以差動差分電流傳輸器為主動元件設計電壓式四階帶通濾波器

Design of Voltage-Mode Forth-Order Bandpass Filter Employing DDCCs

廖振谷(Zhen-Gu Liao)

指導教授 ： 張俊明

中原大學/工學院/電機工程研究所/碩士(2009年)

https://doi.org/10.6840/cycu200900766

摘要

摘要
　　近幾十年來，以電流傳輸器(Current Conveyor)設計主動濾波電路已受到國際學者廣泛的注目與研究。本文提出濾波電路使用一種特別的電流式主動元件：差動差分電流傳輸器(Differential Difference Current Conveyor；DDCC) 來設計電壓式四階帶通濾波電路。
　　研究如何使電路輸出信號精準是電路設計首要目標，在此我們以分析合成法(Analytical Synthesis Method；ASM)設計四階帶通濾波電路。此電路使用四個DDCC、四個接地電阻及四個接地電容組成，且輸出信號具備極高的精準度，不僅降低非理想效應，且維持良好輸出信號為本電路之價值所在。
　　本論文電路模擬部分是以H-SPICE電腦軟體進行電路模擬，搭配使用TSMC 035μm為製程參數，並以MATLAB電腦軟體進行理論與模擬結果的驗證。由模擬結果可看出此電路特性與優點，包括：
1. 使用較少主動元件。
2. 使用較少被動元件。
3. 被動元件均接地，以降低寄生效應。
4. 電路操作頻率範圍大且維持優良之濾波特性。

關鍵字

差動差分電流傳輸器 ； 帶通濾波器 ； 類比 ； 濾波器

並列摘要

Abstract
　　Active filter design by using current conveyor has received much attention in recent several decades. The circuit we publish on this paper uses a special current mode active element, namely differential difference current conveyor (DDCC) ,and use DDCCs to design the 4th voltage mode bandpass filter.

　　In order to let the output signal to be accurate is always the circuit design primary goal. We use the method “Analytical Synthesis Method (ASM)” to design 4th bandpass filter. This circuit is employing four DDCCs, four grounded resistors and four grounded capacitors. The accuracy of the output signal still maintain the high level. The advantage of this circuit is takes high performance in output signal.

　　The filtering performance of the new 4th voltage mode bandpass filter by the TSMC 035μm H-SPICE simulation. Compared with the theoretical by MATLAB. The simulation result can verify that that the circuit has the following advantages:
1. Using the least number of active component counts.
2. Using the least number of passive component counts.
3. All passive components are grounded (reducing the total parasitic effects).
4. The circuit takes wide frequency range and high performance.

並列關鍵字

analog ； filter ； DDCC ； bandpass

參考文獻

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[5] K. C. Smith and A. Sedra, “The current conveyor-a new circuit building block”, IEEE Proc, vol. 56, pp. 1368-1369, 1968.

[6] K. C. Smith and A. Sedra, “A second-generation current conveyor and it’s applications”, IEEE Trans., CT-17, pp. 132-134, 1970.