Spurs modeling in direct digital period synthesizers related to phase accumulator truncation
Bibliographic record
Abstract
This paper presents an analytic model of the spurious noise frequencies in direct digital period synthesizer (DDPS) due to phase accumulation truncation. DDPS is a new technique for frequency synthesis that takes advantage of the speed and low jitter of a delay-locked-loop-based frequency multipliers and the ability to digitally control the frequency from the direct digital synthesis technique DDS according to Calbaza and Savaria (2000) and Calbaza and Savaria (2002). The most important source of spurious noise frequencies in a DDPS circuit is the truncation of the output of its phase accumulator. Computing spectral analysis of DDPS circuit is a CPU time consuming task. Based on series of analytic calculations, a general and simple mathematical formula of the location of spurious frequencies and their magnitudes is predicted. This formula will help designers analyze and develop new DDPS circuits faster.
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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".