Saturated velocity model
The variation of velocity with electric field are shown in Fig 13.7 and 13.8
 i ndependent of 
|
In practice a combination of  and  is used.
Better explaination of experimental results of  characterstics.
High Frequency Performance:
Smalll signal input current
and output current
So cut-off frequency  |
In the saturated velocity model as shown in Fig 13.8
Transconductance is 
And cut-off frequency is 
|
