Re: Curve Tracer

On 8/02/2025 2:52 am, john larkin wrote:

On Fri, 7 Feb 2025 14:18:48 -0000 (UTC), Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:
 

piglet <erichpwagner@hotmail.com> wrote:

Bill Sloman <bill.sloman@ieee.org> wrote:

On 7/02/2025 8:18 am, john larkin wrote:

On Thu, 6 Feb 2025 23:11:58 +1100, Chris Jones
<lugnut808@spam.yahoo.com> wrote:
>

On 6/02/2025 2:45 pm, Bill Sloman wrote:

<snip>

Right. Those dual-chip things are not much better thermally then two
SOT-23s mounted close on a board.

They will be quite a bit better. You might come close if you put your SOT-23 devices close together and covered them with a blob of thermally conductive elastomer, but two devices in the same package will end up quite a bit closer together, and the packaging material will probably have quite a bit better thermal conductivity than any material you could risk blobbing onto a board.

I make current mirrors now and then, with an opamp and a mosfet. Or,
sometimes, just an opamp. That's way more accurate than the transistor
versions.

And lot slower and more expensive,

Hey, Dr Hobbs, what is the attraction that Ph.D.s seem to have for
current mirrors?

Bob Widlar didn't have a Ph.D. Neither did Jim Thompson. Both used them a lot.
Barry Gilbert did have a Ph.D. and he was even more enthusiastic.
--
Bill Sloman, Sydney