ept.git/hw_sim/NOTES.md, branch xiang Unnamed repository; edit this file 'description' to name the repository. Noise fix quantified (2us window = 3.2x headroom at 1.3x schedule) + JLC board costing (MVP -350/5, Stage-1 rig -220/5, T64 boards ~-4k => machine ~-15k) 2026-07-18T11:53:21+00:00 Yuren Hao yurenh2@illinois.edu 2026-07-18T11:53:21+00:00 cbe9fdde199869ff687d44a4ff26ddceb05d0fed Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn 
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn
Fix: Sam Dillavou is one person (UPenn), not two collaborators 2026-07-18T09:02:35+00:00 Yuren Hao yurenh2@illinois.edu 2026-07-18T09:02:35+00:00 01ffb2becc72eda775f0761a64c2d94964683404 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn 
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn
Fab strategy: JLC SMT + socketed screened MDACs + DFT layout + first-article 5; SKiDL->KiCad->Gerber/BOM/CPL scripted order package 2026-07-18T08:53:51+00:00 Yuren Hao yurenh2@illinois.edu 2026-07-18T08:53:51+00:00 805d481ae05f69ac7991fbb33237542321dcfd0a Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn 
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn
Energy ledger: SPICE core 2.87pJ/MAC; boards lose ~1000x (trainability demos); coherent integrated projection 0.21-0.63 pJ/MAC = parity-to-5x vs digital, ADC-dominated — honest range, not CIM marketing 2026-07-17T21:01:23+00:00 Yuren Hao yurenh2@illinois.edu 2026-07-17T21:01:23+00:00 98935725be4e33bd4e0f6830bf56e180fd1c98ed Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn 
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn
Stage C: SPICE-in-the-loop training — SPICE == behavioral == ideal (0.0213/0.0213/0.0211, all 100% acc); fidelity ladder certified; 7200 ngspice solves in 26s 2026-07-17T20:57:00+00:00 Yuren Hao yurenh2@illinois.edu 2026-07-17T20:57:00+00:00 7ae978808165d29019d8cb814dbbbb6246e82805 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn 
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn
hw_sim v1.1: ENOB-after-cal 8.51b (clears 7.0 bar; per-bit mismatch model) + noise budget 138.7uV vs 100uV floor = MARGINAL -> hardware wall-1 quantified, wants big nudges 2026-07-17T20:50:57+00:00 Yuren Hao yurenh2@illinois.edu 2026-07-17T20:50:57+00:00 cd5c1b8910407ba5f00e56d56ac5a9b9f48aa92b Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn 
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn
hw_sim: bus-settle fix menu parked as Dillavou session question (incl user's precharge-rotation idea) 2026-07-17T20:44:10+00:00 Yuren Hao yurenh2@illinois.edu 2026-07-17T20:44:10+00:00 07c585a5233023164c1193835885ea02e6cf1c41 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn 
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn
hw_sim v1: datasheet-anchored column — C_bus=5.4nF kills naive design (16.6us); best comp point 3.14us borderline vs 3us commit gate; offset rejection x3088; three design options logged 2026-07-17T20:37:05+00:00 Yuren Hao yurenh2@illinois.edu 2026-07-17T20:37:05+00:00 1f8145768b77e2171e27fef33bc683e5a453beb6 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn 
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn