減小SC濾波器中GB效應的新結構
NEW STRUCTURE OF SC FILTERS WITH REDUCED GB EFFECT
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摘要: 本文討論了在開關電容(SC)濾波器中如何減少增益帶寬積(GB)效應的問題,提出了一個減少GB效應的新的雙二次拓撲結構,此結構對寄生電容不敏感,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效應的具體設計方法。并用設計實例和實驗結果證明了所得結論的正確性。
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關鍵詞:
- 濾性器; SC濾波器; GB效應
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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