A novel log-domain first-order multifunction filter
ETRI JOURNAL, cilt.28, sa.3, ss.401-404, 2006 (SCI-Expanded, Scopus)
- 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
- 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.