Re: simple 150uA constant current supply

On Sun, 30 Mar 2008 20:49:36 +0100, in sci.electronics.design "Dave"
<daveh@xxxxxxxxxxxx> 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.
Anyone ?
Thanks
Dave

Sounds like a homework assignment, but I'd start off with a 150V rail
and a 1Meg resistor


martin
.

Relevant Pages

  • Re: simple 150uA constant current supply
    ... 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 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 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)