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epp
Joined: 04 Mar 2004
Posts: 264
Helped: 8
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 09 Oct 2004 18:06 Current measurement |
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How to measure current in Pspice?
I need to compare it with an reference current so I can clock some latch.
Thanks
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djalli
Joined: 10 Nov 2001
Posts: 887
Helped: 15
Location: 1600 Pennsylvania Avenue, Washington DC 20500
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| 09 Oct 2004 19:07 Current measurement |
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Normally divide voltage you measure on resistor and divide with resistance value and you know current passing in that resistor. Even is Spice.
In what situation you want to measure?
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nicleo
Joined: 06 Sep 2004
Posts: 717
Helped: 60
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| 10 Oct 2004 6:18 Current measurement |
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| If I'm mistaken, there are current and voltage probes to measure, isn't it?
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djalli
Joined: 10 Nov 2001
Posts: 887
Helped: 15
Location: 1600 Pennsylvania Avenue, Washington DC 20500
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| 10 Oct 2004 7:12 Current measurement |
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| Yes in OrCAD PSpice there are. IN real world you probe voltage accross.
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prinsloo
Joined: 19 Sep 2004
Posts: 94
Helped: 1
Location: Bethlehem RSA
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| 10 Oct 2004 18:17 Re: Current measurement |
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Just read your help topics,thats a start. 
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Hughes
Joined: 10 Jun 2003
Posts: 712
Helped: 84
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| 11 Oct 2004 0:33 Re: Current measurement |
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| epp wrote: |
How to measure current in Pspice?
I need to compare it with an reference current so I can clock some latch.
Thanks |
Use .probe statement:
.probe ID(M1)
I(name): current through a two terminal device
Ix(name): current into a terminal of a three or four terminal device
(x is one of B, D, G, or S)
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ianomaley
Joined: 06 Aug 2004
Posts: 12
Helped: 1
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| 12 Oct 2004 16:48 Re: Current measurement |
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If it is helpfull, you can also add a dummy device to your circuit like a 0V DC source, or negligible resistor.
Some time ago I have worked on PSPICE 9 on defining custoim functions (like the current comparator you mention). I can search on my files (will take some time) If it seems helpful for you.
Ian
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epp
Joined: 04 Mar 2004
Posts: 264
Helped: 8
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| 12 Oct 2004 17:44 Re: Current measurement |
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| djalli wrote: |
Normally divide voltage you measure on resistor and divide with resistance value and you know current passing in that resistor. Even is Spice.
In what situation you want to measure? |
I need to know inductor current so I can control my actively clamped resonant inverter.
I know what is voltage and current probes and I don't care about current value.
I need to compare it with reference current in order to drive transistors.
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HCM_bucat
Joined: 29 Sep 2004
Posts: 81
Helped: 3
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| 12 Oct 2004 18:40 Re: Current measurement |
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| Pspice can do the jobs you mention, Read the manual you will find out
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