新型多功能開關電流雙二次濾波器
A NEW MULTIFUNCTION SWITCHED-CURRENT BIQUADRATIC FILTER
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摘要: 本文提出了一種具有較低靈敏度和正反兩相輸出的開關電流(SI)改進型通用積木塊(MUB),可以實現(xiàn)抽樣數(shù)據(jù)信號處理的各種基本運算.據(jù)此,以開關電容電路為原型,采用信號流圖方法生成了一種新型SI高Q雙二次濾波器,可獲得低通、高通、帶通和帶阻等多種濾波功能。
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關鍵詞:
- 開關電流; 有源濾波器; 電路理論和設計
Abstract: A switched-current(SI) modified universal building-block(MUB) is proposed with low sensitivities as well as positive and negative outputs. Various basic operations of sampled-data signal processing can be performed by the MUB. Based on this building-block, a new SI high-Q biquadratic filter is generated from the switched-capacitor prototype by the means of signal flow graphes, which can obtain low-pass, high-pass, bandpass and band-reject filtering functions. -
Hughes J B, Bird N C, Macbeth I C. Switched currents-A new technique for analog sampled-data[2]signal processing. Proc. IEEE ISCAS. Portland, USA: 1989, 1584-1589.[3]Hughes J B, Macbeth I C, Pattullo D M. Switched-current filters. IEE Proc.-G, 1990, 137(2): 156-162.[4]Tse C K, Chun K C. IEEE Trans. on CAS-II, 1995, CAS-42(5): 356-359.[5]Gates J W, EI-Masry E I. IEEE Trans. on CAS-II, 1996, CAS-43(1): 24-30.[6]孟相如,邱關源..基于差分器的開關電流高通梯形濾波器的設計.電子科學學刊,1995, 17(1): 60-68.[7]Gregorian R, Martin K W, Temes G C. Switched-capacitor circuit design[J].Proc. of IEEE.1983, 71(8):941-966 -
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