Ok, I've got to ask:

Can someone please explain why a resistor is needed and how it could matter
where it was placed?

I could see that the resistor will limit the current which is charging up
the gate,but how this would be likely to hurt either the PIC or the FET I
don't really understand.


Thanks,

Sean



At 11:32 PM 2/22/99 -0500, you wrote:
>>Bob and Dave have both made very good points regarding series
>resistors in
>>the gate leads of MOSFETs.  I'd just like to add that the resistor
>should be
>>located as close as possible to the FET as possible.  I had one
>engineer
>>forget that - he kept burning up $20.00 FETs because the resistors
>were on
>>the processor board, about 18" away from the FETs.  Moving the
>resistors
>>right to the FET gate leads eliminated the problem.
>
>
>ROTFLMAO!!
>
>I never have that problem, I couldn't fit a trace that long :)
>Good point though!  Unlike clock leads, you want the resistor on the
>destination end in this case!
>
|
| Sean Breheny
| Amateur Radio Callsign: KA3YXM
| Electrical Engineering Student
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