以FDCCII及VF設計多功能二階濾波電路

Design of Versatile Biquads with A Single Fully Differential Second-generation Current Conveyor and A Voltage Follow

王境良(Ching-Liang Wang)

指導教授 ： 張俊明

中原大學/工學院/電機工程研究所/碩士(2003年)

https://doi.org/10.6840/cycu200300573

摘要

摘 要

本論文將針對「電流式」二階濾波電路與「電壓式」二階濾波電路各提出一個更簡化的設計。

在「電流式」二階濾波電路部份，本文提出以「單一」完全差動第二代電流傳輸器(Fully Differential Second-generation Current Conveyor，以下簡稱FDCCⅡ)為主動元件設計之電流式兩輸入三輸出或三輸入一輸出二階萬用濾波電路。這個電路使用一個多輸出端之FDCCⅡ為主動元件，兩個接地電容器及兩個接地/虛接地電阻器。

在「電壓式」二階濾波電路部分，本文提出以單一個FDCCⅡ與一個電壓追隨器(Voltage Follower，以下簡稱VF)為主動元件及四個被動元件設計之一輸入三輸出及兩個差動輸出之二階多功能濾波電路。

這兩個電路並具有以下之優點： 1.完全無須元件匹配條件， 2.可由同一結構產生低通、帶通、高通、帶拒及全通濾波信號， 3.不需反向電流調整及反向電壓、倍數電壓調整， 4.濾波器參數ωo與ωo/Q值可經由不同的兩個電阻調整， 5.使用兩個接地電容器利於積體電路之製作， 6.低的主、被動元件靈敏度， 7.具直接可串接特性及 8.具較簡單的電路結構。

關鍵字

主動濾波器 ； 電流式電路 ； 電流傳輸器

並列摘要

Abstract

Two new simpler versatile current/voltage-mode biquads are proposed in this thesis.

First, a universal current-mode biquad with two inputs and three outputs or three inputs and one output using a single fully differential second-generation current conveyor (FDCCⅡ) and four grounded/virtually-grounded passive elements is proposed. Then, the other voltage-mode biquad with a single input and three outputs, and two differential-voltage outputs using one FDCCⅡ, one voltage-follower(VF), and four passive elements is proposed.

Both proposed circuits have the following advantageous features: simultaneous realization of five generic filter signals from the same configuration without any component matching conditions, no requirements of any cancellation constraints, orthogonal adjustment of ωo/Q and ωo through two separate resistors, employment of two grounded capacitors ideal for integrated circuit implementation, very low active and passive sensitivities, cascadability and simpler circuit structures.

並列關鍵字

active filters ； current conveyors ； current-mode filters ； FDCCII

參考文獻

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