Patent ID: 6091264
Filing Date: 2000-07-18
Classification: H03K

Abstract:
A Schmitt trigger input stage using metal oxide semiconductor devices, comprising:a supply voltage;a reference potential;an input section having an input and an output terminal B, for receiving transistor-transistor logic (TTL) signal levels, having a most negative up level and a most positive down level, said most positive down level having a value of 0.8 V;a level shifter connected to said input section via a terminal A1, said level shifter shifting voltage levels of said input section, where said level shifter comprises an n-channel transistor having a drain-source path and a gate, said drain-source of said n-channel transistor connected between said terminal A1 and said reference potential, said gate of said n-channel transistor connected to said terminal A1; andan output section connected to said output terminal B, said output section providing metal oxide semiconductor (MOS) signal levels.