以第二代電流傳輸器設計電流式/電壓式二階萬用濾波電路

Design of universal current-/voltage-mode biquads employing the CCⅡs

張建隆(Chien-Lung Chang)

指導教授 ： 張俊明

中原大學/工學院/電機工程研究所/碩士(2001年)

https://doi.org/10.6840/cycu200100116

摘要

摘要
本論文是以第二代電流傳輸器CCII為主動元件設計六個電流式/電壓式二階濾波電路。

在電流式二階濾波電路部分
首先，提出電流式三輸入一輸出萬用濾波電路，共使用兩個CCII主動元件，二個接地電容，二個接地電阻。在此值得注意的是，本電路不需任何阻抗匹配條件，不需電流倍數調整及反向電流調整就可實現電流式五種濾波訊號。
其次，提出兩個不需阻抗匹配電流式正交可調單輸出與三輸出萬用濾波電路，使用三個CCIIs，二個接地電容，及三個接地電阻。

在電壓式二階濾波電路部分
首先，提出電壓式二/一輸入四輸出萬用濾波電路，共使用二個CCIIs，二個接地電容，二個接地電阻與二個浮接電阻。這個電路首次不需額外的電壓式加法電路便可實現五種電壓式濾波訊號。
其次，提出可同時從五輸出端點實現五種電壓式濾波訊號的電壓式正交可調萬用濾波電路。此電路使用了一個接地電容，一個浮接電容，四個接地電阻及二個浮接電阻，其角頻率與品質因素可經由其中二個接地電阻調整。

在電流式/電壓式二階濾波電路部分
我們提出一個具有下列優點的二階濾波電路：同一架構下具有電流式正交可調單輸出/三輸出萬用濾波電路與電壓式正交可調單輸出/三輸出濾波電路，使用三個compound CCIIs，二個電容，三個或四個電阻。

最後，筆者以Pspice模擬方式來驗證電路之可行性，其結果與Matlab所估算之理論值皆相當接近。

關鍵字

主動濾波電路 ； 萬用濾波電路

並列摘要

Abstract
In this thesis, we successfully propose six novel current-/voltage-mode biquad filters by employing the CCII(s).

In the part of current-mode biquad filters:
First, a novel universal current-mode second-order filter with three inputs and one output employing two CCIIs, two grounded capacitors, and two grounded resistors is presented. Note that we don’t need any inverting-type or double-magnitude input current signals, and any component matching conditions for realizing the five generic filter functions.
Secondly, two novel current-mode second-order filters with three/two inputs and one/three output(s) employing three CCIIs, two grounded capacitors and three grounded resistors are presented. No component matching conditions are used in these two circuits which enjoy the orthogonal control ofω0 and Q.

In the part of voltage-mode biquad filters:
First, we propose a novel universal voltage-mode second-order filter with two/one input(s) and four outputs employing two CCIIs, two grounded capacitors, two grounded resistors and two floating resistors. It is the first time to propose a universal voltage-mode second-order filter for realizing five generic voltage–mode filter signals without any voltage-mode adders.
Secondly, we propose a “five”-output voltage-mode filter employing three CCIIs ,one grounded capacitor, one floating capacitor, four grounded resistors and two floating resistors, which can simultaneously realize five generic voltage–mode filter signals from five output terminals. It is the first “five”-output voltage-mode filter circuit and enjoys the orthogonal control of the ω0 and Q through separate two grounded resistors.

In the part of current-/voltage-mode biquad filter:
we propose a universal current-mode biquad filter with three/one input(s) and one/three output(s) which can be acted as, in the meanwhile, a multifunction voltage-mode biquad filter with three/two inputs and one/three output(s) by employing three compound CCIIs, two capacitors, and three/four resistors.The proposed circuit enjoys the orthogonal control of the ω0 and Q.

Finally, we verify the feasibility and accuracy of the proposed circuits by using Pspice. The simulation results agree very well with the theoretical predictions.

並列關鍵字

active filter ； universal filter circuit

參考文獻

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