以電流回授放大器設計三輸入單輸出之萬用二 階電壓式濾波電路

Universal biquadratic voltage-mode filter with three inputs and a single output using current feedback amplifiers

蘇宸鋒(Chen-Feng Su)

指導教授 ： 張俊明

中原大學/電機資訊學院/電機工程研究所/碩士(2016年)

https://doi.org/10.6840/cycu201600352

摘要

本篇論文主要以電流回授放大器(Current Feedback Amplifier，簡稱
CFA ) ，來實現萬用主動電壓式濾波器，此為研究目標並提出後面的設計方
法，利用主動元件的特性完成矩陣關係式。
電路架構的主動元件為電流回授放大器，傳統的電路架構主要以運算放
大器為主動元件，存在著增益頻寬積為定值之缺點，使得高增益時無較大頻
寬，CFA 採「電流回授」的方式，可提供與增益值無關的高頻寬。
本論文所設計的電路以 1MHz 為其工作頻率，電路模擬採用 H-Spice，搭
配 TSMC 0.35um 製程進行模擬與理論驗證。並以元件靈敏度傾向，進行電路
最佳化情況模擬，使輸出更符合特性且趨於精準。最後，期待本論文所設計
的萬用濾波電路，日後能做成積體電路，論文內容具有很好的參考價值。

關鍵字

CCII 、CFA、H-SPICE

並列摘要

The purpose of the study was to develop universal voltage active
filters by CFA (Current Feedback Amplifier). The thesis proposed
the way of using the feature of active component to achieve matrix
relationship.
In this study, the active component of circuit structure was to
use CFA to replace OPA, which has been used in the traditional
circuit structure. Compared the difference between OPA and CFA, OPA
have the problem that the Gain Bandwidth Product is a constant
value. When the circuit structure is in high-gain status, it
doesn’t have large bandwidth. On the contrary, CFA use the way of
「Current feedback」, which could offer high bandwidth and will not
be affected by gain value.
The design of the circuit was to use 1 MHz as its operating
frequency, H-Spice for the circuit simulation, and with TSMC 0.35
um to execute the simulation and to verify the theory. Used the
sensitivity characteristics of the component to maximize the
circuit simulation and to make the output more precisely.
In the end, hope the design of Universal filter in this study
may be manufactured for integrated circuit in the future. This
study could provide a good reference.

並列關鍵字

CCII 、CFA、H-SPICE

參考文獻

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[7]M.Alami and A.Fabre,”Insensitive current-mode bandpass filter implemented

[8]A.Fabre,”Third-generation current conveyor:a new helpful active

[10] C. M. Chang, : “Multifunction biquadratic filters using current conveyor”, IEEE

[11] C.-M. chang “Current mode allpass/notch and bandpass filter using single ccll”