  The paper presents a new approach to automate the set-up of the design
equations of the manual analog design process. Its main contribution is a
comprehensive hierarchical performance equation library (HPEL) for op-amps. The
HPEL makes the set-up of design equations independent of the topology. Based on
the library and the functional block recognition method in [1], analytical
performance models for various op-amp topologies are automatically
instantiated. The method is currently designed for basic op-amps. In this
paper, we use the method to size different op-amp topologies. Experimental
results featuring four circuits are presented. The HPEL has also been
integrated into a structural synthesis method featuring several thousand op-amp
topologies [2].
