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Old 19th June 2002, 04:40 PM   #1
tvi is offline tvi  Australia
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Default Constant Current Source article (Old)

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
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Old 19th June 2002, 04:49 PM   #2
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page 2 again
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Old 19th June 2002, 05:13 PM   #3
tvi is offline tvi  Australia
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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
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Old 19th June 2002, 05:19 PM   #4
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There is that funky || notation again. Weird.
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Old 19th June 2002, 05:22 PM   #5
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|| = in parallel with, AFIK

AFIK = As far As I know, AFIK

James
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Old 10th September 2002, 08:49 PM   #6
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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.
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Old 10th September 2002, 09:59 PM   #7
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A||B = 1/(1/A +1/B) = 1/((A+B)/AB) = AB/(A+B)

/micke
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Old 10th September 2002, 10:14 PM   #8
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Thumbs up Jfet constant current source

Great ap note on Jfet CCS.

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

H.H.
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Old 11th September 2002, 02:44 AM   #9
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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?
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Old 9th June 2012, 05:07 PM   #10
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Quote:
Originally Posted by HarryHaller View Post
Great ap note on Jfet CCS.

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

H.H.
The link doesn't work (anymore).
What was the name of the document, so I can search for it ?
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