🚀 go-pugleaf

"Jamie" <jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote in message 
news:KiRAg.50$zK3.38@fe03.lga...
> ib.mossin@hotmail.com wrote:
>> Hi,
>>
>> I'm trying to figure out how thyristor and triacs work. I understand
>> that a thyristor conducts when it's gate recieves a current pulse and
>> continues to conduct as long as forward biased. How does this differ
>> from a ordinary bijunction transistor operating in cutoff and
>> saturation with base working as "the gate"?
>>
>> A triac is two thyristors connected together. Right? I don't see the
>> practical use for such a device. Can you give me a hint?
>>
>> Best regards,
>> John
>>
>  almost..
>    thyristor latches and maintains when you remove the current
> from the gate that switched it on.
>    what opens the thyristor is when the current flowing through
> its Anode and cathode falls below the holding spec.., at that point
> is when the thyristor will thus open ..
>
>

I'd still like to know why my SCR conducts in both directions with only a 
positive gate signal. See my previous post "Detecting open gate on SCR 
switch" of 7/17/06 for more details.

Paul