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Matching Idss of Fets (Is this setup OK)
Matching Idss of Fets (Is this setup OK)
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Old 15th July 2017, 02:55 AM   #1
bOTL is offline bOTL  United States
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Default Matching Idss of Fets (Is this setup OK)

Hello
First time using fets.
Please chime in if this is a proper method to get Idss.
I am setting the Vds to 10volts and getting the Idss from the reading across the 1K resistor. All DMM are set to DCV.
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Last edited by bOTL; 15th July 2017 at 02:58 AM.
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Old 15th July 2017, 03:19 AM   #2
rayma is offline rayma  United States
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Quote:
Originally Posted by bOTL View Post
if this is a proper method to get Idss.
For measuring Idss, you must short the G-S terminals together. That's what the "ss" means.
So, only one supply is needed. Make sure that the Vds remains well over Vp, to ensure saturation.

Don't forget device static sensitivity when handling.

Last edited by rayma; 15th July 2017 at 03:28 AM.
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Old 15th July 2017, 03:41 AM   #3
bOTL is offline bOTL  United States
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Quote:
Originally Posted by rayma View Post
For measuring Idss, you must short the G-S terminals together. That's what the "ss" means.
So, only one supply is needed. Make sure that the Vds remains well over Vp, to ensure saturation.

Don't forget device static sensitivity when handling.
Thanks for the reply
G-S are shorted that is where the - of the supply is hooked up the + is connected in front of the 1K resistor. There is only 1 supply, using 2 DMM to measure. 1 for Vds (10v) and the other for the Idss(across the 1k resistor).
So I assume this setup is OK?
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Old 15th July 2017, 03:44 AM   #4
rayma is offline rayma  United States
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Quote:
Originally Posted by bOTL View Post
G-S are shorted that is where the - of the supply is hooked up
Then it should be good.
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Old 15th July 2017, 03:46 AM   #5
bOTL is offline bOTL  United States
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Quote:
Originally Posted by rayma View Post
Then it should be good.
Thank You For the Conformation
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