High-voltage DC/DC converter for high-efficiency power recovery in implantable devices
Why this work is in the frame
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Bibliographic record
Abstract
Implantable biomedical devices such as sensors and neurostimulators require a near-field inductive link to transmit power wirelessly. However, the near-field induced voltage is usually much larger than the compliance of low-voltage integrated circuit technologies. Thus most integrated power recovery approaches limit the induced signal to low-voltages with inefficient shunt regulation, or voltage clipping. We propose using a high-voltage (HV) CMOS technology to fully integrate the inductive power recovery front-end while adopting a step-down approach where the induced signal is limited to a much higher voltage (20 V). We previously reported a first IC that includes a HV rectifier and a HV regulator, which provide up to 12 V regulated DC supply from a 20 V maximum AC input. In this paper, we report the design of a second HV custom IC that completes the front-end by integrating an adjustable step-down switched capacitor DC/DC converter (1:3, 1:2 or 2:3 ratio). The IC has been submitted for fabrication in DALSA-C08E technology and the total silicon area including pads is 9mm2. Post-layout simulation results show that the DC/DC converter achieves more than 90 % power efficiency while providing about 3.9 V output with 12 V input, 1 mA load, 1:3 conversion ratio, and 50 kHz switching frequency.
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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