| 摘要 |
A system and method for efficient input/output (I/O) port overvoltage protection of a high-speed port. An interfacing system for connecting peripheral devices to a computing system comprises ports for conveying serial communications bidirectional signals and an overvoltage protection circuit. The protection circuit prevents an overvoltage condition on one port in response to an overvoltage event on a corresponding second port. In one embodiment, the interfacing system connects USB peripheral devices to an automotive infotainment system comprising an automotive battery potiential greater than a USB power supply. In addition, the overvoltage protection circuit is able to transmit signals between the two ports without signal attenuation defined by an industry standard specification such as Universal Serial Bus (USB) Implementers Forum (IF) eye pattern diagram test. The overvoltage protection circuit is configured to have a small footprint, and, therefore, does not utilize a power reference and comparator circuit. |
