BlackMelon
- Aug 7, 2012
- 188
- Joined
- Aug 7, 2012
- Messages
- 188
Hello guys,
I'm checking my MOSFET cuz I want to know that it's dead or not..
I was checking it without a power supply but only a digital multi-meter. I've got an infinite drain-source resistance with the + probe on drain and the - probe on source but after I swapped the probes, I got a reading of 5.88 Megaohms
Is it uncommon to have different values of resistance when swapped those probes?
Is this the effect from the current from multimeter battery which is injected to the Drain-Source? If so, should the
drain-source and source-drain resistance be different from each other so much?
PS. I was trying to bias her with a power supply too. When it was biased with an 8V Gate-Source voltage, I got 0 ohms reading on drain-source resistance which is still the same after I swapped the probes.
When it was biased with 0V Gate-Source voltage, I got an infinite resistance with + probe on Drain and - probe on Source. After I swapped the probes, I got 5.879Megaohms.
I would be very grateful if you could provide me some theory background too
Thank you
BlackMelon
I'm checking my MOSFET cuz I want to know that it's dead or not..
I was checking it without a power supply but only a digital multi-meter. I've got an infinite drain-source resistance with the + probe on drain and the - probe on source but after I swapped the probes, I got a reading of 5.88 Megaohms
Is it uncommon to have different values of resistance when swapped those probes?
Is this the effect from the current from multimeter battery which is injected to the Drain-Source? If so, should the
drain-source and source-drain resistance be different from each other so much?
PS. I was trying to bias her with a power supply too. When it was biased with an 8V Gate-Source voltage, I got 0 ohms reading on drain-source resistance which is still the same after I swapped the probes.
When it was biased with 0V Gate-Source voltage, I got an infinite resistance with + probe on Drain and - probe on Source. After I swapped the probes, I got 5.879Megaohms.
I would be very grateful if you could provide me some theory background too
Thank you
BlackMelon
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