Path: ...!weretis.net!feeder9.news.weretis.net!news.quux.org!eternal-september.org!feeder2.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Jeroen Belleman <jeroen@nospam.please>
Newsgroups: sci.electronics.design
Subject: Re: Curve Tracers
Date: Sun, 24 Nov 2024 16:10:54 +0100
Organization: A noiseless patient Spider
Lines: 47
Message-ID: <vhvfem$28vnm$2@dont-email.me>
References: <vhkhcg$2ip8$2@dont-email.me>
 <673e03a2$4$2783$882e4bbb@reader.netnews.com>
 <fhhsjj5ptu03hoo99g1ki6s85ffq98t2gb@4ax.com>
 <nnd$5e3741d8$5b7c5ebb@c73972a4fb49040b>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Date: Sun, 24 Nov 2024 16:07:03 +0100 (CET)
Injection-Info: dont-email.me; posting-host="e124415e4e94cf487ad85c7cd5b516ad";
	logging-data="2391798"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX19iMeV89JQAu/cMsV/J/Zw3"
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101
 Thunderbird/102.13.0
Cancel-Lock: sha1:/kHVCStrV474bdTI9kWfXXKq0LQ=
In-Reply-To: <nnd$5e3741d8$5b7c5ebb@c73972a4fb49040b>
Content-Language: en-US
Bytes: 2965

On 11/24/24 15:34, albert@spenarnc.xs4all.nl wrote:
> In article <fhhsjj5ptu03hoo99g1ki6s85ffq98t2gb@4ax.com>,
> john larkin  <jl@glen--canyon.com> wrote:
>> On Wed, 20 Nov 2024 10:43:34 -0500, bitrex <user@example.net> wrote:
>>
>>> On 11/20/2024 6:32 AM, Cursitor Doom wrote:
>>>> Gentlemen,
>>>>
>>>> Curve tracers reveal useful info about the dynamic characteristics of
>>>> semiconductors and make designing for same much more predictable and
>>>> dependable than relying on spice models and simulation alone. But they're
>>>> typically rare beasts and expensive to come by and boat anchor varieties
>>>> are seriously heavy and bulky.
>>>>    I think therefore that a curve tracer would make an excellent project,
>>>> using the X&Y inputs of a scope as the display. Has anyone here attempted
>>>> this? I'd be interested to know what the main challenges are likely to be.
>>>>
>>>> -CD
>>>
>>>
>>> A bit more modern way to do this is get one of those HP data acquisition
>>> units like a 34970A with a multiplexer card, and a multi-output PSU that
>>> can both be controlled over GP-IB
>>
>> GPIB ain't modern! It's 50 years old.
>>
>> Ever read the actual spec? The state diagrams will give you nightmares
>> for weeks.
> 
> The Dutch Forth user group has a HP plotter 7470A, handboek, spare pens.
>   The idea is to have hooked it up to a computer. Apparently not so easy.
> 
> Any bids on a double 8" floppy HP9895A?
> 
> Groetjes Albert

Nah! You want a Prologix ethernet-gpib interface. I was very happy
with that gadget. On the negative side, I see they increased its
price by a factor two-and-a-half since I bought one in 2016! It
was $200. Now it's $500!

Jeroen Belleman