Supply-Insensitive Digitally Controlled Delay Lines for 3-D IC Clock Synchronization Architectures
Bibliographic record
Abstract
This brief presents an on-chip autotuning algorithm to reduce the supply voltage sensitivity of digitally controlled delay lines constructed using identical digital buffers. The proposed algorithm tunes a compensator circuit embedded within each buffer to counterbalance the supply sensitivity of the overall delay line regardless of process or mismatch variations. A 3-D IC mismatch-insensitive skew compensation (MISC) architecture employing this delay line is fabricated in 65-nm CMOS and demonstrates robust performance against the buffer supply noise at operating frequencies of 250 MHz to 1 GHz. The rms jitter of this supply-compensated MISC design measures 3 ps in the presence of a 25-mV 1-MHz supply noise at 1-GHz operation, compared to 112.3 ps for the conventional design, whereas the maximum residual skew between the Die-1 and Die-2 clocks measures under 30 ps across the entire MISC frequency range.
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How this classification was reachedexpand
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 | 0.000 |
| 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".