Novel multiple function analog filter structures and a dual-mode multifunction filter

Erdogan E. S., Topaloglu R. O., Cicekoglu O., Kuntman H., Morgul A.

INTERNATIONAL JOURNAL OF ELECTRONICS, vol.93, no.9, pp.637-650, 2006 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 93 Issue: 9
  • Publication Date: 2006
  • Doi Number: 10.1080/00207210600711713
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.637-650
  • Istanbul Technical University Affiliated: No


This paper reports three multi-function filters each of which realizes at least three basic functions without any external passive elements. Depending on the circuit, from one to four operational transconductance amplifiers (OTAs), and two operational amplifiers (OPAMPs) are employed. All three circuits are transimpedance-mode circuits; one of them can also operate as a current-mode filter. Therefore this filter represents a dual-mode, multifunction filter. The presented theory is verified with macro models in simulation program with integrated circuit emphasis (SPICE) simulations and post layout simulations, which are carried out with parasitics extracted from the layouts of the filter chips.