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

 BJT Differential Pair (解說版)

「用 Claude 做類比 IC 設計」系列頁面12345678910111213141516171819模型：NPN β 200、V_A 100 V；橫向 PNP β 50、V_A 50 V、τ_F 30 ns；V_T 25.85 mV、V_BE 0.65 V回到部落格文章

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