Electrostatic discharge protection for level-shifter circuit

摘要

A circuit, a multiple power domain circuit, and a method are disclosed. An embodiment is a circuit including an input circuit having a first output and a second output, the input circuit being coupled to a first power supply voltage, and a level-shifting circuit having a first input coupled to the first output of the input circuit and a second input coupled to the second output of the input circuit, the level-shifting circuit being coupled to a second power supply voltage. The circuit further includes a first transistor coupled between a first node of the level-shifting circuit and the second power supply voltage, and a control circuit having an output coupled to a gate of the first transistor, the control circuit being coupled to the second power supply voltage.

主权项

1. A circuit comprising:
an input circuit having a first output and a second output, the input circuit being coupled to a first power supply voltage; a level-shifting circuit having a first input coupled to the first output of the input circuit and a second input coupled to the second output of the input circuit, the level-shifting circuit being coupled to a second power supply voltage; a first transistor coupled between a first node of the level-shifting circuit and the second power supply voltage; and a control circuit having an output coupled to a gate of the first transistor, the control circuit being coupled to the second power supply voltage, the control circuit being configured to turn off the first transistor in response to an electrostatic discharge (ESD) event.