Placement & Rotuing

RF Power Amplifier

PA Placement

original, fixed (hardcoded), SA 1, QP, QP+SA (Small WireLen, non 0 viol.), 

• QP+SA with adaptive cooling schedule (2.55 WireLen, usual. 0 viol.) 
• add c
  ongestion penalty in energy (track overflow significantly reduced, Overflow Comp, Stats)

QP+ILP+PrePass (No A* or SA, viol.) comparison with ACS summary, detail

Slides

BJT Differential Pair 

schematic

IC Die — Parameter Optimization by SA 

 share

artifact

Quadratic  Placement

ILP+ PathFinder +A* Routing

 (share)

Plus Multi-layer Router (95% reduction of congestion md)

Plus Symmetry Hard Constraint (cong=0 match>97%, artifact)

neat lohas style