Patent ID: 7057450

Claim:
A noise filter for an integrated circuit comprising: a transition circuit having an input and an output, said input of said transition circuit being coupled with an input pad of said integrated circuit, said output of said transition circuit being coupled with an input buffer; a first capacitor being inserted between said output of said transition circuit and a first voltage source; and a second capacitor being inserted between said output of said transition circuit and a second voltage source; said transition circuit comprising with a Pch MOS transistor and a Nch MOS transistor; the source of said Pch MOS transistor and the Nch MOS transistor being coupled with the input of said transition circuit; the drain of said Pch MOS transistor and the Nch MOS transistor being coupled with the output of said transition circuit; the gate of said Pch MOS transistor being coupled with a third voltage source; the gate of said Nch MOS transistor being coupled with a fourth voltage source.