CMOS CDBA-Based Low-Voltage Low-Power Universal Filter

Abstract

AbstractA new resistor-less current differencing buffered amplifier (CDBA)-based voltage-mode (VM) Multifunction filter is proposed with single CDBA, three NMOS transistors and two capacitors. The presented filter circuit implements all standard filter responses without altering the circuit properties. The study of non-idealities and parasitic effects of the CDBA and their effect on transfer function is also carried out. This circuit also proves to give adequate response even in the presence of non-idealities and process parameter variations. The presented circuit is having low (≤0.5) sensitivity. The proposed circuit feasibility has been justified by using PSPICE 0.18 µm CMOS technology with supply voltage ±0.6 V and power dissipation of 171 µW.KeywordsCDBAUniversal filterVoltage-Mode (VM)