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Related Experiment Video

Updated: May 14, 2026

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver

Published on: August 27, 2021

Nano-Power OTA-Based Low-Pass Filter for Ultra-Low-Energy Biomedical Signal Processing.

Tomasz Kulej¹, Montree Kumngern², Fabian Khateb^3,4

¹Department of Electrical Engineering, Czestochowa University of Technology, 42-201 Czestochowa, Poland.

Sensors (Basel, Switzerland)

|May 13, 2026

Summary

This summary is machine-generated.

This study introduces ultra-low-power circuits for biomedical signal processing. The designed operational transconductance amplifier (OTA) and low-pass filter (LPF) consume nanowatts, enabling efficient wearable healthcare devices.

Keywords:

ECG conditioning OTA biomedical signal processing low-pass filter subthreshold CMOS ultra-low-power circuits

More Related Videos

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Published on: May 11, 2014

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Last Updated: May 14, 2026

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver

Published on: August 27, 2021

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Published on: May 11, 2014

Area of Science:

Integrated circuit design
Biomedical engineering
Low-power electronics

Background:

Energy constraints in wearable biomedical devices necessitate ultra-low-power signal conditioning circuits.
Traditional circuits often consume too much power for long-term, continuous monitoring applications.

Purpose of the Study:

To present a nanowatt-scale operational transconductance amplifier (OTA) and an electronically tunable third-order low-pass filter (LPF).
To enable energy-constrained biomedical signal conditioning for wearable healthcare applications.

Main Methods:

Implementation in a 65 nm CMOS process with deep subthreshold biasing.
Schematic-level simulations including Monte Carlo and PVT corner analyses.
Validation using simulated electrocardiogram (ECG) signals.

Main Results:

Achieved 1.75 nW total power consumption for the OTA and LPF.
OTA demonstrated 50 dB gain, 225 Hz bandwidth, and 1.55 μV/√Hz noise.
LPF offered a wide tuning range (37-668 Hz), 0.059% THD, and 65.3 dB dynamic range.
Simulations confirmed robustness against process variations and effective ECG artifact suppression.

Conclusions:

The designed circuits provide a viable solution for ultra-low-power biomedical signal conditioning.
This work serves as a proof-of-concept for next-generation wearable healthcare architectures.
The demonstrated performance metrics are suitable for energy-constrained biomedical monitoring.