A bandwidth enhancement technique for CMOS TIAs driven by large photodiodes
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Bibliographic record
Abstract
A new method of enhancing the bandwidth of a conventional series-peaked transimpedance amplifier (TIA) driven by a large photodiode is introduced. It is shown that by using N identical TIAs in parallel the circuit bandwidth can be significantly improved. The advantage of the proposed technique is in its ability to provide large bandwidth enhancements in multi-GHz frequency ranges even when photodiode capacitance is large, without a noticeable increase in TIA core circuit area. This technique is supported by a design example simulated in a 0.13μm standard CMOS technology. Simulation results show a 3dB bandwidth of 26GHz with 0.5pF photodiode capacitance, a transimpedance gain of 51dBΩ and group delay of 33.5±4ps. The proposed technique shows an overall bandwidth enhancement ratio of 3.25 with less than 0.1dB gain ripple resulting in higher bandwidth enhancement than previously reported for large photodiode capacitances.
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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 | 0.000 |
| 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) | 0.002 | 0.000 |
Machine scores (provisional)
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Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
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