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-   -   Constant Current Source article (Old) (http://www.diyaudio.com/forums/solid-state/4123-constant-current-source-article.html)

 tvi 19th June 2002 04:40 PM

Constant Current Source article (Old)

2 Attachment(s)
Found this the otherday, thought it might be of interest.

As the article is from 1966 I hope its alright to post, if their is a proble, tell me and I will delete.

Constant-Current Circuits
PETER J. BAXANDALL
WIRELESS WORLD, DEC 1966

James

 tvi 19th June 2002 04:49 PM

2 Attachment(s)
page 2 again

 tvi 19th June 2002 05:13 PM

If you were one of the first to download Page1 & 2, I just updated page 2 as their was a minor error

<i>Z=R<sub>c1</sub> || R<sub>c2</sub>||R<sub>bb</sub>, where Rn is ...</i>
should have been:
<i>Z=R<sub>c1</sub> || R<sub>c2</sub>||R<sub>bb</sub>, where R<sub>bb</sub> is...</i>

Apologetically
James

 tiroth 19th June 2002 05:19 PM

There is that funky || notation again. Weird.

 tvi 19th June 2002 05:22 PM

|| = in parallel with, AFIK

AFIK = As far As I know, AFIK

James

 annex666 10th September 2002 08:49 PM

Quote:
 Originally posted by tiroth There is that funky || notation again. Weird.
Correct me if I'm wrong, but is this right?

A||B = (AB)/(A+B)

The rule for parallel devices, resistors etc.

 hifi 10th September 2002 09:59 PM

A||B = 1/(1/A +1/B) = 1/((A+B)/AB) = AB/(A+B)

/micke

 HarryHaller 10th September 2002 10:14 PM

Jfet constant current source

Great ap note on Jfet CCS.

http://www.vishay.com/document/70596/70596.pdf

H.H.

 L Daniel Rosa 11th September 2002 02:44 AM

What CCS do you use, and what for? I see that Morsel is working on one to load an opamp. How's that one coming? That one's jfets, right? When you use one in a project, is it an afterthought? If not, is the main PCB designed with it, or is it a replacement for a resistor?

As I've said before, I've drawn a few. They all use BJTs. I print 'em by the dozen. I don't want to believe that my fascination (read: obsession) was a waste of time. Does anybody want to try a few?

 fireworks 9th June 2012 05:07 PM

Quote:
 Originally Posted by HarryHaller (http://www.diyaudio.com/forums/solid-state/4123-constant-current-source-article-post58786.html#post58786) Great ap note on Jfet CCS. http://www.vishay.com/document/70596/70596.pdf H.H.