New OTA-C Current-Mode Second-order and Fourth-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 second-order and fourth-order band-pass filters. The proposed second-order band-pass filtercircuits offer advantageous features like ease of design, good sensitivity and orthogonal tunability of pole-Q. The proposed fourth-order band-pass filtercircuit is attractive as it requires less number of OTAs and capacitors.PSPICE simulation results are given for the proposed circuits.

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