Topic 41 JFET Parameter Measurement
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- Опубликовано: 14 май 2024
- In this video we will experimentally determine the Idss and Vgs(off) values for ten MPF102 JFETS. This data is averaged and used to create transconductance and drain curves for a typical device. We finish up by using an online equation graphing application to produce plots of the resulting transconductance curves for the JFETs .
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Can you recommend some readily available JFETs?
You might try the BF256, J111, J109 and J112 N-Channel and J175 P-Channel. They’re cheap and places like DigiKey have them. There are lots on Amazon too but I don’t know about their authenticity.
Do current Fet's in tiny SOT323 package also deviate that much?
The MPF102 has an especially wide variation of parameters on paper but I rarely see any with Idss over 10 mA. Most of the newer JFETs have a narrower spread.
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