Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

How should I use "power cut" cell from foundary to separate power ring?

Status
Not open for further replies.

ee484

Full Member level 3
Joined
Jan 4, 2005
Messages
153
Helped
5
Reputation
10
Reaction score
3
Trophy points
1,298
Activity points
1,559
Hi,

Have you guys used power cut for your pad rings?

In pad rings, it has vdd, gnd..etc. I would like to have separate vdd for digital and analog. Let's say I am sharing ground.
How should I use "power cut" cell from foundary to separate power ring.
After I use this "cut", then original vdd (say, for digital) won't make a circle any longer?

I am wondering what does look like for my pad/pad ring after power cut is used.

Any reference or figure is welcome.

Thanks,

B
 

power cut

Hi,

What you say is correct. If you use power cut cell, usually the VDD are connected by several reverse biased diode. You do this to help ESD of the analog pad.

Another way is to physically separate the pads. In this way, the gnd and vdd are cut.

You need to use the correct pad types in different style. Refer to the analog pad application for instruction.

Regards,
Eng Han
 

power cut

I'm quite confused with so much sepetated supply rails,pad ring,esd rail,power cut....
can anyone give a figure as example...
THX

Added after 1 minutes:

hi,I'm quite confused with so much seperated supply rails,esd rail,pad ring,power cut... stuffs,can anyone give a figure to illustrate them clearly?
THX!!
 

power cut

you'd better to see your pad integration guide for more details
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top