Hello. I want to build a gyrator inductor to replace a 30h 100mA.
I would like better performance if possible, so I used LTspice sim (new to this).
And I found that different mosfet give different attenuation at 120Hz
So what should I look for when choosing a mosfet for a gyrator. I have not found anything on the internet.
Thank you.
I would like better performance if possible, so I used LTspice sim (new to this).
And I found that different mosfet give different attenuation at 120Hz
So what should I look for when choosing a mosfet for a gyrator. I have not found anything on the internet.
Thank you.
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Once you have sorted out basic, down to earth parameters like Id max, Vto, Pd max, etc, the most important parameter for static performance is lambda (channel modulation):
It will determine the ultimate low frequency performance possible for a simple (no global FB) gyrator.
If you are interested in HF rejection too, capacitance could also be important.
The λ is not specified in the datasheet, only in the spice model (not always).
If the DS has the full set of Id/Vds curves, it can be estimated from the slope of the curves (deviation from horizontality)
It will determine the ultimate low frequency performance possible for a simple (no global FB) gyrator.
If you are interested in HF rejection too, capacitance could also be important.
The λ is not specified in the datasheet, only in the spice model (not always).
If the DS has the full set of Id/Vds curves, it can be estimated from the slope of the curves (deviation from horizontality)
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Thank you. Your posts are pure gold.
Yes I saw that charge is important for high frequencies. The "line" is lower after the ringing.
Thank you I will try to digest everything and come back later.
Yes I saw that charge is important for high frequencies. The "line" is lower after the ringing.
Thank you I will try to digest everything and come back later.