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Compensation techniques for gain-bandwidth effects of active RC filters

机译:有源RC滤波器的增益带宽效应补偿技术

摘要

The gain-bandwidth (GB) product of an operational amplifier (op amp) can effect the filtering characteristics of an infinite gain, multiple feedback, low pass active RC filter. In this thesis, the characteristics of ideal op amps and actual op amps are compared. The op amp is characterized by a dominant single pole, which is used to develop a third order voltage transfer function that describes the op amp's gain-bandwidth effects on the filter. Optimization theory is used to find adjusted values for the filter's elements to compensate for these GB effects. Of the sixty-five compensation design methods examined with the optimization program GOSPEL, twelve methods produced useful compensation results. The adjusted element values are tabulated and displayed in design graphs for several values of GB and quality factor, Q. The twelve design techniques were verified by simulating the filter with the adjusted element values using PSpice.
机译:运算放大器(运算放大器)的增益带宽(GB)乘积可影响无限增益,多反馈,低通有源RC滤波器的滤波特性。本文比较了理想运算放大器和实际运算放大器的特性。运算放大器的特征在于具有优势的单极点,该极点用于产生三阶电压传递函数,该函数描述了运算放大器对滤波器的增益带宽效应。优化理论用于找到滤波器元素的调整值,以补偿这些GB效应。在使用优化程序GOSPEL检查的65种补偿设计方法中,有12种方法产生了有用的补偿结果。将调整后的元素值制成表格并显示在设计图中,以显示GB和质量因子Q的几个值。通过使用PSpice用调整后的元素值模拟滤波器,验证了十二种设计技术。

著录项

  • 作者

    Paschal Matthew James 1964-;

  • 作者单位
  • 年度 1992
  • 总页数
  • 原文格式 PDF
  • 正文语种 en_US
  • 中图分类

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