Performance predictions for n-p-n Al/sub x/Ga/sub 1-x/N/GaN HBTs
Why this work is in the frame
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Bibliographic record
Abstract
Predictions of the attainable current gain and cut-off frequency of n-p-n Al/sub x/Ga/sub 1-x/N/GaN HBTs are made using compact models. This analytical approach allows the minority-carrier lifetime in the base to be readily identified as a critical parameter in the determination of the gain. For realistic values of lifetime, room-temperature gains in the region of 200-2000 should be attainable, with a graded-base being necessary for highest performance. Gains around 100 are predicted for operation at 600 K. Design of the base is shown to be also important in attaining high cutoff frequencies: a value around 30 GHz would appear to be the upper limit, and its realization would need a graded-base device. Spontaneous polarization is shown to be unlikely to have a major impact on device performance. On the other hand, incomplete ionization of the base dopant is shown to be an important factor.
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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 | 0.001 | 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