高階混合模式主動濾波器與電容放大器設計

Design of High-Order Mixed-Mode Active Filter and Capacitor Multiplication

魏坤祥(Kun-Xiang Wei)

指導教授 ： 黃育賢 ； 陳建中

國立臺北科技大學/電資學院/電腦與通訊研究所/碩士(2008年)

https://doi.org/10.6841/NTUT.2008.00215

摘要

本論文目的為使用最少元件完成電路功能，所以提出新的理論、新的架構和新的主動元件。本論文的研究重點分為三大部份。
第一部份：提出轉導、轉阻模式的線性轉換理論。利用新提出來的理論使線性轉換理論原本只能作單電路有電壓模式或電流模式濾波器功能，擴充單電路同時擁有電壓模式、電流模式、轉阻、轉導模式濾波器功能。
第二部份：提出2個新的主動元件，電流追隨傳輸器(Current Following Conveyor ,CFC)與電流追隨轉導放大器(Current Following Transconductance Amplifier ,CFTA)。利用提出來的新元件應用在混合模式濾波器，使得主動元件數目與被動元件數目達到最少。並且用MOS實現在電路上，証明所提出來的理論是可用。且用此方法可達到n階混合濾波器只需要n個主動元件與1個輸入端，優於目前的高階混合模式濾波器。
第三部份：提出新型的電容放大器。利用本論文所提出的新元件CFTA應用在電容放大器上。

關鍵字

混合模式 ； 線性轉換 ； 濾波器 ； 電容放大器

並列摘要

The purpose of this thesis is achieving the function of the circuitry with the least device; as a result, we have proposed new theory, new structure, and new active device. Mainly, the overview of this thesis can be divided into three parts as shown below.
The first part, this thesis has proposed the transconductance-mode and transresistance -mode linear transformation theories, respectively. By using the proposed new theories to extend the function of circuitry, which include the voltage-mode filter, current-mode filter, transconductance-mode filter, and transresistance-mode filter; note that the traditional linear transformation theory can be realized as voltage-mode and current-mode filter in single circuitry originally.
The second part is proposing two active devices such as Current Following Conveyor (CFC) and Current Following Transconductance Amplifier (CFTA). Consequently, these new devices are applied for high-order mixed-mode filter; also, the filter has used the least active device and passive components. Besides, the proposed theory can be verified validily in terms of implementation in transistor level circuitry. Furthermore, by using this topology, the nth-order mixed-mode filter just consists of n active devices and one input terminal; therefore it performs better than other high-order mixed-mode filter.
Finally, a new type capacitor multiplication has been proposed. And the capacitor multiplication can be realized by employing CFTA, the new proposed device mentioned previously.

並列關鍵字

Mixed-mode ； linear transformation ； filter ； capacitor multiplication

參考文獻

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