減小SC濾波器中GB效應(yīng)的新結(jié)構(gòu)
NEW STRUCTURE OF SC FILTERS WITH REDUCED GB EFFECT
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摘要: 本文討論了在開關(guān)電容(SC)濾波器中如何減少增益帶寬積(GB)效應(yīng)的問題,提出了一個(gè)減少GB效應(yīng)的新的雙二次拓?fù)浣Y(jié)構(gòu),此結(jié)構(gòu)對(duì)寄生電容不敏感,并且具有很低的無源W0,Q靈敏度。以低通SC濾波器為例,給出了減小GB效應(yīng)的具體設(shè)計(jì)方法。并用設(shè)計(jì)實(shí)例和實(shí)驗(yàn)結(jié)果證明了所得結(jié)論的正確性。
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關(guān)鍵詞:
- 濾性器; SC濾波器; GB效應(yīng)
Abstract: In this paper, the problem how to reduce the GB effect in SC filter is discussed. A new general biquadratic SC structure in which the GB effect is reduced is developed. The structure is strays-insensitive, has very low W0and Q sensitivities. Using the low-pass SC filter for example, the method of reducing GB effect has been shown in detail. -
E. Sanchez-Sienencio, IEEE Trans. on CAS, CAS-31(1984), 876-883.[2]B. B. Bliattacharyya, IEE Proc. Pt. G, 130(1983), 114-123.[3]M. S. Ghausi, K. R. Laker, Modern Filter Design; Active RC and Switched Capacitor, Prentic-Hall, Inc.[4]Englewood Cliffs. NJ, 1981.[5]J. C. M. Bermudez, B. B. Bhattacharyya, IEEE Trans. on CAS, CAS-32(1985), 767-783.[6]K. Martin, IEEE Trans. on CAS, CAS-27(1980), 515. -
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