Patent attributes
The present disclosure relates to an electrostatic discharge (ESD) protection circuit including a dynamic field plate bias circuit, and associated methods. In some embodiments, the ESD protection circuit includes a bipolar junction transistor (BJT) based ESD protection circuit including a field plate configured to increase a breakdown voltage of the BJT based ESD protection circuit. The ESD protection circuit also includes a dynamic field plate bias circuit coupled to the field plate of the BJT based ESD protection circuit. The dynamic field plate bias circuit is configured to provide the field plate a field plate bias at transient opposite to a field plate bias at a normal operation. The transient bias reduces a trigger voltage of the BJT based ESD protection circuit and increases a shunt current of the BJT based ESD protection circuit during the ESD event. Thereby, ESD protection reliability is improved.
