pub fn error_budget_nonideal_stacked(
netlist: &AnalogNetlist,
cert: &RangeCertificate,
schedule: &GainSchedule,
target: &AnalogTarget,
model: &NonIdealityModel,
placement: &StackPlacement,
) -> OutputBudgetExpand description
The stacked physical budget: the SAME composition engine as 2D, fed the full separation law — cross-tier legs pay the categorical ceiling, so hot scattering provably costs ε.