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.

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.