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Systematic Design of nth-order Voltage-mode Low-pass Filters Based on CCII

Shen Guang-Di

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Abstract

The authors presents a systematic theory and method of designing nth-order CCII (second generation current conveyor) filter with multiple-loop feedback. Various kinds of filter structures can be produced according to this theory and method. The produced filter is constructed by 2n CCIIs, n capacitors and 2n resistors. Because the input signal is only joint to circuit from y terminal of CCII, the filters have very high input impedance. Because all the RC elements are connected to ground, the filters are integrated conveniently. The design example of 4th-order Butterworth filter whose cutoff frequency is 1 MHz and its computer PSPICE simulation results are also given.

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What this paper is about

The authors presents a systematic theory and method of designing nth-order CCII (second generation current conveyor) filter with multiple-loop feedback. Various kinds of filter structures can be produced according to this theory and method. The produced filter is constructed by 2n CCIIs, n capacitors and 2n resistors. Because the input signal is only joint to circuit from y terminal of CCII, the filters have very high input impedance. Because all the RC elements are connected to ground, the filters are integrated conveniently. The design example of 4th-order Butterworth filter whose cutoff frequency is 1 MHz and its computer PSPICE simulation results are also given.

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Available abstract

The authors presents a systematic theory and method of designing nth-order CCII (second generation current conveyor) filter with multiple-loop feedback. Various kinds of filter structures can be produced according to this theory and method. The produced filter is constructed by 2n CCIIs, n capacitors and 2n resistors. Because the input signal is only joint to circuit from y terminal of CCII, the filters have very high input impedance. Because all the RC elements are connected to ground, the filters are integrated conveniently. The design example of 4th-order Butterworth filter whose cutoff frequency is 1 MHz and its computer PSPICE simulation results are also given.

Key concepts: Current conveyor, Resistor, Analogue filter, Filter (signal processing), Low-pass filter, Butterworth filter, Capacitor, Electronic engineering

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