Re: simple 150uA constant current supply



Dave wrote:
I would like to find the simplest way to provide a constant current of around 150uA (+/-20%) at around 2V.
This needs to be discrete components rather than IC and should not involve pulse width modulation.
The simplest form I thought of was a 3v voltage reg with a 20K resistor between it's 'reference ground' and the output but this seems clumsy.

I think this article might give you some starting point:
http://waltjung.org/PDFs/Sources_101_P2.pdf

--
Regards,

John Popelish
.



Relevant Pages

  • Re: simple 150uA constant current supply
    ... This needs to be discrete components rather than IC and should not involve ... pulse width modulation. ... The simplest form I thought of was a 3v voltage reg with a 20K resistor ...
    (sci.electronics.design)
  • Re: simple 150uA constant current supply
    ... This needs to be discrete components rather than IC and should not involve pulse width modulation. ... The simplest form I thought of was a 3v voltage reg with a 20K resistor between it's 'reference ground' and the output but this seems clumsy. ...
    (sci.electronics.design)
  • Re: simple 150uA constant current supply
    ... This needs to be discrete components rather than IC and should not involve ... pulse width modulation. ... The simplest form I thought of was a 3v voltage reg with a 20K resistor ...
    (sci.electronics.design)
  • Re: simple 150uA constant current supply
    ... This needs to be discrete components rather than IC and should not involve ... pulse width modulation. ... The simplest form I thought of was a 3v voltage reg with a 20K resistor ...
    (sci.electronics.design)
  • Re: simple 150uA constant current supply
    ... This needs to be discrete components rather than IC and should not involve ... pulse width modulation. ... The simplest form I thought of was a 3v voltage reg with a 20K resistor ...
    (sci.electronics.design)