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Re: Layout RF
Isn't easy to summarize the line guide for RF layout.
- symmetry
- minimize capacitance parassitcs in critical net
- take in account the coupling due to high frequency
- isolate and protect sensitive/aggressive blocks
- good contact of substrate
Anyway a good reference is "The...
Re: resistance of path
I don't think you can verify it by some tool.
Only way is calculate it manually considering width, lenght and resistivity and don't forget to take in account the VIAS.
Bye Bye
Re: OPC for dummy
OPC is a photolithography enhancement technique commonly used to compensate immage errors. OPC increase the fidelity of pattern transfer to the wafer.
Usually in technology used by me, you have the possibility to generate dummy with or without OPC.
hello,
why you don't use the 2fF or 4fF as unit capa?
In this case you can use 2 capa to obtain 1fF, but you can reduce the number of capa and so you can have more simple routing.
Bye
triple well device lvs
The triple well could be solve the problem but, can you use it? You should discus this with the designer.
In your layout you have Psub contact connected in different point. you can solve this error in two way:
1) find the floating contact, and connect them all togheter...
gndpad
Hello,
in your "Design Rule Manual" or "Assembly Rule Manual" you should find all the info about the PAD.
Usually different PAD structure are are used for different use, es: RF signal PAD, Power supply PAD, Wire bonding, Bumping .......
Bye
layout common centroid current mirror
In my opinion the common centroid is the best choice in terms of matching, but of course in High Frequency is all more difficult.
You have to choice the best compromise between matching-simmetry-parassitics.
Good luck
1) Yes, the ground plate and the power plate should be big enough to decrease the impedence. The capacitance between the POWER and GROUND is welcome.
2) Of course, you should take care about the routing of the signal path. You have to avoid to cross noise signal, power or gorund.
Bye
A good layout start with a good floorplan.
The advantage of floorplan are more and more:
- Estimate and optimize the area.
- Understand the correct position of each block in order to avoid to put noise block near sensitive block.
- indivuate the critical path.
- understand how you can separate...
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