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I need to design a multistage amplifier using 2 BJT's (1 NPN, 1 PNP) and one P-channel JFET.
It needs to have relatively high gain and bandwidth characteristics.
I was thinking of using a cascode amplifier design, however am not sure how to include a 3rd transistor...?
Or would i be better off using two Common Emitter stages and a third stage with good BW characteristics... does a Common Drain?
The JFET would be good as the first stage because if its high imput resistance (i was thinking maybe a Common Drain... does it have good bandwitdh characteristics though?)
Another thing i guess i might need to worry about is not losing too much current through the stages.
Any help woudl be much appreciated!
Cheers.
It needs to have relatively high gain and bandwidth characteristics.
I was thinking of using a cascode amplifier design, however am not sure how to include a 3rd transistor...?
Or would i be better off using two Common Emitter stages and a third stage with good BW characteristics... does a Common Drain?
The JFET would be good as the first stage because if its high imput resistance (i was thinking maybe a Common Drain... does it have good bandwitdh characteristics though?)
Another thing i guess i might need to worry about is not losing too much current through the stages.
Any help woudl be much appreciated!
Cheers.
