[AMPS] Blown TL922A... What to do?
measures
2@vc.net
Mon, 11 Sep 2000 07:49:08 -0700
>
>measures wrote:
>>The grid protection circuits I am talking about are those that provide no
>>protection because the transistor that interrupts has too low a current
>>rating and it shorts during a glitch -- thereby affording no protection.
>>
>Failure of that transistor to survive a glitch/arc/parastic/flash-
>over/whatever is a simple DC design fault that can be cured by a 10K
>resistor.
>
A 10k-ohm resistor can prevent C-E shorts due to excessive collector
current?
>I don't think that's a good reason to remove grid current protection for
>normal operation.
Replacing a shorted transistor with a fuse-R is hardly removing
protection. Shorted transistors afford no protection because they can
not turn off.
>
cheers, Ian
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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