Design of differential type class-AB log-domain second-order notch filter


IEEE 15th Signal Processing and Communications Applications Conference, Eskişehir, Turkey, 11 - 13 June 2007, pp.451-454 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume:
  • Doi Number: 10.1109/siu.2007.4298579
  • City: Eskişehir
  • Country: Turkey
  • Page Numbers: pp.451-454
  • Dokuz Eylül University Affiliated: Yes


In this study, a new current-mode second-order differential type class-AB log-domain notch filter is proposed It is systematically designed using state-space synthesis method. Only transistors and grounded capacitors are required to realize the filter circuit. Three cases of the second-order notch filter were obtained; the regular notch, the lowpass notch, and the highpass notch. The center frequency, the notch frequency, the quality factor, and gain of the filter can be electronically tuned by changing external currents. PSPICE simulations are given to confirm the theoretical analysis.