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.

Keywords

• The second generation current conveyor, CCII, Current-mode, Multifunction filter.

Kazanç Değişimli Alçak Geçiren ve Bant Geçiren Cevapları Gerçekleştirmek için Tasarlanan Çok Fonksiyonlu Bir Filtre

Öz

Aktif devre elemanlarından ikinci kuşak akım taşıyıcılar (CCII), akım-modlu filtrelerin tasarımında yaygın olarak kullanılmaktadır. Bu çalışmada, yalnızca artı tipli ikinci kuşak akım taşıyıcıları ve topraklanmış kapasitörler kullanılarak, değişken kazançlı alçak geçiren ve bant geçiren cevaplar sağlayan tek girişli çok çıkışlı filtre devresi önerilmiştir. Önerilen devre, pasif eleman eşleştirme şartından bağımsızdır. Bu nedenle, Entegre Devre Teknolojisi (IC) için uygundur. Ayrıca, geliştirilmiş filtre düzeneği; AD844 gibi mevcut ticari aktif devreler ile kolayca gerçekleştirilebilir. Devre performansı SPICE simülasyonu ve deneysel test sonuçları ile gösterilmiştir.

Anahtar Kelimeler

• The second generation current conveyor, CCII, Current-mode, Multifunction filter.

Kaynakça

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