CMOS DAC-sharing stimulator for neural recording and stimulation arrays
Bibliographic record
Abstract
A compact biphasic neural stimulator for use in multi-channel integrated neural recording and stimulation interfaces is presented. The stimulator is a part of an envisioned closed-loop implantable microsystem for adaptive neural stimulation. The stimulator reuses the capacitive DAC inside the recording SAR ADC to provide 8-bit current amplitude resolution and reconfigures the digital SAR controller logic to provide 4-bit tunability of the duty cycle of the current pulse. A voltage-to-current converter and a current driver are the only additional circuits required. An OTA is reused to provide accurate current matching and to remove excess charge on the electrode. The stimulator is implemented in a standard 0.13μm CMOS technology. Post-layout and Monte Carlo simulation results show 8-bit functionality from 5μA to 1.2mA, a 2.5V swing and 1 percent current matching between positive and negative pulses.
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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 | 0.001 |
| 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".