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Ultralow Noise Amplifier

🕑 Added 2020-08-16 20:33:27 +0000 UTC

Comments

Marco Reps

Seen it! A very sophisticated solution whereas I am just relying on good opa performance :)

Anders Petersson

Many tips in TI 0.1-10 Hz noise filter: https://www.ti.com/lit/ug/slau522/slau522.pdf This could be useful for a lot of people!

Nikolaus Juch

A colleague of mine built a low noise amp which goes down to 1/10Hz and he didn't use any fancy tantalum caps so maybe you can do the same 😉

Nikolaus Juch

You could use a two stage design for your amplifier, you can dimension the first stage that even with the worst leakage current of you cap you don't hit the supply rails and then use a second dc block with a higher gain amplifier afterwards that way you won't have that much leakage anyways because you've got a lower dc bias 🤔

Marco Reps

Yeah, EAGLE was okay years ago. Now it feels like 10 new shiny UI layers on top of fundamental code from 1988

Rush Robbins

Lots of KiCad showing up! Didn't you use EAGLE before? What brought you over? :)

Marco Reps

It got even more ambitious than I originally wanted it to be 😅 It's a team effort now, happening mostly on the discord server. It'll take a lot longer, but it will be worth it. This power output stage is one of multiple candidates we are considering https://github.com/marcoreps/lt1166_bob