Design of Current-Mode Class 1 Frequency-Agile Filter Employing CDTAs

Atasoyu M., Kuntman H., METİN B., Herencsar N., Cicekoglu O.

European Conference on Circuit Theory and Design (ECCTD), Trondheim, Norway, 24 - 26 August 2015, pp.436-439 identifier

  • Publication Type: Conference Paper / Full Text
  • City: Trondheim
  • Country: Norway
  • Page Numbers: pp.436-439
  • Istanbul Technical University Affiliated: Yes


In this study, in order to demonstrate the versatility of the active building block so-called current differencing transconductance amplifier (CDTA), a current-mode (CM) frequency-agile filter (FAF) application circuit is designed. The derived 2nd-order class 1 CM FAF employs three CDTAs, two capacitors and a single resistor. A layout is designed for CDTA and post-layout simulations are performed using CADENCE Spectre tool with TSMC 0.18 mu m level-49 CMOS technology process and BSIM3v3 parameters. The simulation results confirm theoretical findings.