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A single-amplifier biquad active filter

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2 Author(s)

A single-amplifier circuit is introduced and shown to be capable of realizing any second-order minimum-phase voltage transfer function while maintaining an isotopic structure. Sensitivity analysis demonstrates that the single-amplifier biquad (SAB) is comparable to other state-of-the-art active filters employing more amplifiers. A bandpass SAB together with an extra amplifiers enables the realization of right-half-plane zeros.

Published in:

Circuit Theory, IEEE Transactions on  (Volume:19 ,  Issue: 4 )