A methodology to build a behavioral model for large scale analog circuits is presented in the paper.Any analog circuit can be equivalently described by a network consisting of Sources

Amplifier(amplifier can be considered as a virtual filter with gains)

Switchers and Impedance.This network is defined as analog circuits’ SASI structure in the paper.Due to the equivalency between this abstracted network and Hammerstein model

macro behaviors of analog circuits can be modeled based on Hammerstein method.Then

those macro behavior models can be described by using the standard HDL(Verilog-A

VHDL-AMS

and so on)accordingly.This Top-Down methodology is validated using the in-house designed Infrared Remote Control Receiver as an example.