2.671 GHzRepresentative caseUNKNOWNInspect metric contract
9 oscillatorsCasesUNKNOWNInspect metric contract
final 7 periodsExtractionUNKNOWNInspect metric contract
SIMULATION / SKY130_RINGOSC_001
Ring oscillator frequency
Ring Frequency
Close an odd inversion loop and turn inverter delay into a measurable oscillation frequency.
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.
- Start with a 3-stage loop and watch why the nodes cannot settle.
- Compare frequency across 3, 5, and 7 stages.
- Use the result to connect feedback, period, and delay.
RUN CARD
Conditions before conclusions.
The public catalog exposes saved oscillation data and netlists only.
Primary knobs
- Stages: 3, 5, or 7
- Load per stage: 1 fF, 5 fF, or 10 fF
- Transient window: 30 ns
- Startup: UIC with alternating node voltages
Saved outputs
- frequency
- period
- stage delay
- average source power after startup
EXPORT
Download the public artifacts.
These exports are the supported public files for review. PDK files and restricted third-party material are not redistributed.
Dataset JSON
/data/sky130-ringosc-web-v1.json
Open file ->Netlist manifest
/data/sky130-ringosc-netlist-manifest-v1.json
Open file ->7-stage 10 fF netlist
/data/ringosc_7stage_10ff.spice
Open file ->METHODS
How the number was made.
Methods are written for citation discipline: the extraction rule matters as much as the plotted value.
Find VDD/2 rising crossings after startup.
Keep this method attached when reusing the figure or metric.
Average the final seven rising-edge periods when available.
Keep this method attached when reusing the figure or metric.
Compute frequency from the mean period.
Keep this method attached when reusing the figure or metric.
Publish the source netlist hash for every stage/load combination.
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.
Educational oscillator benchmark only; not a silicon-frequency prediction.
Carry this boundary into any derivative note, paper draft, or slide.
Routing parasitics, variation, package effects, and aging are excluded.
Carry this boundary into any derivative note, paper draft, or slide.
Average power is not signoff power.
Carry this boundary into any derivative note, paper draft, or slide.
The visible startup condition is part of the reproduced setup.
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.
Verification records 9 cases and all cases oscillated.
SKY130_RINGOSC_001
The provenance block includes the SKY130A commit and every netlist SHA-256.
SKY130_RINGOSC_001
Waveform samples are included for browser replay and review.
SKY130_RINGOSC_001
Public execution boundary
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