Patent ID: 11923852
Assignee: ADVANCED MICRO DEVICES, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A voltage level-shifting circuit for an integrated circuit (IC) comprising:
an input terminal receiving a voltage signal referenced to an input/output (I/O) voltage level supplied by an I/O voltage supply;
a transistor overvoltage protection circuit supplied with a second voltage supply with a voltage level lower than the I/O voltage level and comprising:
a first p-type metal oxide semiconductor (PMOS) transistor with a source coupled to the second voltage supply, a gate receiving an enable signal, and a drain connected to a central node;
a first n-type metal oxide semiconductor (NMOS) transistor with a drain connected to the central node, a gate connected to the input terminal, and a source connected to an output terminal of the transistor overvoltage protection circuit; and
a second NMOS transistor with a drain connected to the input terminal, a gate connected to the central node, and a source connected to said output terminal of the transistor overvoltage protection circuit; and

an inverter supplied with the second voltage supply and having an input terminal connected to said output terminal of the transistor overvoltage protection circuit.