Buffer, buffer operation and method of manufacture

摘要

An integrated circuit includes an output buffer operable to drive an output node. The output buffer may comprise a MOSFET having a JFET integrated within a portion of a drain region of the MOSFET. The JFET may comprise a gate of second conductivity formed in semiconductor material of first conductivity type, which is contiguous with the drain region for the MOSFET. A voltage shaping circuit may control a bias of the JFET gate in accordance with the voltage levels of an output node and a predetermined output impedance.