Fully differential difference transconductance amplifier using FG-MOS transistors

This paper presents a fully differential difference transconductance amplifier for applications to low-voltage and low-power analogue circuits. Differential difference input voltage can be obtained using floating-gate MOS transistor technique and it can be taken also the possibility of low supply voltage of the circuit. The proposed active building block has been simulated using TSMC 0.18 μm n-well CMOS technology. The circuit uses ±0.4 V supply voltage and consumes a 27 μW of static power. A fully differential universal filter using proposed circuit as active device was presented as an example application.