以電流式主動元件實現萬用濾波器

摘要本篇論文主要探討類比電流式電路的應用，這些應用包括了電流式主動元件架構的介紹以及其實現濾波器的方法。並提出二個新的萬用濾波器:第一個是電壓模式的萬用濾波器。第二個是以KHN(Kerwin-Huelsman-Newcomb)架構實現電流訊號輸入的萬用濾波器。首先提出的電壓式萬用濾波器架構是以差動差分電流傳輸器(Differential Difference Current Conveyor, DDCC)為主動元件來建構，並用雙積分器迴路(Two-Integrator Loop)及訊號流程圖的想法，搭配傳輸零點法則(Transmission Zeros)來探討其設計及實現原理。電路架構則透過Hspice模擬軟體搭配UMC 0.5微米 2P2M製程參數來驗証可行性及特性。提出的電路架構其被動元件均接地，且適合高頻操作及積體化。論文的第二部分，介紹阻抗模擬器的設計及負電阻電路，並以模擬來驗証想法。此外，本文提出新的KHN架構的萬用濾波器，此濾波器是以電流回授放大器(Current Feedback Amplifier, CFA)，加上差分電流緩衝放大器(Current Differencing Buffered Amplifier, CDBA)來合成，並以訊號流程圖的想法來建構。透過模擬驗証，本章提出的KHN萬用濾波器可呈現出電流式電路的優點。

關鍵字

差動差分電流傳輸器； KHN濾波器；差分電流緩衝放大器

並列摘要

Abstract This thesis mainly discusses the applications of current-mode active elements. One of the applications is the structures of current-mode universal filters, and the other is the designing method of a filter. It’s proposed two new universal filters. The first one is a voltage-mode universal filter, and the second one is a universal filter with current input applying KHN (Kerwin-Huelsman-Newcomb) configuration. In this thesis, the Differential Difference Current Conveyors (DDCC’s) are used to realize the first proposed filter circuit structure. The proposed universal filter employs two-integrator Loop structure and signal flow diagram method to collocate transmission-zeros rule for explaining the design and the principle of the filter. Hspice simulator applying UMC 0.5μm 2P2M process parameter is used to simulate the characteristics and feasibility of the proposed circuit. The passive elements of the circuit are all grounded and suitable for high frequency operation and monolithic chip implementation. The second part of the thesis introduces the process of designing impedance simulators and circuits of negative resistors. Simulation results of the negative resistor circuit are used to examine the principle. Finally, this thesis employs Current Feedback Amplifier (CFA) and Current Differencing Buffered Amplifier (CDBA) to synthesize the proposed new KHN filter and construct the configuration using signal flow diagram. Hspice simulation results of the proposed KHN universal filter coincide with the theoretical results.

並列關鍵字

KHN Filter ； Current Differencing Buffered Amplifier ； Differential Difference Current Conveyor

參考文獻

[24] S. B. Li, “Design of impedance simulators, active filters, and

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[4] J. W. Horng, “Voltage-mode multifunction filter using one current feedback

[5] C. M. Chang and S. K. Pai, “Universal current-mode ota-c biquad with the

[6] B. Wilson, “Constant bandwidth voltage amplification using current

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以電流式主動元件實現萬用濾波器

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