Comparative analysis and study of metastability on high-performance flip-flops
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Bibliographic record
Abstract
In this paper, we analyze and characterize the metastability of 11 previously proposed high-performance flip-flops, reduced clock-swing flip-flops, and level-converting flip-flops. From extensive simulation results in 65nm CMOS technology, the main metastability parameters of ¿ and T <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> are extracted and analyzed at both nominal and reduced supply voltage. Our simulation results indicate that these flip-flops exhibit a wide range (up to few orders of magnitudes) of metastability windows. In particular, flip-flops with differential and positive feedback configuration such as the sense-amplifier based flip-flops demonstrate the most optimal metastability. Based on this finding, a novel pre-discharge flip-flop (PDFF) with positive feedback configuration is proposed. Extensive simulation results reveal that PDFF achieves better metastability than the previous proposed flip-flops at both nominal voltage supply and nominal voltage supply with reduced clock-swing.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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 it