A generic VHDL-AMS behavioral model physically accounting for typical analog non-linear output behavior

This paper presents a VHDL-AMS behavioral model for a typical non-linear behavior commonly observed at the output of amplifier analog circuits. Based on a circuit-inspired modeling approach, the model offers a parameter-controlled nonlinear output while preserving its electrical properties including DC operating point and dynamic output impedance. Connected in a common push-pull topology, hypothetical MOS-like devices were assumed where their behavior was abstracted to directly relate with the model parameters and consequently with the non-linear conduct of the output. The model operation is carefully studied and tested to demonstrate its potential usage as a flexible interfacial candidate for accurate design and verification purposes.