ABSTRACT
Analogue behavioural modelling (ABM) allows the designer to model analogue circuit functions using mathematical equations, tables, and transfer functions. The designer can then simulate systems as a combination of “block diagrams”, each of which performs a specific function. This chapter shows how behavioural models of analogue circuits are developed. It also shows how ABM can be used to model practical components. The chapter considers the modelling of the gain-frequency characteristics of op-amps. PSpice performs ABM by extending the capabilities of the two controlled sources, voltage-controlled voltage source and voltage-controlled current source. These sources are identified by PSpice as components, starting with the letters E and G, respectively. Therefore, when modelling circuits using ABM, the E component is used when an output voltage is required, while the G component will be used when an output current is needed.
