State-space synthesis of current-mode first-order log-domain filters

KIRÇAY A., ÇAM U.

Turkish Journal of Electrical Engineering and Computer Sciences, cilt.14, sa.3, ss.399-416, 2006 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 14 Sayı: 3
  • Basım Tarihi: 2006
  • Dergi Adı: Turkish Journal of Electrical Engineering and Computer Sciences
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.399-416
  • Anahtar Kelimeler: Current-mode circuits, Log-domain filters, State-space synthesis
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

This paper proposes current-mode first-order log-domain filters, which are systematically derived using the state-space synthesis procedure. First-order low-pass, high-pass, and all-pass responses are obtained with different circuit types. The filter circuits have very simple structures, since they use only bipolar junction transistors (BJTs) and a grounded capacitor. They can be electronically tuned by changing an external current. The filters have a greater bandwidth due to inherently current-mode and log-domain operation. PSPICE simulations are given to confirm the theoretical analysis. © TÜBİTAK.