Three-input single-output current-mode universal filter using a MCDTA

This paper presents a new three inputs and one output current-mode universal filter employing one modified current differencing transconductance amplifier (MCDTA) and two grounded capacitors. The filter can realize low-pass, bandpass, high-pass, band-stop and all-pass responses by appropriately connecting the input terminals. For realize filtering functions, without component-matching conditions and inverting-type input signal requirements. The natural frequency can be electronically controlled by the bias currents of MCDTA. The active and passive sensitivity of the filter are low. The PSPICE simulation results are performed to confirm the presented theory. © 2013 IEEE.