<div id="RTEContent">Yes. You must have a really light load... but you can do it.<br> My last project I got to under 200mV but my load is industrial<br> and i have to sink some current from the load itself. I could<br> use a lower value resistor, but that started to hurt me on the<br> high side (the current source / sink not symmetrical).<br> <br> I was still proud... the unit I was driving said "0-10V" but<br> it didn't go lower than 700mV<br> <br> Did everybody see the EDN design idea (might have been electonic<br> design 'ideas for design' also) with the active current sink to being the<br> LM324 down to ground. Gee... only a CA3046 and some other components.<br> Doh... buy a real opamp. Well... OK if you were on Apollo 17, it might<br> be a viable design<br> <br> H^) harry<br> <br> <br><br><b><i>Ian Fritz <ijfritz@earthlink.net></i></b> wrote:<blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: !
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At 07:51 PM 1/5/06, harrybissell wrote:<br><br>>I'd sat the LM324 'is' a single supply opamp (primarily and<br>>preferredly)...<br>><br>>It does have input common mode range down to 'ground' (thank you PNP<br>>input<br>>stage)... and the output can come within 200mV to 700mV of ground...<br>>pretty damn close in most cases.<br><br>Harry, Jim, et al. --<br><br>I discovered a trick -- if the output has ~3k to ground, then it will come <br>to within ~4mV of ground. I used the LM324 for all the analog controller <br>signals in my MIDI wind controller:<br>http://home.earthlink.net/~ijfritz/sos_circ.htm<br><br> Ian <br><br></blockquote><br></div>