MEDSA: A Memristive-passive Delta-Sigma ADC Circuit for Detecting Neural Signals
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Bibliographic record
Abstract
In this study, we present an analog-to-digital converter (ADC) optimized for implantable neural interfaces. The proposed ADC integrates a series of memristors in both the input and feedback Digital-to-Analog Converter (DAC), significantly boosting the input impedance and making it suitable for neural interfaces. A defining feature of the ADC is the ability of the memristor resistance to adapt to various conditions such as large DC offset, motion, and stimulation artifacts. The model was simulated using 65nm MOSFET technology along with a physical memristor model, yielding an impressive signal-to-noise-and-distortion ratio (SNDR) of 62.7dB and a substantial Nyquist sampling rate of 50kHz. Power consumption is remarkably low, with less than nW for integrators, 5μW for the comparator, and 0.45 μW for the feedback DAC - a key requirement for neural interfaces implanted in the brain. The ADC demonstrates strong resilience against component mismatch, maintaining circuit stability even in variable conditions. Through its ability to adjust input resistance, the ADC can enhance its SNDR. This adaptive and robust ADC design shows promising potential for implantable neural interface applications.
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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