Optimum-sensitivity active RC bandpass filter

Optimum-sensitivity active RC bandpass filter

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A realisation is given for a 2-pole bandpass filter that requires only resistors and capacitors as passive elements and a negative-immittance convertor as an active element. The realisation uses fewer components than other realisations, is optimally insensitive to variations in the gain of the negative-immittance convertor and provides for independent adjustment of both the resonant frequency and the Qfactor of the circuit.


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