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 gm and gain of output currents BX. 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