You need a high beta.

----- Original Message ----- 
From: "Spehro Pefhany" <speff@interlog.com>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Friday, May 12, 2006 10:13 AM
Subject: Re: [EE]: NPN Transistor with low switch on voltage?


> At 02:29 PM 5/12/2006 +0100, you wrote:
>>Hi all
>>
>>I'm finding it hard to search transistors by Vbe ON voltage,
>>basically I need a NPN with a fairly high sensitivity, ie saturates
>>at a small voltage on the base.
>>
>>Any ideas, nothing to specialised though, just cheap and fairly
>>available.
>>
>>Thanks
>>Ed
>
> That's because it's pretty much the same for *any* silicon BJT
> at reasonable base currents (around 0.7V at room temperature).
>
>>Best regards,
>
> Spehro Pefhany --"it's the network..."            "The Journey is the 
> reward"
> speff@interlog.com             Info for manufacturers: 
> http://www.trexon.com
> Embedded software/hardware/analog  Info for designers: 
> http://www.speff.com
> ->>Test equipment, parts OLED displys 
> http://search.ebay.com/_W0QQsassZspeff
>
>
> -- 
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist 

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist