High frequency transistor equivalent circuits and parasitic elements

[haseng1]

hello every body ;
i have a big problem with transistors at high frequency ;
their equivalent circuit ,parastic elements,transfer functions;
can some body help;
or give me alink to a convinent reference that can help.

 

[NoTime]

What's high frequency to you?
What type of transistor?

Have you tried looking at manufactures data sheets?
Those should give you all the information you need.

 

[unplebeian]

Try Mohammed Gaussi as a reference.