Analog IC Design (OP741, diff pair, Placement & Routing)

BJT Differential Pair 

schematic

Quadratic  Placement

ILP+ PathFinder +A* Routing

 (share)

Plus Pseudo Multi-layer Router (95% reduction of congestion md) no via report

corrected vias reported

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

neat lohas style

2-stage diff pair (share from very simple diff pair), block diagram,  die, 

schematic (B&W), schematic (color)

corrected

P&R, P&R Best from 1 stage diff pair

tuning (slides)

Phantom exclusion 

artifact

 viz

add overlap penalty in placement stage

benchmark