- 學位論文
以電流式主動元件設計一階全通濾波電路及多功能二階濾波電路
Design of first order all-pass filters and multifuction biquadratic filters employing active current-mode elements
摘要
摘 要 本論文將對一階全通濾波電路及二階多輸出之濾波電路提出新的電路設計。論文中使用到多輸出端之第二代電流傳輸器--MO-CCII、多輸出端第三代電流傳輸器--MO-CCIII 、電流追隨器—CF及電壓差動電流傳輸器--DVCC和DDCC作為主動元件設計一階及二階電流式/電壓式濾波電路。 在一階全通濾波電路部分 共提出三個一階全通濾波電路。首先，我們提出的第一個電路乃為電壓式電路，使用一個單端負型的第二代電流傳輸器(second-generation current conveyor)、一個浮接電容及兩個浮接電阻和一個接地電阻。第二個電路為電流式電路，使用一個雙輸出端的電流追隨器CF(Current Conveyor)及一個接地電容和兩個接地電阻。最後提出的第三個電路也為電流式電路，共使用了一個第三代電流傳輸器(third-generation Current Conveyor)與一個接地電容及兩個接地電阻。 在二階濾波電路部分 共設計了兩個電壓式二階濾波電路。首先，我們先提出一個電壓式一輸入三輸出的二階濾波電路。此電路使用了兩個單端正型的電壓差動電流傳輸器—DDCCs與兩個接地電容及兩個接地電阻。 然後為了實現多輸出電路的夢想，我們於本篇論文的最後提出一個兩輸入四輸出且為正交可調整的電壓式二階濾波電路。本電路共使用兩個差動電流傳輸器--DVCCs、兩個接地電容、兩個接地電阻和兩個浮接電阻，在單一輸入時可實現低通、帶通、高通、帶拒等四種濾波訊號，在兩輸入時可以實現全通濾波訊號。 在本文中所提出的電路皆以Pspice來驗證電路之可行性，其結果與Matlab所估算之理論值相當的接近。
並列摘要
Abstract In this paper , some new first-order all-pass filters and voltage-mode multifunction second-order filters are presented. We will use second-generation current conveyors , third-generation current conveyors , differential voltage current conveyors , or differential difference current conveyors to design filters. In the part of first-order all-pass filters： First ,we present a voltage-mode filter using a single second-generation current conveyor , a floating capacitor , two floating resistors and a grounded resistor . Then , the second proposed filter is a current-mode filter using a dual-output current follower , a grounded capacitor and two grounded resistors . At last , the third proposed filter is also a current-mode filter . It uses a multi-output third-generation current conveyor , a grounded capacitor and two grounded resistors . In the part of second-order filters： There are two filters presented in this part . First , A voltage-mode multifunction biquadratic filter with single input and three outputs employing two differential difference current conveyors , two grounded capacitors and two grounded resistors is presented . The next proposed filter is a voltage-mode multifunction biquadratic filter with two inputs and four outputs using two differential voltage current conveyors , two grounded capacitors , two grounded resistors and two floating resistors . If we give a single voltage input signal , it will realize low-pass , band-pass , high-pass and notch filtering signals . If we give two voltage input signals at the same time , it will realize an all-pass filtering signal . No requirement of critical component matching conditions and orthogonal control of and Q are the advantageous features of the proposed circuit . Finally , We use Pspice to simulate all of the proposed circuits to confirm the theoretical prediction .