A 2–5 Gb/s fully differential 3X oversampling CDR for high-speed serial data link
Bibliographic record
Abstract
This paper presents the design and implementation of a fully differential 3X oversampling clock and data recovery (CDR) circuit for high-speed serial data link. The CDR is capable of operating at any speed from 2 to 5 Gb/s. The architecture of the CDR replaces the analog VCO and loop filter used in analog PLL based CDR with digital circuits. The CDR uses a digital threshold decision technique to improve the jitter tolerance performance. System level simulation shows that the CDR has a high frequency jitter tolerance of 0.67 UI and acquisition time of 8 baud period. The CDR is implemented in 65 nm CMOS process technology. The post-layout simulation is performed for 27-1 PRBS data. The CDR consumes 39 mW from 1.1 V power supply at 5 Gb/s. The core CDR circuit occupies an area of 0.013 mm2.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".