Behavioral Modeling of Opamp Gain and Dynamic Effects for Power Optimization of Delta-Sigma Modulators and Pipelined ADCs
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Bibliographic record
Abstract
This paper proposes a simple, yet accurate, analytical model for the effect of opamp gain and dynamics (slew rate and bandwidth) on the transfer function of switched-capacitor (SC) amplifiers and integrators. Furthermore, it demonstrates the detrimental effects of: a) the nonlinear variation in the opamp dc gain; and b) the feedforward transmission of the feedback capacitor, on the harmonic distortion and settling behavior of these SC stages. These effects, typically ignored in the behavioral simulations of SC stages, are analyzed and modeled. Thus, accurate behavioral simulations of ΔΣ modulators or pipelined analog-to-digital converters (ADCs) can be performed in SIMULINK, using the proposed models for their SC building blocks (integrators or amplifiers). The proposed behavioral models are validated in HSPICE. Behavioral simulation examples are presented to illustrate the importance of such accurate modeling for low-power design.
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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) | 0.000 | 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