以運算轉阻放大器、電阻器(或MOS電晶體)、及電容器設計電壓式二階萬用濾波電路

Design of universal voltage-mode biquadratic filters with OTRAs, Resistors (or MOS transistors) and capacitors

蘇俊達(Chung-Da Su)

指導教授 ： ARRAY(0xa5d3c40)

中原大學/工學院/電機工程研究所/碩士(2010年)

https://doi.org/10.6840/cycu201000411

摘要

近年來，運算轉阻放大器(OTRA)成為熱門的研究對象。主要在於這種主動元件具有與運算轉導放大互為對偶性、輸出入阻抗較小以及輸入端虛接地的特性。
本論文所提出的電路主要是二階電壓式萬用濾波電路，是以節點分析設計法(Design of Nodal Analytical Method)設計完成。本論文提出的電路具有三個輸入及一個輸出，在不改變電路結構條件下，可實現低通、高通、帶通、帶拒以及全通五種濾波電路。其中，使用三個OTRA作為主動元件、八個電阻及兩個電容作為被動元件。電路積體化也是本論文的重點，因此參考過去學者所提出的方法將MOS取代電阻。發現MOS產生的輸出信號較原來電阻精準，也就是以MOS取代電阻有利於電路基體化的實現。另外，較少元件不僅提高輸出精準度、有較小電路面積、功率消耗較小、低成本，也使整體電路具有較低敏感度的特性。最後，本論文所提出的電路是以電路軟體H-spice進行模擬，所使用製程參數為TSMC035μm，並於模擬結果與理論相互得到驗證。

關鍵字

運算轉阻放大器 ； 二階電壓式萬用濾波器 ； 敏感度分析

並列摘要

Recent years, operational transresistance amplifier (OTRA) has become a very popular topic for research. This active component has properties of dual relationship with operational transconductance amplifier (OTA), smaller impedances in input and output, and grounding virtually in input.
In this paper, the proposed circuit is mainly realized employing a second order voltage-mode universal filter, and performed by Design of Nodal Analytical Method. The proposed circuit has three inputs and one ouput, and it is fulfilled with five filter functions; that is low-pass, high-pass, band-pass, band-reject, and all-pass in unchanging circuit structures. And it also uses three OTRA as active components, eight resistors, and two capacitors as passive components. On the other hand, the integration of circuit is also the important issue in this paper, referring the past methods by scholars and substitute MOSFET to resistors. The output signals have more high precisions with MOSFET than resistors, so it means that there is an advantage to complete circuit integration with MOSFET. What’s more, few components not only lift higher output precisions, smaller circuit areas , smaller power consumptions but have lower sensitivities in total circuit. Finally, the proposed circuit of this paper is simulated using TSMC035μm process parameters, and validated by simulation results and theoretical ones.

並列關鍵字

OTRA ； Sensitivity Analysis ； Second Order Voltage-Mode Universal Filter

參考文獻

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