CMOS Optoelectronic Sensor with Ping-pong Auto-zeroed Transimpedance Amplifier
Bibliographic record
Abstract
This paper presents a new low power sensing architecture for fiber photometry applications. The proposed design consists of a CMOS photodiode, a differential low noise amplifier modified by a novel switched-gate ping-pong autozeroed architecture, an automatic phase alignment feedback, a demodulator, low-pass filter, and band-pass filter that are integrated on a CMOS chip. In the proposed design, employing precise phase adjustment channel and applying the switchedgate technique on ping-pong structure increase the sensitivity and remove the low frequency noise and offset with a low power consumption. Based on the post-layout simulation results with 0.18 μm CMOS technology at 1 kHz operating frequency, the transimpedance amplifier of the front-end detection unit has 40 dB gain, and a DC offset rejection factor of 16 dB and its input referred noise is 90 pA/√Hz. The lock-in amplifier has a sensitivity of 100 MV/A while consumes only 345 μW power from 1.8 V supply voltage and has an input detection range of 1 pA to 1nA. Besides, the results of the phase DAC of the automatic phase alignment feedback show that the DNL is less than 0.5 LSB, and the maximum INL is less than 1.2 LSB when the resolution is 15 bits that means the LSB is equal to 6.7 μs.
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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 | 0.000 |
| 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 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".