제어로봇시스템학회:학술대회논문집

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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OTA-C Realization of Electronically Tunable Current-Mode Biquadratic filters

  • Tangsrirat, Worapong (Faculty of Engineering and Research Center for Communication and Information Technology(ReCCIT), King Mongkut's Institute of Technology Ladkrabang) ;
  • Unhavanich, Sumalee (Department of Industrial Electrical Technology (IET), Faculty of Engineering, King Mongkut's Institute of Technology North-Bangkok) ;
  • Dumawipata, Teerasilapa (Department of Industrial Electrical Technology (IET), Faculty of Engineering, King Mongkut's Institute of Technology North-Bangkok) ;
  • Surakampontorn, Wanlop (Faculty of Engineering and Research Center for Communication and Information Technology(ReCCIT), King Mongkut's Institute of Technology Ladkrabang)
  • Published : 2000.10.01
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Abstract

An active-C biquadratic filter structure is proposed which consists of only seven OTAs and two grounded capacitors. The proposed circuit can simultaneously realize lowpass, bandpass and highpass transfer functions without changing circuit topology. This technique provides many advantages which include low passive and active sensitivities and, moreover, its Q-factor is electronically tunable and separately from the tuning of the natural angular frequency ${\omega}_o$. PSPICE simulation results are obtained that confirm the theoretical analysis.

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