An efficient first order sigma delta modulator design
Why this work is in the frame
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Bibliographic record
Abstract
An efficient first order sigma delta modulator has been designed in circuit level, considering the possible non-idealities in 65 nm CMOS technology. This study at first determines the non-idealities of sigma delta modulator. The non-idealities investigated here are clock jitter noise that effects the input signal and increases total error power; then the thermal noise of switches caused by the random fluctuation of carrier that increases the total noise power. Thereafter, circuit leakage causes the limited DC gain and affects signal to noise ratio. Moreover, limited slew rate and gain bandwidth of op-amp, which are both regarded as non-linear gain, reduce signal to noise sum distortion ratio. Based on optimum circuit simulation, the non-idealities are reduced by using folded cascode op-amp at integrator stage with DC gain of 65 dB, slew rate of 3.76 V/μs, and gain bandwidth with 40 MHz. Finally, a first order sigma delta modulator with 8 bit resolution, 64 oversampling ratio as well as power supply of ±2.5 V is successfully designed using PSPICE simulation tool, which can be implemented for practical usage.
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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 | 0.001 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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