TISO ADJUSTABLE FILTER WITH CONTROLLABLE CONTROLLED-GAIN VOLTAGE DIFFERENCING CURRENT CONVEYOR

Jan Jerabek – Roman Sotner – Kamil Vrba

   The main aim of this paper is to present solution of triple-input single-output (TISO) filter with independently adjustable pole frequency, quality factor, bandwidth and also gain. Filter is universal, operates in current mode and includes only one active element -- the so-called Controlled-Gain Voltage Differencing Current Conveyor (CG-VDCC) with two controllable parameters: transconductance g_m and gain of output currents B_X. Implementation of CG-VDCC element in 0.18 μm CMOS technology is also included and this model is used in proposed filter simulations.

Keywords: current mode, SITO filter, universal filter, CG-VDCC

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