Compact modeling of vertical ESD protection NPN transistors for RF circuits

We present an easy-to-use, simulator-independent compact model of a vertical npn transistor suitable for ESD circuit simulation. In addition to including high-current and breakdown effects, we also model accurately the small-signal off-state impedance of the device using s-parameter measurements, for inclusion in RF circuit simulations. Experimental results are provided for silicon and SiGe npn transistors.