以OTA為主動元件設計數位可程式萬用二階濾波器

以往的電壓式濾波電路沒有一個是數位可程式化(數位可程式化是指可以控制電路，輸出多種結果)，原因在電壓式濾波器的訊號加減上需要額外的加法器及減法器才能達成訊號的加減，導致電壓式濾波電路結構很複雜，而本論文的設計使電壓式訊號也能藉由簡單的開關來達成訊號的加減，輸出五種濾波訊號，實現數位可程式化的功能。同時，在有關濾波器設計方面的論文上，以往只會使用一個分析設計法設計一種輸出的電壓式濾波電路，然而本論文使用一個分析設計法來設計了五種輸出的電壓式濾波電路。由上述，提出一個新的電路設計，使用OTA為主動元件設計數位可程式電壓式萬用二階濾波電路，同時此電路還擁有幾項優點，所有的OTA皆是單端輸入，所有電容皆為接地電容，而且使用最少的主動元件和最少的被動元件來完成電路設計。最後為了驗證設計之電路，使用H-spice進行模擬，製程參數使用的是TSMC-0.35μm，操作頻率為1MH。而模擬有下列幾種，分別是振幅與相位角頻率響應模擬、穩定度測試模擬、敏感度(靈敏度)模擬、蒙地卡羅模擬、線性範圍與動態範圍模擬、雜訊模擬、交互干擾頻譜模擬。

關鍵字

運算轉導放大器；電壓式濾波器；多功能濾波器；分析設計法

並列摘要

None of the recently reported voltage-mode versatile filters is digitally programmable like application of easy addition of current-mode filtering signals to do the synthesis. And none of the recently reported Analytical Synthesis Methods is used for the realization of a multifunction filter. Both the above two induced motivations of researches have been merged, developed, and solved in this brief on the voltage-mode OTA-C universal biquad filter which still achieves many advantages like the employments of all sigle-ended-input OTAs, all grounded capacitors, and the least number in addition to have an controllable gain, a cascadable input terminal, and no need to impose component matchongs. To verify the theoretical analysis of the voltage-mode OTA-C universal biquad, the TSMC035 H-Spice using the 1MHz operating frequency. And this paper have 9 different simulations. Those are frequency response, power loss, Monte Carlo, sensitivity, stability, linearity and dynamic range, interactive modualation frequency, and noise and signal to noise ration.

並列關鍵字

OTA ； Voltage Mode filter ； Universal voltage-mode filter ； Analytical Synthesis Methods

參考文獻

[6] C. M. Chang, "New multifunction OTA-C biquads", IEEE: Trans. Circuits and Syst.-I, vol. 46, no. 6, pp. 820-824, June 1999.

[1] C.M. chang, and B.M. Al-Hashimi, "Analytical synthesis od current-mode high-order OTA-C filters", IEEE Trans. Circuits and Syst.-I, vol. 50, no.9, pp.1188-1192, Sept. 2003

[3] E. Sanchez-Sinencio, R.L. Geiger, and Nevarez-Lozano, "Generation of continuous-time two integrator loop OTA filiter structure", IEE: Trans. Circuits and Syst., vol.35, no.8, pp.936-946, Aug. 1988

[4] Y. Sun, "Second-order OTA-C filters derived from Nawrocki-Klein biquad"Electron. Lett., vol. 34, no. 15, pp. 1449-1450, July 1998.

[5] J. W. Horng, "Voltage-mode universal biquadratic filter with one input and five outputs using OTAs", Int. J Electron., vol. 89, no. 9, pp. 729-737, Sep. 2002.

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以OTA為主動元件設計數位可程式萬用二階濾波器

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