摘要
A new analogue sampled-data active device, named as a switched-current operationalamplifier (SIOA), is presented. The use of active circuit elements may simplify drawing the circuitdiagram significantly greatly and may permit easier analysis and synthesis of SI networks. Anumber of all pole and elliptic (second-or third-order) switched-current (SI) filters are derivedfrom the switched capacitor prototypes. These can be used as simple self-contained filters or asfilter sections in the cascaded realizations of a higher order transfer functions. To illustrate theapproach, a fifth-order low-pass filter is designed.
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.
基金
Project supported by the National Natural Science Foundation of China
