A novel log-domain first-order multifunction filter

Kircay A., Cam U.

ETRI JOURNAL, cilt.28, sa.3, ss.401-404, 2006 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 28 Sayı: 3
  • Basım Tarihi: 2006
  • Doi Numarası: 10.4218/etrij.06.0205.0117
  • Dergi Adı: ETRI JOURNAL
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.401-404
  • Anahtar Kelimeler: log-domain filters, state-space synthesis, multifunction filter, TRANSLINEAR CIRCUITS
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

A new log-domain first-order multifunction filter is proposed in this letter The proposed filter is systematically derived using the state-space synthesis procedure from a corresponding block diagram. It provides low-pass (LP), high-pass (HP), and all-pass (AP) responses simultaneously for a single input signal. The filter circuit has a very simple structure since it uses only bipolar junction transistors (BJTs) and a grounded capacitor It can be electronically tuned by changing an external current. The filter has a greater bandwidth due to its inherent current-mode and log-domain operations. PSPICE simulations are given to confirm the theoretical analysis.