12.5-Gb/s Full-Rate CDR With Wideband Quadrature Phase Shifting in Data Path
Bibliographic record
Abstract
A 12.5-Gb/s full-rate clock and data recovery (CDR) circuit that utilizes an open-loop quadrature clock generator for wideband 90°phase shifting in the data path is presented. The differential clock from a voltage-controlled oscillator (VCO) is split into quadrature phases and subsequently mixed with data to provide in-phase and quadrature components of the data over a broad range of frequencies in the vicinity of the nominal data rate. The quadrature data phases are employed for the detection of clock phase misalignment in a mixer-based phase detector. A proof-of-concept prototype chip that integrates the critical building blocks of the proposed CDR is fabricated in a 90-nm CMOS technology. The CDR achieves a bit error rate of-12in response to 231- 1 pseudorandom-binary-sequence data, while the chip (which excludes VCO) consumes 84 mW from a 1.2-V supply.
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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 | 0.001 | 0.001 |
| 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) | 0.003 | 0.002 |
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".