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Simulators >> Circuit Simulators >> How to measure current between draina nd source in eldo
https://designers-guide.org/forum/YaBB.pl?num=1244584795

Message started by rajivs1001 on Jun 9^th, 2009, 2:59pm

Title: How to measure current between draina nd source in eldo
Post by rajivs1001 on Jun 9^th, 2009, 2:59pm

Is there any way I could measure the current flowing between source and drain terminal of a transisotr without modifing the netlist ?

Thanks,
-Rajiv

Title: Re: How to measure current between draina nd source in eldo
Post by oermens on Jun 9^th, 2009, 3:19pm

~~Which simulator are you using? If Spectre in ADE, go Outputs>save all...> and theres an option for terminal currents (userprobe)~~ my mistake, i guess i didnt read the whole thread title

Title: Re: How to measure current between draina nd source in eldo
Post by rajivs1001 on Jun 9^th, 2009, 3:29pm

I was asking about ELDO simulator.

Thanks,
-Rajiv

Title: Re: How to measure current between draina nd source in eldo
Post by jiesteve on Jun 9^th, 2009, 4:59pm

Add the following line to your spice deck:

.PROBE I(Mxx.D) or
.PROBE I(Mxx.S)

where Mxx is the instance name of the MOS you are interested in.

Title: Re: How to measure current between draina nd source in eldo
Post by rajivs1001 on Jun 11^th, 2009, 9:21am

I was under the impression that I(Mxx.D) measures current between Drain and bulk but I verified that my assumption was not correct.
Thanks for the reply.

Regards,
-Rajiv

Title: Re: How to measure current between draina nd source in eldo
Post by Geoffrey_Coram on Jun 12^th, 2009, 10:26am

Note that I(Mxx.D) includes drain to bulk current, but usually that's smaller than the channel current.