计》-毕业论文.doc

结　论 PAGE 基于ORCAD的模拟滤波器设计 摘 要 随着现代电子电路技术的发展，模拟滤波器已成为高精度大规模集成电路中的一个基本模块，滤波器参数选择的好坏将在一定程度上影响整个系统的工作稳定性和噪声指标的好坏。电流模式滤波器的出现于电压模式滤波器之后，它与传统模式的电压模式滤波器相比具有低输入阻抗，高输出阻抗，波动范围大，功耗低，速度快，频带宽，非线性失真小等优点。因此，本文选择对基于电流控制传送器的模拟滤波器设计。 由于滤波器参数，种类繁多，计算和设计都有一定困难。近年来随着CAD和EDA技术的不断发展，为我们分析和设计有源滤波器提供了简单、快捷的方法。ORCAD正是这样一种电路分析软件。本文是基于ORCAD的电流模式的模拟滤波器设计。首先，以二阶带通滤波器的分析优化为例，阐述了用ORCAD对模拟滤波器电路进行分析和优化的过程，给出了具体的分析优化的操作步骤、性能分析曲线、优化结果。然后，应用电流模式模拟滤波器的设计方法设计出适用于单片集成的滤波器电路，最后，采用ORCAD进行分析、仿真和优化调整。 关键词：滤波器，电流控制传送器， ORCAD 仿真， ORCAD优化  The design of Analog Filters Based on ORCAD ABSTRACT With the development of modern electronic circuit technology, Analog Filter has become a basic module in high-precision VLSI. The choice of filter parameters will greatly affect the stability and noise indicators quality of the whole system. Current-mode filters turn up after the voltage-mode filters. Current-mode filters，comparing with voltage-mode filters, have following advantages: Low input impedance and high output impedance, big fluctuation range, low power consumption, quick speed, long frequency bandwidth, little non-linear error propagation properties, small non-linear distortion. Therefore, the present paper chooses to design current pattern filter. The calculation and design of filters is every difficult because of numerous parameters and kinds. In recent years, with the CAD and EDA technology developed, the various circuit analysis software functions become more powerful. A simple and quick method was provided for anglicizing and designing APF. ORCAD is such circuit analysis software. This paper is the design of simulation filter based on ORCAD. Firstly, taking the optimization analysis of a second-order band-pass filter for example, the procedure of Optimization by using ORCAD software was demonstrated. Analysis steps of optimize operating, the curve of performance analysis, and optimization results were presented in the paper. Then, filters circuits which are used the single chip