A ELECTRONICALLY TUNABLE HIGH-ORDER HIGHPASS FILTERS WITH MINIMUM OF COMPONENTS

Ivan Michal Olšák - Kamil Vrba - Lukáš Matějíček

   A new method for realization of an electronically tunable high-order admittance function that can be used for the synthesis of non-cascade active frequency filters is introduced. Operational transconductance amplifiers (OTA) are employed as active elements. Electronically controlled high-order highpass filters are presented. As an example, two types of fourth-order Butterworth highpass filters are designed, simulated (using PSPICE) and measured.

Keywords: admittance function, highpass filter, operational transconductance amplifier (OTA)

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