rf_usn
Newbie level 4
Hi all,
I am now designing RF part in the SoC. We all know that the guarding is needed for noise isolation. I have found some papers discussing about the effect of guard ring's width on the isolation. Ex. in the paper "On the P+ guard ring sizing strategy to shield against substrate noise" published in RFIC symposium in 2007, they say that starting from a guarding width above 16 um, the isolation saturates with the guard ring width. Now, let's say that we have 2 blocks that need to be isolated by guard ring; then my question is what is the typical distance between two blocks? Can anyone show me the reference about that? Thank you very much in advance.
Best regards,
rf_usn.
I am now designing RF part in the SoC. We all know that the guarding is needed for noise isolation. I have found some papers discussing about the effect of guard ring's width on the isolation. Ex. in the paper "On the P+ guard ring sizing strategy to shield against substrate noise" published in RFIC symposium in 2007, they say that starting from a guarding width above 16 um, the isolation saturates with the guard ring width. Now, let's say that we have 2 blocks that need to be isolated by guard ring; then my question is what is the typical distance between two blocks? Can anyone show me the reference about that? Thank you very much in advance.
Best regards,
rf_usn.