Single DDCC biquads with high input impedance and minimum number of passive elements


Ibrahim M., Kuntman H., Cicekoglu O.

ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, vol.43, no.1, pp.71-79, 2005 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 43 Issue: 1
  • Publication Date: 2005
  • Doi Number: 10.1007/s10470-005-6572-0
  • Title of Journal : ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING
  • Page Numbers: pp.71-79

Abstract

Two new configurations for the design of biquad filters with high input impedance are presented. The first configuration can synthesize low-pass and high-pass filter functions according to the passive components used. The second one can synthesize a band-pass filter function. The proposed configurations employ only one differential difference current conveyor (DDCC) as active elements and minimum number of passive elements, namely two resistors and two capacitors. Another filter topology based on DDCC is presented that allows modifying the quality factor without changing its natural frequency. All the filters enjoy low sensitivities. SPICE simulation results are given to confirm the validity of the analysis and to point out the high performance of the filters.