Patent ID: 7683674

Claim:
A T-switch for connecting first, second and third lines and comprising: an input section in turn including first, second, and third input pass transistors, each connecting a respective line with a first internal node; an output section in turn including first, second and third output pass transistors, each connecting a respective line with a second internal node; and a single buffer stage connected to a first and a second voltage reference and inserted between said first and second internal nodes, said buffer stage including a first pull up transistor inserted between said first voltage reference and said first internal node and having a gate terminal connected to a third internal node of said buffer stage, a first internal transistor inserted between said first voltage reference and said third internal node and having a gate terminal connected to said first internal node, a second internal transistor inserted between a fourth internal node of said buffer stage and said second voltage reference, and a high threshold stage inserted between said third internal node and a fourth internal node of said buffer stage.