Active decap design considerations for optimal supply noise reduction
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Bibliographic record
Abstract
Active decoupling capacitors (decaps) are more effective than passive decaps at reducing local IR-drop problems in the power distribution network. In the basic active decap, two parallel decaps are stacked in series whenever the voltage drop exceeds a given budget to boost the local supply voltage. However, the effectiveness of stacking three or more decaps has not been previously explored. In this paper, we investigate these higher stack height configurations to assess the degree of improvement in supply noise reduction. Extensive simulation results correlated with a test chip indicate that an active decap with a stack height of three provides the best noise reduction if the supply noise level is between 7% -14%, but a stack height of two is best if the noise level is between 14% -16%.
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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) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| 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