以運算轉阻放大器設計電壓式單輸入三輸出多功能二階濾波電路

OTRA-Based Voltage-Mode Biquadratic Filter with a Single Input and Three Outputs

許智貴(Chih-Kuei Hsu)

指導教授 ： 張俊明

中原大學/工學院/電機工程研究所/碩士(2010年)

https://doi.org/10.6840/cycu201000307

摘要

摘要
近來，專心致力於使用OTRA(operational transresistance amplifiers)來做設計引起很大的關注。最主要的原因就是OTRA(operational transresistance amplifiers)無迴轉率的限制，輸入端和輸出端阻抗非常低，且輸入端虛接地降低了寄生效應的影響。
本論文是以運算轉阻放大器為主動元件，並以節點分析設計法( Design of Nodal Analytical Method )來設計一個電壓式二階濾波電路。本文提出的單輸入三輸出電壓式濾波電路，在不需改變任何電路結構的情形下，可實現低通、帶通、高通三種濾波信號。論文中主要是以三個OTRA、六個電阻及兩個電容即達成三種濾波電路之功能。電路積體化的實現也是本篇論文的重點，因此我們參考著名學者的論文將電阻轉換成MOS電晶體並進行模擬，發現其結果與未換成MOS電晶體結果差不多，較少元件使得功率消耗低、雜訊較少、電路面積小及低成本，相當有利於電路之積體化製造。主要優點不但輸出精準、電路精簡及低成本，同時具有主動元件及被動元件低敏感度之優點，最後，對於本論文所提之電路，均以H-spice軟體進行電路模擬，所使用製程參數為TSMC035μm，並於實際模擬結果與理論之間相互得到驗證。

關鍵字

巴特沃茲濾波器 ； 運算轉阻放大器

並列摘要

Abstract
Recently, great interest has been devoted to the design of the operational transresistance amplifiers(OTRA) because the slew rate of the operational transresistance amplifiers(OTRA) is not limited, both the input and the output terminals impedances are low, and grounding virtually at the input terminals lower the effect of the parasitic capacitance.
This paper is mainly to realize a Voltage-Mode Filter structure employing operational transresistance amplifiers(OTRA) with Design of Nodal Analytical Method. The proposed circuit simultaneously realized low-pass, band-pass, high-pass signals from the same configuration. In this paper, the voltage-mode filter with single input and three outputs is presented by using three operational transresistance amplifiers(OTRA), six resistors, and two capacitors. It is also the point to make this circuit to be integrated, we substitute MOSFET for resistor and simulation by referring the page of famous scholar. The result is almost the same as have not change resistor yet. Few components make lower power consumption,less noise,smaller circuit area,and low cost. They are helpful for manufacturing in circuit integration. The main advantages for few components not only has precise output result, circuit simpler,and low cost.Meanwhile,they also have low sensitivity for active and passive components. Finally, the proposed circuits(process parameters used by TSMC035μm) of this paper were simulated by H-spice software and have validated with practical simulation results and theory.

並列關鍵字

Butterworth Filter ； OTRA

參考文獻

[2] Ali TOKER, Ece O. G. and Serder Ö, “New high-Q bandpass filter configuration using current conveyor based all-pass filters”, IEEE Trans. Circuit Theory, 0-7803-7057-0 pp.165-168, 2001.

[4] M. Bialko and R. W. Newcomb, “Generation of All Finite Linear Circuits Using Integrate DVCCS”, IEEE Trans. on Circuit Theory, vol. 18, No. 6, pp.733–736. Nov. 1971.

[6] W. Chiu, S. I. Liu, H. W. Tsao, and J. J. Chen, “CMOS differential difference current conveyors and their applications,” IEE Proc.-Circuit Device Syst., 143,(2), pp.91-96, 1996.

[7] A. El-Adawy, A. M. Soliman, and H. O. Elwan, ‘‘ A novel fully differential current conveyor and applications for analog VLSI’’, IEEE Trans. Circuits Syst. II, 47, (4), pp. 306-313, 2000.

[8] J.-J. Chen, H.-W. Tsao, and C.-C. Chen, “Operational Trans-Resistance Amplifier Using CMOS Technology”, Electron. Lett. vol.28 no.22, 22nd October 1992.