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jun chen, 03/29/2025 09:29 PM
IR analysis¶
Reference Flow¶
IR drop analysis Background:¶
You can check "Inside SPICE engine" section of SPICE_for_lib_and_package (lect07_element_stamping.pdf)
So that you can get a brief idea of Nodal Analysis
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IR drop analysis Basics¶
Check IR drop analysis core engine in IR_drop_analysis_and_validation.pptx
Check IR drop analysis code flow in IR_drop_analysis_and_validation2.pptx
Static IR analysis with circuit partition IR_drop_analysis_and_validation3.pptx
xGraph-pGraph structure and flow (by 冯叩倩叩 xgraph_pgraph.pptx
pGraph construct (By 000 ) node_build.pptx
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Dynamic IR analysis¶
Chip_Package_Co-Simulation¶
High Performance IR Analysis¶
timing window file (twf)¶
Custom Model EMIR (Memory, I0, PAD, IP)¶
Known issues¶
- Vector-less IR is not tested
- gp and pl will call vector-less IR, but not tested
- If clock is not specified, min clock will selected, but cells do not belong to that clock will not switch (Not align with ref tool)
- Vector-less flow also accept VCD?
Project feature list¶
| Supply model support for dynamic IR drop analysis | QHH 202010 | supply_model.pptx |
| Circuit partition for static IR | DTH 202103 | TBD |
| Circuit partition for dynamic IR | DTH 202103 | TBD |
| GSS for static IR | DTH 202103 | TBD |
gu class definition¶
| guXform | to scale, rotate graphic object |
| guPoint | point graphic object |
| guRect | Rectangle graphic object |
| guTrect | ?? |
| guTrapz | trapezoid graphic object, only accept four points |
| guPointlist | point list |
| guPolygon | Polygon shape |
| guScanline | to handle concave or convex shape |
| guPolyPath | ?? |
| guTrapzlist | trapezoid list |
| guGrid | Create point grids within an area, length |
| guBin | Binary search to locate a shape |
| guMask | Shape and, or, not operation |
| guPattern | ?? |
Updated by jun chen 4 months ago · 3 revisions