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Hi Emanuele,
You can use different gnds (multiples ground) in your design :D , with out using DNwell :!:. :idea: You will use a logic layer known as PSUB2 and place it around one of the two grounds you have, and it will lead you to pass LVS
Thanks And best Regards
fady
Hi,
The main important point you must consider in the BandGab layout is the parasitic resistance, rather than parasitic capacitance.
So you have to Route using mult-Stack-Wide-metals between the BJT, Current mirrors, and Resistor Network
Re: Virtuoso LAyout & different analog and digital groun
Hi,
You will need to use the marking layer "PSUB" to define two different substrates. you will use this layer to surround only one ground e.g. Dgnd.
But you have to know that is only marking layer to pass LVS, But if you are working on...
Re: layout question -- diff. b/w material of n-well and n-di
hi vikram789
The Nwell layer is lightly doped region, so we need the N+diff to create highly doped region for the contacts
guard ring for digital part
Hi,
There are some recommendations to use minimum width PTAP GR with very good ground connection to the ring. it is enough
Thanks,
source...
isolated from the substrate by epi process
yes I hav access to shallow trench, deep trench , deep Nwell and Nwell and P+ N+ diffs
At first i make the isolation using deep trench (n+, OD, Nwell, and deep Nwell ), then more than one adv. me to use Deep nwell as it make it as island,
so which...
dnwell layout
hello all
I need to know the different isolation tech that can be done using the DNWELL , like Trench Isolation between RF chanel, or DNWELL under each RF channel .
which is better?and why?
thanks, and have nice day
hello
The effects on the sensitive analog part from the noisy digital part
1- Noise come from the substrate coupling
2- Digital swing affect the supply
solutions
1- Use as many decoupling caps as possible
2- Protect analog cts substarte by using DNW and guard rings with star connection
But DNW meaning that he will use additional mask , and this is not an option at all cases , so in my opinion the use of DNW or P+active will depends on the application
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