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Low-frequency compensation of FDNR low-pass filters

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1 Author(s)

A solution to the problem of realizing an inductorless low-pass elliptic transfer function has been proposed in which grounded FDNR elements are realized. The practical bias requirements for a resistive branch to ground have resulted in nonideal low-frequency rolloff in the passband. A simple technique is proposed to prevent low-frequency rolloff, to ensure direct-coupled operation, and at the same time to satisfy the practical constraints imposed by the bias requirements of the operational amplifiers.

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Proceedings of the IEEE  (Volume:60 ,  Issue: 4 )