On Tue, 23 Jul 2002, Richards, Justin P wrote:

> I thought it was dependant on the polarity.  I am unsure of the thread
> title.
>
> I have a 50% chance here...
>
> Collector to load for NPN, Emitter to load for PNP if using them to
> simply switch the load.


*****************
>
> Warning: Before use allow 24 hours for this reply to set especially as
> Vasile has already provided a response I would be sceptical of mine.
>
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Shut me if I understood this one !
Does it's an english mother's tongue, please ?

BTW, load to colector for a PNP too is very usual... as load to emiter for
a NPN. Depends on load and on designer brains, especially the last one ;o)

best, Vasile


> Justin
> -----Original Message-----
> From: Vasile Surducan [mailto:vasile@S3.ITIM-CJ.RO]
> Sent: Tuesday, 23 July 2002 16:17
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [EE]:Load at Collector or Emitter?
>
>
> A load in collector allows the transistor to saturate which is good if
> you are dealing with switching modes or large loads. A load in emitor
> must
> take care about the command parameters ( Ib or Vbe ), a large load in
> emiter
> will need a large command voltage or a way to pass the command to a high
>  +V voltage. There are so many ways to solve the requirements as the
> birds
> on the sky. ( including driving loads under constant current )
>
> regards,
> Vasile
> http://www.geocities.com/vsurducan
>
>
> On Tue, 23 Jul 2002, Pang wrote:
>
> > Hi all,
> >
> > I remember reading some advice on piclist that mention the issue of
> putting
> > the load at either the collector or the emmiter end. Does anyone
> remember
> > the title of the thread?
> >
> > Rgds,
> > Pang
> >
> > --
> > http://www.piclist.com hint: The PICList is archived three different
> > ways.  See http://www.piclist.com/#archives for details.
> >
> >
>
> --
> http://www.piclist.com hint: The PICList is archived three different
> ways.  See http://www.piclist.com/#archives for details.
>
> --
> http://www.piclist.com hint: The PICList is archived three different
> ways.  See http://www.piclist.com/#archives for details.
>
>

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.