Patent ID: 11876514
Assignee: NXP USA, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A bidirectional optocoupler circuit configured to convey signals between a first terminal and a second terminal, wherein the first terminal is configured with a first voltage level and a first ground level in a first power domain, and the second terminal is configured with a second voltage level and a second ground level in a second power domain, wherein the bidirectional optocoupler circuit comprises:
a first level shifter connected to the first terminal, and configured to shift the first voltage level of an input signal at the first terminal to an intermediate voltage level with respect to the first ground level as a first shifted signal;
an optocoupler having an input terminal connected to the first level shifter, and operable with the intermediate voltage level to transfer the first shifted input signal at the input terminal to an optocoupler signal at an output terminal; and
a second level shifter connected to the output terminal of the optocoupler, and configured to shift the optocoupler signal into the second voltage level with respect to the second ground level as an output signal at the second terminal.