dody_b Posted March 28, 2005 Report Share Posted March 28, 2005 Hi all …:'(I Quote Link to comment Share on other sites More sharing options...
dody_b Posted March 30, 2005 Author Report Share Posted March 30, 2005 Hii All !!!!!!!!!!! ???do anyone want to help me ?I need a replyPlease :-\Dody Quote Link to comment Share on other sites More sharing options...
plouf Posted March 31, 2005 Report Share Posted March 31, 2005 LM138 supposed to have 0.0 - 0.2% diffirence with a worst case max 0.4duno any other , however the bigger capacitor you add to input the more accurate output it gives ...btw how can a circuit be so strict in power suply ?most components are not so acurate anyway ?it is a reference voltage ? Quote Link to comment Share on other sites More sharing options...
dody_b Posted April 2, 2005 Author Report Share Posted April 2, 2005 Thank you for reply my question I want to use ADC 22 bit, so even 1ms ripple can make my data gone crazy. Is there any more suggestion, I would happy with it :) Quote Link to comment Share on other sites More sharing options...
audioguru Posted April 2, 2005 Report Share Posted April 2, 2005 Hi Dody,You don't give any details about what you want and why, so you have few replies.1) What are you measuring and why doesn't it have its own regulation like an audio amplifier?2) Line regulation?3) Load regulation?3) Ripple rejection?Just a short piece of wire will drop more than only 2mV if it has any current in it.A half-wave rectifier and a tiny filter cap will produce too much ripple voltage. Quote Link to comment Share on other sites More sharing options...
hotwaterwizard Posted April 4, 2005 Report Share Posted April 4, 2005 Why not add a batery into the mix to smothe out the voltage even more. A battery will act as a big capacitor.Use a silver Oxide or Nicad and draw the power from the battery while charging it with the power supply. Quote Link to comment Share on other sites More sharing options...
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