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SIMULATION / SA-MEM-DEPTH-SENSE-001

SRAM sense amplifier decision margin
Sense Margin

Replay bitline differential, offset sigma, attenuation loss, positive margin, and decision-time interpretation before claiming a sense amplifier can resolve.

sectionExploresectionRun CardsectionExportsectionMethodssectionLimitssectionEvidence

EXPLORE

Start with the observable.

Use this page when the simulation is the primary artifact. The linked lesson explains the concept; the linked lab keeps the visual replay surface available.

guided exploration
  • Compare bitline differential against a 3-sigma offset budget before reading timing.
  • Notice that unsafe cases do not receive a decision-time number.
  • Use attenuation loss to keep peripheral loading visible in the claim.
Open visual lab ->Open lesson ->

RUN CARD

Conditions before conclusions.

The page replays saved memory-depth data. It does not run a latch sense amplifier or user SPICE job.

precomputed replay

Primary knobs

  • Bitline differential: 60, 80, 100, 120 mV
  • Offset sigma: 10, 15, 20 mV
  • Attenuation-loss proxy: 8 or 12 mV
  • Pass rule: positive decision margin before timing interpretation
outputs

Saved outputs

  • decision margin
  • resolved/unsafe label
  • decision time for safe cases
  • offset and attenuation method card

EXPORT

Download the public artifacts.

These exports are the supported public files for review. PDK files and restricted third-party material are not redistributed.

download

Dataset JSON

/data/sram-sense-amplifier-decision-margin-web-v1.json

Open file ->
download

Model script

/data/sram_memory_depth_models.mjs

Open file ->
download

Model card

/data/sram-memory-depth-model-card.md

Open file ->

METHODS

How the number was made.

Methods are written for citation discipline: the extraction rule matters as much as the plotted value.

method

Subtract a 3-sigma offset budget and attenuation-loss proxy from the bitline differential.

Keep this method attached when reusing the figure or metric.

method

Assign decision time only after the decision margin remains positive.

Keep this method attached when reusing the figure or metric.

method

Keep offset, attenuation, and bitline development as separate evidence fields.

Keep this method attached when reusing the figure or metric.

LIMITS

What this page does not claim.

The MVP is useful because the limits are visible. These statements prevent a teaching simulation from being cited as silicon evidence.

non-claim

Offset sigma and attenuation are synthetic teaching parameters, not measured mismatch data.

Carry this boundary into any derivative note, paper draft, or slide.

non-claim

No latch transistor sizing, RC extraction, kickback, metastability tail, supply noise, or Monte Carlo run is included.

Carry this boundary into any derivative note, paper draft, or slide.

non-claim

Decision time is an illustrative mapping from margin to delay; it is not a characterized sense-amplifier specification.

Carry this boundary into any derivative note, paper draft, or slide.

non-claim

This replay is a run card for paper-reading discipline, not a macro timing signoff result.

Carry this boundary into any derivative note, paper draft, or slide.

EVIDENCE

Trace the claim back to artifacts.

The evidence route remains the catalog-level browser; this page is the simulation-level reading card.

evidence note

The dataset records twelve margin cases and explicit unsafe cases.

SA-MEM-DEPTH-SENSE-001

evidence note

Verification checks that larger offset sigma reduces margin.

SA-MEM-DEPTH-SENSE-001

evidence note

The model card states why the replay is not a sense-amplifier signoff result.

SA-MEM-DEPTH-SENSE-001

Source spine

These links anchor the public teaching model. They do not convert the replay into a qualified process recipe or signoff result.

UCLA eScholarship SRAM sense amplifier thesisPublic thesis used for offset, attenuation, control-timing, and sense-amplifier vocabulary.Grossar et al. SRAM read stability and write-abilityPublic paper used for read-stability, write-ability, SNM, and N-curve vocabulary.NVIDIA reverse write assist and SRAM VMIN paperPublic paper used to anchor assist, reverse assist, VMIN, guardband, and canary vocabulary.CS61C average memory access time notesPublic course note used for hit time, miss rate, miss penalty, and AMAT vocabulary.

Public execution boundary

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