The dual-X current conveyor (DXCCII): a new active device for tunable continuous-time filters


Zeki A., Toker A.

INTERNATIONAL JOURNAL OF ELECTRONICS, vol.89, no.12, pp.913-923, 2002 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 89 Issue: 12
  • Publication Date: 2002
  • Doi Number: 10.1080/0020721031000120461
  • Title of Journal : INTERNATIONAL JOURNAL OF ELECTRONICS
  • Page Numbers: pp.913-923

Abstract

In this work, a new active device, namely the dual-X current conveyor is proposed for linear tunable continuous-time filtering. The proposed device avails tunability with the aid of triode MOSFETs, while keeping large-signal linearity high. Besides linearity enhancement, the dual-X structure of the active device brings interesting features, which help reduce the required number of active devices and MOSFET resistors in a MOSFET-C continuous-time filter. Also, unlike most MOSFET-C filter structures, there does not exist a matching requirement for the utilized MOSFETs. A CMOS implementation and two application examples (a current-mode Tow-Thomas biquad and a current-mode sinusoidal oscillator) are supplied and simulated to reveal the important advantages.