A 79dB SNDR, 10MHz BW, 675MS/s open-loop time-based ADC employing a 1.15ps SAR-TDC
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Bibliographic record
Abstract
This paper introduces a first-order noise-shaped time-domain ADC utilizing SAR-TDC as quantizer. The high resolution correlated double sampling SAR-TDC improves the quantization noise level of the ADC. The VCO non-linearity is resolved by employing a 1-bit folded VCO architecture. The ADC linearity is further improved using foreground digital calibration. Implemented in 65nm CMOS, the 675MS/s time-domain ADC achieves measured peak SNDR/SFDR of 79.5/86.4dB in 10MHz BW while consuming 11.65mW. The SAR-TDC achieves 1.15ps resolution with peak measured DNL/INL of 0.64/0.65LSB. The 1-bit folded VCO improves the VCO linearity from 12% to 0.17%.
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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 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 it