Neural Networks for Transient Modeling of Circuits : Invited Paper
2021
Theoretical analyses as well as case studies have established that behavioral models based on a recurrent neural network (RNN) are suitable for transient modeling of nonlinear circuits. After training, an RNN model can be implemented in Verilog-A and evaluated by a SPICE-type circuit simulator. This paper describes hurdles that have prevented wide-scale adoption of the RNN as an IP-obscuring behavioral model for circuits and presents recent advances. A new stability constraint is formulated and demonstrated to guide model training and improve performance. Augmented RNNs that can accurately capture aging effects and represent process variations are presented.
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