an138Title: SPICE-Compatible Op Amp Macro-Model Application Note (AN-138) Author: Analog Devices, Inc. Created Date: 2191999 12:21:13 PMMicrel, Inc. AN-138 November 2006 2 M9999-111006-A Port Based Priority Port based priority is the simplest form of QoS. Each ingress port can be individually classified as one of