ThunderScope Analog Front End - Gain And Attenuation
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- Опубликовано: 15 окт 2024
- First in a series of videos documenting the analog front end design for the ThunderScope open source oscilloscope.
Also check out:
My Hackaday Supercon talk on front ends: • Aleksa Bjelogrlic: A C...
GitHub: github.com/EEV...
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great .. pls dont stop the series ... hopfully there will be soem videos on the software and firmware side as well
i'm working on a 100msps oscilloscope for months now . the attenuation circuit really been a pain. brought out every demon i've been avoiding . you're video came to help just at the right time . but i have a lot to do to get this project done .
Wow, great project!
True Hero ❤️
Cool project.
Doesn't having only one attenuation effect the noise floor in a negative way in certain ranges?
Exactly right, noise will be worse at the lowest input voltage that requires the attenuator. As with everything, this is a tradeoff. In this case it is with cost and complexity. I tuned the attenuator value so that this jump in noise is not noticeable unless you really start benchmarking each range - the attenuation value is another tradeoff, this time with maximum measureable voltage.
great work as always... for me the hardest is really install the software client... its not great if you cant install it lol keep up the good work
I am guessing the upcoming video about that amplifier is going to get into DC coupling and how the aux in stuff works in low frequencies?
Bingo, just uploaded it!
You don't gain up you amplify. Good video.
Hi Aleksa, you are using 8bits adc right?
There is a reason you dis not choose 12 or 14bits adc from analog devices?
Or you intend to leave this upgrade for later?
did you watch the video? He clearly states they are using a 13-bit ADC.
@harry3life yes i saw, but did not match with the PN here and on git.
@@fabioposser2 You are right the datasheet states it's an 8-bit ADC.
Hi! We are now using the HMCAD1520, a 12 bit ADC with an 8 bit mode - it is still 13 bit internally. The beta run was built with that part, I just didn't update the schematic - oops!