Patent ID: 11955796
Assignee: APPLE INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An apparatus, comprising:
a power supply port of an integrated circuit, wherein the power supply port is coupled to an internal power supply node via a first resistor;
a driver circuit configured to generate, using a data signal and a voltage level of a regulated power supply node, an output signal on a signal port of the integrated circuit;
a first protection circuit configured to couple the signal port to the internal power supply node in response to a detection of an electrostatic discharge event on the signal port; and
a second protection circuit coupled to the internal power supply node, wherein the second protection circuit is configured, in response to the detection of the electrostatic discharge event, to increase a voltage level of an input to the driver circuit, wherein the second protection circuit includes a first diode coupled between a ground supply node and the input to the driver circuit, a second diode coupled between the internal power supply node and the input to the driver circuit, and a second resistor coupled between the regulated power supply node and the input to the driver circuit.