This paper presents a technique for improving the response of amplifier implemented with multiple inputs floating gate transistor for processing input signals of very small amplitude. With the technique presented here, it is possible to improve the transconductance of the amplifier, maintaining all the positive features of the device as variable threshold voltage and very-low voltages applications. This document shows the proposed technique and its implementation in SPICE using CMOS technological parameters for 0.35 µm process. Additionally, the results obtained using a common source amplifier to validate the feasibility of the proposed technique are included.