Abstract
A new analogue sampled-data active device, named as a switched-current operational amplifier (SIOA), is presented. The use of active circuit elements may simplify drawing the circuit diagram significantly greatly and may permit easier analysis and synthesis of SI networks. A number of all pole and elliptic (second- or third-order) switched-current (SI) filters are derived from the switched capacitor prototypes. These can be used as simple, self-contained filters or as filter sections in the cascaded realizations of a higher order transfer functions. To illustrate the approach, a fifth-order low-pass filter is designed.
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Project supported by the National Natural Science Foundation of China
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Jie, W. Switched-current filter design using cascaded sections. J. of Electron. (China) 10, 273–278 (1993). https://doi.org/10.1007/BF02684558
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DOI: https://doi.org/10.1007/BF02684558