Design of active-only highpass and bandpass leapfrog filters using multi-current-output differentiators

Tangsrirat, Worapong; Dumawipata, Teerasilapa; Unhavanich, Sumalee; Surakampontom, Wanlop

doi:10.1109/ICECS.2003.1302034

Design of active-only highpass and bandpass leapfrog filters using multi-current-output differentiators

Author(s)

Tangsrirat, Worapong

Dumawipata, Teerasilapa

Unhavanich, Sumalee

Surakampontom, Wanlop

Date Issued

December 1, 2003

Type

Conference Paper

DOI

10.1109/ICECS.2003.1302034

Abstract

This paper presents an alternative approach for realizing active- only current-mode leapfrog ladder filters using multi-current- output differentiator. A novel multi-output differentiator, which is only composed of internally compensated type operational amplifier (OA) and operational transconductance amplifiers (OTAs), is first proposed. The proposed design procedures of the active-only current-mode highpass and bandpass leapfrog ladder filters employing only OTAs and multi-output differentiators without external passive elements are then presented. A property of this approach is the possibility of tuning the current transfer function by the external controlled transconductances. PSPICE simulation results verifying theoretical predictions are included. © 2003 IEEE.

Citation

Proceedings of the IEEE International Conference on Electronics Circuits and Systems, 1, 292-295, 2003