Cascadable current-mode high-order high-pass filters using OTAs

A new scheme for realising cascadable current-mode high-order high-pass filters is presented. The proposed scheme employs novel first-order high-pass cascadable sections employing a single as well as a dual-output operational transconductance amplifier (DO-OTA) and a grounded capacitor. The high order filters of any sensible order can be realised by cascading identical first order sections. The proposed high order filters are suitable for high frequency applications with linear electronic control of pole frequency omega(o). The sensitivity figures are reasonably low. The simulation results are included.