Resistorless tuneable KHN-filter in current mode with CCCIIs and grounded capacitors

Abstract

In this work, an electronically tuneable resistorless Kerwin-Huelsman-Newcomb (KHN) filter circuit is proposed, employing multi-output CCCIIs (MO-CCCIIs) and grounded capacitors. The new circuit provides highpass, bandpass and lowpass responses simultaneously without any matching condition. Pole frequency and quality factor of the new circuit can be tuned electronically and orthogonally via biasing currents of MO-CCCIIs. SPICE simulation results verifying the theory are also included.