a waveshaper (source drain) controlled by a coefficient (gate)
Maybe the positive part of tanh, and a "gain" to work like the gate?
I am far away?
JFET modelling
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- KVRist
- Topic Starter
- 65 posts since 1 Apr, 2016
I thought about doing it this way:
a waveshaper (source drain) controlled by a coefficient (gate)
Maybe the positive part of tanh, and a "gain" to work like the gate?
I am far away?
a waveshaper (source drain) controlled by a coefficient (gate)
Maybe the positive part of tanh, and a "gain" to work like the gate?
I am far away?
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- KVRist
- 37 posts since 13 Jan, 2016
You're trying to fit those curves right?
If so, then yes.. they seem like they will work. The gate curve seems like it could be fitted with a polynomal. Maybe something like y=x^2 - c where c is some constant.
Let me ask you at this stage what are you exactly trying to model?
Because those to curves refers as how the current reacts in function of Vgs. So, the output of your model will be current and you'll have to consider the connection of the jfet in the circuit.
So;
Are you trying to model a Jfet stage? (signal in - signal out). Because your output will be different whether the stage is a source follower, a common source stage, etc.
Or are you trying to model a Jfet that then i will be "connected" to a circuit?
If so, then yes.. they seem like they will work. The gate curve seems like it could be fitted with a polynomal. Maybe something like y=x^2 - c where c is some constant.
Let me ask you at this stage what are you exactly trying to model?
Because those to curves refers as how the current reacts in function of Vgs. So, the output of your model will be current and you'll have to consider the connection of the jfet in the circuit.
So;
Are you trying to model a Jfet stage? (signal in - signal out). Because your output will be different whether the stage is a source follower, a common source stage, etc.
Or are you trying to model a Jfet that then i will be "connected" to a circuit?
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- KVRAF
- 3080 posts since 17 Apr, 2005 from S.E. TN
From a previous thread, I suspect the purpose might be an 1176 type resistor-FET voltage divider, for audio attenuation. A FET gain cell.
