Novel OTA-C Current-Mode Third-Order Band-Pass Filters

Abstract: In this paper, a general two-admittance current-mode circuit structure using Dual-Output OTA (DO-OTA) is explored to derive new third-order unsymmetrical band-pass filters. The proposed circuits are attractive as they require less number of OTAs and use only grounded capacitors. The other advantageous features offered by proposed filters are ease of design, good sensitivity and orthogonal tunability of pole-Q. PSPICE simulation results are also given for the proposed circuits.

Keywords: Third-order filters, OTA-C filters, Continuous-time (CT) filters, SO-OTA, DO-OTA, Current-mode circuits