A Comparative Study of Low Power MOS Design Approaches and Impact on VDTA Performance

This paper investigates the Voltage Differencing Transconductance Amplifier (VDTA), a universal active element, through the use of new approaches, such as Bulk-Driven MOS (BDMOS), Floating Gate MOS (FGMOS), and Dynamic Threshold MOS (DTMOS) transistors, which perform well at low supply voltages. The Voltage Differencing Transconductance Amplifier (VDTA) is simulated to illustrate these methods. The utilized VDTA’s variant operates at a low supply voltage of ±0.2 V, with a remarkably low power dissipation of approximately 6 nW. This efficiency is primarily due to the inherent low-voltage characteristics of the MOS transistor configurations employed. The functionality and effectiveness of the utilized VDTA designs are verified through comprehensive simulations using LTSPICE, where the VDTA is applied in basic filter circuits to test its performance. The results confirm the viability of these advanced transistor techniques in enhancing the performance of VDTAs in low-power analog circuits, offering valuable contributions to the field of low-voltage, low-power electronic design.