Track-and-hold and comparator for a 12.5GS/s, 8bit ADC
Bibliographic record
Abstract
This paper discusses the design and characterization of a track-and-hold amplifier (THA) and a comparator which are the essential building blocks of an 8 bit, 12.5 GS/s folding-interpolating analog to digital converter (ADC) with a 3 GHz bandwidth. The circuits are implemented in a 0.25 mum, 190 GHz SiGe BiCMOS process. The THA occupies an area of 0.5 mm2. It features a SNDR of 47 dB or 7.5 bits ENOB for a 3 GHz bandwidth, a hold time of 21 ps with a droop rate of 11 mV/80 ps and a power dissipation of 230 mW from a 3.3 V supply. The comparator occupies an area of 0.38 mm2and exhibits an input sensitivity of plusmn2 mV, an input offset voltage of 1.5 mV, latch and recovery times of 19 and 21 ps respectively and a power dissipation of 150 mW from a 3.3 V supply.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 |
| 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) | 0.005 | 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 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".