A voltage-mode first-order universal filter based on a multiple-input operational transconductance amplifier was designed at 0.5 V in 65-nm CMOS, reporting 10 nW power, 41.7 dB dynamic range, and electronic tunability.
Key findings
- The 65-nm design reported 10 nW and 41.7 dB dynamic range. Tunable transconductance enables electronic frequency control, and the input structure simplifies implementation. Experiments in a different commercial IC technology demonstrated the circuit concept.
Why this matters globally
Ultra-low-power filters matter for wearables, implants, and biosignal sensors. If fabricated performance matches the design, front-end energy could fall, but noise, process variation, electrode artifacts, and real biological signals must be evaluated.
Thai researcher contribution
A KMITL telecommunications-engineering researcher contributed low-power analog-circuit design linking core electronics with biomedical-device applications.
Limitations to consider
The abstract omits noise, THD, bandwidth, PVT corners, mismatch, chip area, and post-layout results. LM13600N testing does not validate 10-nW performance in 65-nm CMOS, and no ECG, EEG, EMG, or clinical-system evaluation is reported.