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Design >> Analog Design >> sink and source current source from far gnd
https://designers-guide.org/forum/YaBB.pl?num=1425461301

Message started by newic on Mar 4^th, 2015, 1:28am

Title: sink and source current source from far gnd
Post by newic on Mar 4^th, 2015, 1:28am

Hi

Is there any difference to sink or source Iref curent from a current generator (which has good ground) to a blockA which is far far away?
assume both current generator and blockA has the same VDD.

Title: Re: sink and source current source from far gnd
Post by aaron_do on Mar 13^th, 2015, 1:17am

Hi,

just remember that current always flows in a loop. You should be able to model what would happen by including some ground impedance.

If the generator is referenced to the ground at the source, then you are likely to have some "ground bounce" at the load. The current itself will not change unless it is dependent on the load impedance.

regards,
Aaron

Title: Re: sink and source current source from far gnd
Post by newic on Mar 18^th, 2015, 10:21pm

thank you!