A multifunction filter for realizing gain variable low-pass and band-pass responses

Abstract

The second generation current conveyors (CCIIs) as active circuit devices are widely used for designing current-mode (CM) filters. In this paper, a single input multi output filter employing only plus-type CCIIs (CCII+s) and grounded capacitors, and for providing variable gain low-pass and band-pass responses, is suggested. The proposed filter is free from critical passive component matching conditions. Therefore, it is suitable for integrated circuit (IC) technology. Further, developed filter configuration can be easily realized with commercially available active devices such as AD844s. The circuit performance is demonstrated by means of SPICE simulation and experimental test results.