Active all-pass filter using a differential-input operational amplifier

Dutta Roy, S. C. (1969) Active all-pass filter using a differential-input operational amplifier Proceedings of the IEEE, 57 (9). pp. 1687-1688. ISSN 0018-9219

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Official URL: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumb...

Related URL: http://dx.doi.org/10.1109/PROC.1969.7376

Abstract

Horowitz's active RC synthesis procedure with a voltage controlled current source is combined with Sheingold's realization of the active element using a differential-input operational amplifier to derive a circuit for an all-pass filter of any arbitrary order, having poles confined to the negative real axis only. Illustrative examples are worked out for the first- and second-order cases.

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