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vrf Choosing Power Supplies

Question asked by VRFuser on Nov 4, 2004
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML><HEAD><META http-equiv=Content-Type content="text/html; charset=us-ascii"><META content="MSHTML 6.00.2900.2523" name=GENERATOR></HEAD><BODY style="COLOR: #000000; FONT-FAMILY: Arial"><DIV dir=ltr align=left><SPAN class=708460214-05112004><FONT size=2>Not sure I get this, if you allow the voltage to be constant and the current to ramp, then either you are setting the limits for current to cutoff or you have a dynamic load that will comply, i. e. v/i.</FONT></SPAN></DIV><DIV dir=ltr align=left><SPAN class=708460214-05112004><FONT size=2></FONT></SPAN> </DIV><DIV dir=ltr align=left><SPAN class=708460214-05112004><FONT size=2>So if your system is running too slowly, suggest you either ramp current an allow the voltage to comply, up to your limit of 5 volts, or you should ramp voltage and allow current to comply, set current at its high limit.</FONT></SPAN></DIV><DIV dir=ltr align=left><SPAN class=708460214-05112004><FONT size=2></FONT></SPAN> </DIV><DIV dir=ltr align=left><SPAN class=708460214-05112004><FONT size=2>The guys are correct, the direct i/o is faster, but you might want to see if you can find a plug and play driver, which will work as well since it will use the direct i/o.</FONT></SPAN></DIV><DIV dir=ltr align=left><SPAN class=708460214-05112004><FONT size=2></FONT></SPAN> </DIV><DIV dir=ltr align=left><SPAN class=708460214-05112004><FONT size=2>......................</FONT></SPAN></DIV><DIV dir=ltr align=left><SPAN class=708460214-05112004><FONT size=2></FONT></SPAN> </DIV><DIV dir=ltr align=left><SPAN class=708460214-05112004><FONT size=2>Now the other issue, if you really need delta i and V a constant, then would you not also need a dynamic load, that is, set the voltage, and ramp the load.</FONT></SPAN></DIV><DIV dir=ltr align=left><SPAN class=708460214-05112004><FONT size=2></FONT></SPAN> </DIV><DIV dir=ltr align=left><SPAN class=708460214-05112004><FONT size=2></FONT></SPAN> </DIV><DIV dir=ltr align=left><SPAN class=708460214-05112004><FONT size=2>rufus</FONT></SPAN></DIV><BR><DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><HR tabIndex=-1><FONT face=Tahoma size=2><B>From:</B> Amrik Sekhon [mailto:Amrik.Sekhon@geeplus.biz] <BR><B>Sent:</B> Thursday, November 04, 2004 12:42 PM<BR><B>To:</B> VRF<BR><B>Subject:</B> [vrf] Choosing Power Supplies<BR></FONT><BR></DIV><DIV></DIV><DIV><SPAN class=358173517-04112004><FONT size=2>Hi Guys and Gals</FONT></SPAN></DIV><DIV><SPAN class=358173517-04112004><FONT size=2></FONT></SPAN> </DIV><DIV><SPAN class=358173517-04112004><FONT size=2>i have come across a cropper. I am using a agilent 6612c power supply. With this i use a fixed voltage 5V and ramp the current between 0 and 1.6A.</FONT></SPAN></DIV><DIV><SPAN class=358173517-04112004><FONT size=2></FONT></SPAN> </DIV><DIV><SPAN class=358173517-04112004><FONT size=2>However the way i control my supply which is the only way i know how, it takes too long to cycle the power on my unit once. I control my supply using panel drivers, and each time i want to increment a value i have to increment the value in the panel driver. I need a source with a function that will ramp the supply automaticaly between set values, whilst returning these values to vee.</FONT></SPAN></DIV><DIV><SPAN class=358173517-04112004><FONT size=2></FONT></SPAN> </DIV><DIV><SPAN class=358173517-04112004><FONT size=2>Is there any supplies or signal generators out there that can respond quickly and also return values that i can read.</FONT></SPAN></DIV><DIV><SPAN class=358173517-04112004><FONT size=2></FONT></SPAN> </DIV><DIV><SPAN class=358173517-04112004><FONT size=2>If anyone knows of something i am all ears.</FONT></SPAN></DIV><DIV><SPAN class=358173517-04112004><FONT size=2></FONT></SPAN> </DIV><DIV><SPAN class=358173517-04112004><FONT size=2>Cheers</FONT></SPAN></DIV><DIV><SPAN class=358173517-04112004><FONT size=2></FONT></SPAN> </DIV><DIV><SPAN class=358173517-04112004><FONT size=2>Amrik</FONT></SPAN></DIV><P></P>---<BR>You are currently subscribed to vrf as: rwarren@amti.net<BR>To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com".<BR>To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com".<BR>To send messages to this mailing list, email "vrf@agilent.com". <BR>If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com". <BR><P><FONT size=2>---<BR>Outgoing mail is certified Virus Free.<BR>Checked by AVG anti-virus system (http://www.grisoft.com).<BR>Version: 6.0.783 / Virus Database: 529 - Release Date: 25/10/2004<BR></FONT></P>---<BR>You are currently subscribed to vrf as: rsb@soco.agilent.com<BR>To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com".<BR>To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com".<BR>To send messages to this mailing list,  email "vrf@agilent.com".  <BR>If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".</BODY></HTML>  

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