ADAPTIVE ELECTROSTATIC DISCHARGE(ESD) PROTECTION OF DEVICE INTERFACE FOR LOCAL INTERCONNECT NETWORK(LIN) BUS AND THE LIKE

摘要

The adaptive electrostatic discharge (ESD) protection of the device interface has very good ESD robustness when handled or when installed in or removed from the system, and has robust immunity to DPI, EMI, etc. when operating in the system. There is an important capacitive coupling between the drain and gate of the ESD protection MOS device to improve ESD protection and reduce the snapback voltage when there is no DPI on the external connections to be protected (or at low levels). Thus, when a significant DPI / EMI signal is detected at the external connection, the capacitive coupling between the drain and gate of the MOS ESD protection device is isolated, bypassed or attenuated to improve the device's DPI / EMI immunity.