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| Re: Basic opamp question [message #338480 is a reply to message #334754 ] |
Fri, 02 May 2008 09:09   |
 Jim Williams
Messages: 462
Registered: May 2005
Location: beautiful carlsbad, CA |
Active Member |
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They made it for Federal consumption, your tax dollars at work.
Hope it's not a switcher.
Jim Williams
Audio Upgrades
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| Re: Basic opamp question [message #338618 is a reply to message #338554 ] |
Fri, 02 May 2008 15:59 |
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Andy Peters
Messages: 781
Registered: April 2004
Location: Tucson, AZ |
Gold Member |
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| Version wrote on Fri, 02 May 2008 10:58 |
| Dave Hecht wrote on Tue, 22 April 2008 01:59 |
The supply you linked to is single sided. If that is the supply you have, you'll need a second supply for +/-15v, or just get a bipolar supply (it'll be easier to rack up). I'd go with external psu, just hook up with a 4 pin XLR should be fine.
Dave Hecht
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Can you help me understand how a power supply can only be single-sided? As I understand power supplies, it's basically a bridge rectifier and then a linear regulator.
The PSU I linked to has 4 terminals:
+ OUT
+ S
- S
- OUT
Sorry for the beginner questions, I did research this and I can't find a straight answer.
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OK, that's a single-output power supply. The thing here is that the output is floating, meaning it can be a positive supply if you tie -OUT to ground, or it can be a negative supply if you tie +OUT to ground.
If you need bipolar (+ and -) rails, you use two supplies. You designate one supply as positive, and your output comes from +OUT, and the other as negative, and its output comes from -OUT. You then tie -OUT of the positive supply to the +OUT of the negative supply, and both go to your chassis/common point. This is important!
Now, the Kelvin sense lines, denoted as +S and -S. For simplicity's sake, you can tie +S to +OUT and -S to -OUT. I can explain further about other ways to configure the sense lines, if you're interested.
-a
"On the Internet, nobody can hear you mix a band."
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| Re: Basic opamp question [message #338621 is a reply to message #338562 ] |
Fri, 02 May 2008 16:01 |
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Andy Peters
Messages: 781
Registered: April 2004
Location: Tucson, AZ |
Gold Member |
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| Version wrote on Fri, 02 May 2008 11:12 |
I understand the polarity, I'm just confused as to why this PSU is single-sided, and therefor not fit for usage in my application.
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It only has one output, the +OUT, and one return, which is the -OUT. Note that there is no "ground" or "common" point for the output.
-a
"On the Internet, nobody can hear you mix a band."
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