Available load power in a RF class D amplifier with a sigma-delta modulator driver
Why this work is in the frame
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Bibliographic record
Abstract
A conventional RF class D amplifier is nonlinear and is limited to constant envelope signals. By augmenting a RF class D amplifier with a sigma-delta (/spl Sigma//spl Delta/) modulator, the class of signals is extended to include time varying envelope signals. The available load power delivered by a class D amplifier depends on the spectral properties of the /spl Sigma//spl Delta/ pulse train. A measure called coding efficiency is defined to quantify the spectral characteristics of the pulse train and the parameter is incorporated in class D design equations. The average pulse frequency of the /spl Sigma//spl Delta/ pulse train affects switching losses in the amplifier and the average pulse frequency for a fourth order bandpass modulator is simulated. A 1W 1 GHz voltage switched class D amplifier is designed and simulated to verify the coding efficiency and average pulse frequency parameters.
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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) | 0.004 | 0.002 |
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