56/28-Gb/s PAM4/PAM2 Impedance-Modulated Transmitter Enabling 44-dB/58-dB Loss Compensation at 14 GHz in a 7-nm FinFET Transceiver
Why this work is in the frame
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Bibliographic record
Abstract
This letter reports a 56-Gb/s PAM4, 28-Gb/s PAM2 transmitter that utilizes impedance modulation to implement pre-emphasis postcursor and precursor and low impedance postcursor modes. Implemented as part of a 7-nm FinFET transceiver, the multimode impedance modulated transmitter can compensate for 44- dB/58-dB channel loss in PAM4/PAM2 which is the highest loss compensation reported to date @56 Gbps. The transmitter achieves an impressive figure-of-merit of 0.86-pJ/bit per volt of differential output swing and surpasses its current mode logic based counterpart by a wide margin in terms of power and performance.
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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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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