RE: [TCML] Transistor Questions (slightly O.T.)

[William Noble <william_b_noble@xxxxxxx>]

IGBT with  snubber diode will do this
 
> From: chriskarr4@xxxxxxxxxxx
> To: tesla@xxxxxxxxxx
> Subject: RE: [TCML] Transistor Questions (slightly O.T.)
> Date: Mon, 7 Jun 2010 09:27:49 -0700
> 
> 
> I've received the responses, though I'm still at a loss - what I'm asking is this:
> 
> Has there been a device manufactured, which behaves like a diode with zero base voltage, but when base voltage (negative or positive, base-to-emitter/collector is irrelevant for sake of questioning) is applied, the device turns 'off' and restricts current-flow. The closest analogy I can think of is a transistor which turns off in the presence of a base-current but, when there is zero base-current, is always on.
> 
> Here's an ASCII mock-up of the operation, as it would be seen on an O-scope:
> 
> Base Input:
> 10V ______ ______ ______ _______ ______
> | | | | | | | | | |
> | | | | | | | | | |
> 0V _ |_ _ _ | _ _ _ _ |_ _ _ | _ _ _ _ |_ _ _ | _ _ _ _ |_ _ _ | _ _ _ _ |_ _ _ |
> _________________________________________________________________________________________________________________
> 
> 
> 
> 
> Transistor Output:
> 
> 
> 10V ___ _________ _________ _________ _________ ______
> 
> | | | | | | | | | |
> 
> | | | | | | | | | |
> 
> 0V _ |_ _ _ | _ _ _ _ |_ _ _ | _ _ _ _ |_ _ _ | _ _ _ _ |_ _ _ | _ _ _ _ |_ _ _ |
> 
> Thanks everyone,
> 
> - Christopher
> 
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