Differential type class-AB log-domain third-order universal filter

KIRÇAY A., ÇAM U.

IEEE 15th Signal Processing and Communications Applications Conference, Eskişehir, Türkiye, 11 - 13 Haziran 2007, ss.455-458 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası:
  • Doi Numarası: 10.1109/siu.2007.4298580
  • Basıldığı Şehir: Eskişehir
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.455-458
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

A new current-mode third-order differential type class-AB log-domain universal filter is proposed, in this study. The design is based on the state-space synthesis method. The proposed filter can realize lowpass (LP), highpass (HP), bandpass (BP), lowpass notch (LPN), highpass notch (HPN), and allpass (AP) responses by changing external currents without any changes in the circuit topology. Butterworth, Chebyshev, and Bessel filter responses of the third-order universal filter are obtained without changing circuit configuration. Also, several different Chebyshev responses can be obtained by changing external currents. The parameters of proposed filter are tunable. Only NPN transistors and grounded capacitors are required to realize filter circuit. PRICE simulations are given to confirm the theoretical analysis.