In computer-aided design, behavioral modeling is a high-level circuit modeling technique where behavior of logic is modeled. The Verilog-AMS and VHDL-AMS languages are widely used to model logic behavior.
Other modeling approaches Register transfer level modeling: logic is modeled at register level Structural modeling: logic is modeled at both register level and gate level
References Analog Behavioral Modeling with the Verilog-A Language by Dan FitzPatrick, Ira Miller.