Electronics > Projects, Designs, and Technical Stuff
Current Reference IC for V & C Reference Standard Box
<< < (4/5) > >>
t1d:

--- Quote from: Vgkid on April 03, 2020, 08:30:13 pm ---Try this link, its in chinese.
http://bbs.38hot.net/forum.php?mod=viewthread&tid=17593&extra=page=9&mobile=2

--- End quote ---
Nope, still a vendor ad for cell phones... Look at the link address = "38hot." That's the name of the vendor site. What should I be seeing?
oPossum:
Fixed link: http://bbs.38hot.net/forum.php?mod=viewthread&tid=17593
beanflying:
Good link to that Chinese site. Google translate does an ok job  :-+

And just because Bob Pease is always worth a watch. Off to rummage around in my other PC....

t1d:
That's an amazing link. Thank you.

I will watch the video. Later today, I hope. Thanks for it.
David Hess:

--- Quote from: t1d on April 03, 2020, 01:09:15 pm ---
--- Quote from: David Hess on March 31, 2020, 02:18:19 pm ---Current references usually rely on the voltage reference and a precision resistor.
--- End quote ---

I have been looking at this, a bit. It certainly is easy and direct.

I wonder about using a digital pot. I understand that it would only adjust in bracketed steps, which would limit achieving accuracy between the steps. However, if there are a lot of steps, it seems to me that a digital setting would be as good as you could dial in with a trimmer, by hand. Thoughts?
--- End quote ---

Digital pots tend to have poor absolute accuracy and are intended to be used as dividers.

A switched capacitor circuit can generate a precision variable current from a voltage within the limits of the accuracy of the capacitor but fixed resistors will be more accurate and easier to use.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod