Low Voltage Low Power DTMOS-CDTA Filter Design Using for Biomedical Signal Processing Applications

Abstract

In this work, a band pass filter circuit consisting of Current Differencing Transconductance Amplifier (CDTA) structure, working in the biomedical signal frequency range, is proposed and simulation results are obtained via LTSPICE program. PMOS transistors in the proposed CDTA filter circuit are made with Dynamic Threshold Voltage MOS (DTMOS) structures instead of traditional MOSFETs. LTSPICE simulations of the proposed circuits give results that agree well with the ideal results. The proposed CDTA filter circuit thanks to the usage of DTMOS transistors operates at a supply voltages of ± 0.4V and power dissipation is approximately 90nW.