Overvoltage protection circuit with digital control

摘要

A device for digitally protecting against an overvoltage event may include a front-end circuit, an overvoltage protection circuit, and a protection switch. The protection switch may be coupled to the overvoltage protection circuit and may be configured to decouple the front-end circuit from an external medium, in response to a clamp signal. The overvoltage protection circuit may be configured to detect the overvoltage event at one or more nodes of a circuit. In response to the detection of the overvoltage event, the overvoltage protection circuit may generate the clamp signal to activate the protection switch.

主权项

1. A device comprising:
a front-end circuit of a wireless communication circuit capable of being coupled to a radio-frequency (RF) receiving external medium; an overvoltage protection circuit; and a protection switch coupled to the overvoltage protection circuit and operable to decouple the front-end circuit from the RF receiving external medium so as to prevent an overvoltage from reaching the front-end circuit from the RF receiving external medium, in response to a switch signal, wherein the overvoltage protection circuit is configured to detect an overvoltage event at one or more nodes of a circuit, and in response to the detection of an overvoltage event, generate the switch signal to activate the protection switch.