Interleaving Active Feedback in Inverter-Based Optical Receivers for Bandwidth Extension and Linearity Improvement
Bibliographic record
Abstract
Main amplifiers are crucial components in the design of optical receivers, amplifying the output voltage of the transimpedance amplifier (TIA). While Cherry-Hooper (CH) amplifiers are widely utilized in optical receivers due to their high bandwidth, they often fall short in linearity, making them less suitable for PAM-4 and higher-order modulation schemes. This study presents a highly linear PAM-4 optical receiver design. The proposed main amplifier employs g<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">m</inf>/g<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">m</inf> inverter-based amplifiers known for their superior linearity. We have applied the interleaving active feedback (IAFB) technique to enhance bandwidth while mitigating gain peaking. Notably, our proposed design operates with a 1 V supply, offers a bandwidth of 20 GHz at a gain of 64 V/V, and achieves a total harmonic distortion (THD) of less than 1% for a 600 mV<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">pp</inf> differential output swing.
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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) | 0.000 | 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".