Building a JFET Transistor Cascade for Gain, Linearity & Stability

AI Thread Summary
The discussion centers on cascading two or three JFET transistors to achieve optimal gain, linearity, and stability in an amplifier design. Key considerations include the specifications of the overall amplifier, available voltage power supplies, and the impedance characteristics of both the signal source and load. The importance of negative feedback for enhancing stability and linearity is highlighted, suggesting it may be a necessary component of the design. Participants are encouraged to provide examples of multi-stage JFET amplifiers that align with the user's goals. Overall, the thread seeks detailed guidance on calculations and configurations for effective JFET cascading.
Isanko
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I need help on how to cascade two or three Jfet transistor and the calculation of the values to have a good amount of gain. The cascade also should help in providing good linearity, have less distortion and should stable good stability.Thanks, good help will really be appreciated by me.
 
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i mean should have good stability
 
Isanko said:
I need help on how to cascade two or three Jfet transistor and the calculation of the values to have a good amount of gain. The cascade also should help in providing good linearity, have less distortion and should stable good stability.Thanks, good help will really be appreciated by me.

Isanko said:
i mean should have good stability

Welcome to the PF.

What kind of cascading did you have in mind? What are the specs for your overall amplifier? What voltage power supplies do you have available? What is the impedance and characteristics of your signal source, and what is the impedance and character of the load that will be driven by this amplifier.

Some of the terms you are using (stability, linearity, etc.) imply using negative feedback. Is that part of what you are wanting to do?

Can you post some examples of multi-staje JFET amps that are similar to what you are wanting to do?
 
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