Behavior macromodels using circuit templates

There has been increasing trend towards serial bus signaling. This migration has been facilitated by increasing encapsulation of signal integrity functions on chip. Such integration, however, has driven up the complexity of traditional I/O driver models extracted from direct layout. Consequently these models perform slower than ever. This performance degradation makes them unsuitable for what if design prototyping. To overcome this shortcoming a new, novel and practical method of generating fast behavior macromodels is proposed. These models are based on known circuit templates. They include adjustable parameters. Particular implementations are realized by tuning the parameters to match the behavior of the template to a reference layout model. Examples of these template based behavior models are shown. The close correlation they achieve to reference models and real world measurements are demonstrated. Additional work is called for. More model templates and standard methods of specifying them are needed. Further work also needs to be done in formal methods of correlating model parameters.