Design of current-mode MOSFET-C filters using OTRAs

  • Authors:

  • Yuh-Shyan Hwang;Dong-Shiuh Wu;Jiann-Jong Chen;Chun-Chi Shih;Wen-Shou Chou

  • Affiliations:

  • Department of Electronic Engineering, National Taipei University of Technology, Taipei 106, Taiwan, Republic of China;Department of Electronic Engineering, Lunghwa University of Science and Technology, Taoyuan 333, Taiwan, Republic of China;Department of Electronic Engineering, National Taipei University of Technology, Taipei 106, Taiwan, Republic of China;Department of Electronic Engineering, National Taipei University of Technology, Taipei 106, Taiwan, Republic of China;Department of Information Communication, Yuan-Ze University, Taoyuan 320, Taiwan, Republic of China

  • Venue:
  • International Journal of Circuit Theory and Applications
  • Year:
  • 2009

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Abstract

In this paper, third-order current-mode MOSFET-C filters that use operational transresistance amplifiers (OTRAs) with little parasitic capacitance effects are presented. On the basis of the proposed systematic method and design procedure, we can efficiently synthesize third-order active filters with OTRAs along with simplified MOSFET resistor circuits, and all virtually grounded capacitors. Third-order current-mode Chebychev low-pass and high-pass filters are realized to verify the validity of the theoretical analysis. Experimental results employing commercially available current feedback amplifiers are also given. Copyright © 2008 John Wiley & Sons, Ltd.