关键词: 晶体管, Y参数, &pi, 参数

Abstract:

High-frequency small-signal equivalent circuit model of the transistors can be obtained in two ways:one is that the transistor can be seen as a two-port network,thus listing current and voltage equations,and developing a network model which meets the equation,in which Y-parameter model is often used;the other is to make the model according to the physical process occurring within the transistor,namely hybrid π-type parameter model.The same transistor applied to different occasions can be represented by different equivalent circuits.It should be mutually equivalent between the various equivalent circuits of the same transistor;the parameters of all kinds of equivalent circuits should also be interchangeable.

Key words: transistor;Y- parameters;π-parameters