减小SC滤波器中GB效应的新结构
NEW STRUCTURE OF SC FILTERS WITH REDUCED GB EFFECT
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摘要: 本文讨论了在开关电容(SC)滤波器中如何减少增益带宽积(GB)效应的问题,提出了一个减少GB效应的新的双二次拓扑结构,此结构对寄生电容不敏感,并且具有很低的无源W0,Q灵敏度。以低通SC滤波器为例,给出了减小GB效应的具体设计方法。并用设计实例和实验结果证明了所得结论的正确性。
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关键词:
- 滤性器; SC滤波器; GB效应
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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