New Schmitt Trigger with Controllable Hysteresis using Dual Control Gate-Floating Gate Transistor (DCG-FGT)

Abstract

This paper presents different low voltage adjustable CMOS Schmitt trigger using DCG-FGT transistor. Simple circuits are introduced to provide flexibility to program the hysteresic threshold in this paper. The hysteresis can be controlled accurately at a large voltage range. The proposed Schmitt trigger have been designed using 90nm 1.2V CMOS technology and simulated using Eldo with PSP device models. The simulation results show rail-to-rail operation and adjustable switching voltages <em>V<sub>TH- </sub></em>(low switching voltage) and <em>V<sub>TH+ </sub></em>(high switching voltage).