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Journal

Single transistor RC-only second-order allpass filters

By
Maundy B.J.
Elwakil A.S.
Belostotski L.
Herencsar N.

In this letter, all possible single transistor RC-only second-order allpass filters obtainable from a four impedance common-source topology are reported. It is shown that there are only seven such filters with only one of them being a minimum component canonical 2R-2C filter. Two of the found filters are designed and simulated in a 65-nm CMOS process. © 2019 John Wiley & Sons, Ltd.