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Constant Current Source (CCS) For Audio Applications
Constant Current Source (CCS) For Audio Applications
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Old 20th September 2017, 09:08 AM   #61
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by Elvee View Post
This is not really a two-terminal CCS, unless you are ready to accept unpleasant tradeoffs.
Here are some examples of 2 wire CCS, some of which can be designed with a -0.3%/C tempco:
Improved 2W current sources (II)
Elvee,
I have posted a couple of questions in your old Thread.
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Old 20th September 2017, 02:09 PM   #62
Mark Johnson is offline Mark Johnson  United States
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Constant Current Source (CCS) For Audio Applications
[LM334 makes quite a nice 5.5 mA current source, works down to 2.0-2.2 volts

Includes measured Current-vs-Voltage plot of two-terminal (floating) current source.

For 250 volt operation, replace the JFET with one of these very nice Supertex depletion mode Nchannel MOSFETs link to Mouser

~

Last edited by Mark Johnson; 20th September 2017 at 02:12 PM. Reason: add Mouser link
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Old 20th September 2017, 04:47 PM   #63
anatech is offline anatech  Canada
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Constant Current Source (CCS) For Audio Applications

Hi Andrew,
Elvee will have notification emails to that effect, so making a post saying you posted somewhere else isn't helpful.

-Chris
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