8.7 A 112Gb/s ADC-DSP-Based PAM-4 Transceiver for Long-Reach Applications with >40dB Channel Loss in 7nm FinFET
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Bibliographic record
Abstract
Driven by the proliferation of rich media services and a drastic increase of data availability, the demand for high-speed data transfer in the data center continues to grow at greater than 26 percent year-over-year [1]. This urges the imminent solution of top-of-rack switches in hyperscale networks with faster I/O interfaces to simultaneously support both low power and high throughput. Supporting the substantial bandwidth increase has driven the development of new electrical and optical interconnect standards which enable 100Gb/s per channel including IEEE 802.3ck and CEI-112G with PAM-4 modulation in conjunction with forward error correction (FEC) [2]. For long-reach applications, a transceiver architecture with >40dB channel equalization is critical due to the extra 8-10dB package insertion loss. To resolve those bottlenecks, this work presents an ADC-DSP based PAM-4 transceiver capable of equalizing >41.5dB lossy channels and achieving 112Gb/s per channel and 896Gb/s overall retimer throughput in 7nm FinFET.
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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 | 0.001 |
| 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