General > General Technical Chat

cheap opamps with offset like TLE2141 ?

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Zero999:

--- Quote from: Dbldutch on May 04, 2022, 10:46:02 am ---Thanks for the quick reply. It does't bother me, since it's an old and no longer relevant circuit, but the source should be mentioned. I don't see the image tags though, just as a matter of interest, how do I get to see them?
Thank you!

--- End quote ---
Click on the quote button to see the source code used to make the post. I don't know  much about website design, but I'm aware of ways to prevent people from accessing files on your server, unless they load the page. It's certainly something to investigate, if it offends you.

Regarding the original topic: why use the TLE2141 as a simple comparator? It's a daft idea: way overkill. There are much cheaper, better suited alternatives, such as the LMC7211, which is designed to be used as a comparator. The only reason a sane person would use the TLE2141 is if they have loads in stock and no comparator chips to hand.

Simon:
If you are that bothered put you blog address on the picture.

Dbldutch:
Yes, that is the link, good find. This was a prototype Curve Tracer based on an a very old commercial DIY design. It evolved over a few years into a very good and much more complete design, credit to a small team. Links are in the blog.

The reason for the overkill Opamp instead of a comparator is simple. I had a large stash of these Opamps from another project and no comparators at the time. It worked and did the job for that project. The original design of the circuit wasn't really mine as you can see in the blog, but that is beside the point. I made sure credit was published where it was due. As we should always do.

I found the url of the original picture. Thanks. Unfortunately it gets to the original location, but doesn't really get you to the Blog post itself.

Never mind, I found this circuit and wanted to alert the user. 'Nough said, thanks for chiming in.

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