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Design >> Mixed-Signal Design >> How to isolate substrate noise in mixed signal chi
https://designers-guide.org/forum/YaBB.pl?num=1183556587

Message started by jim on Jul 4^th, 2007, 6:43am

Title: How to isolate substrate noise in mixed signal chi
Post by jim on Jul 4^th, 2007, 6:43am

Dear all,

In mixed signal chip, the huge digital block and I/O buffer noise will affect analog circuit performance through substrate,if put the analog block above Deep Nwell will reduce the effect,but some device PNP,Native Transistor are not allowed above Deep Nwell;so I want to put the digital block and I/O circuit above Deep Nwel,but I worry about I/O circuit above Deep Nwell will lead to ESD issue,anyone can give me some suggestion?

Thanks

Jim