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fT of transistors [hlp]

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Hello Everyone;
What is the fT of a transistor?
 

FT of the transitor is the frequency at which the current gain of the transistor is unity

khouly
 

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Hello;
If fT is specified for a transistor, what is the maximum frequency at which that is working?
 

the max freq u can use this transistor as a AMP , it can be FT/5 , or FT/10

but as oscillator , much higher the limit is Fmax , which is the unity power gain frequency
 

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How to get with Hspice ?
I tried LX7()/LX20(), but LX20() is 0.0 :cry:

How to simulate it with HSPICE ?
 

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