新型多功能开关电流双二次滤波器
A NEW MULTIFUNCTION SWITCHED-CURRENT BIQUADRATIC FILTER
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摘要: 本文提出了一种具有较低灵敏度和正反两相输出的开关电流(SI)改进型通用积木块(MUB),可以实现抽样数据信号处理的各种基本运算.据此,以开关电容电路为原型,采用信号流图方法生成了一种新型SI高Q双二次滤波器,可获得低通、高通、带通和带阻等多种滤波功能。
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关键词:
- 开关电流; 有源滤波器; 电路理论和设计
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,邱关源..基于差分器的开关电流高通梯形滤波器的设计.电子科学学刊,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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