Ultra-Low Power (pico-Watt) Voltage-Level Sensor for Battery Level Monitoring and Energy Harvesting

הרקע לפרויקט:

The Internet of Things has enabled devices at the edge which either have a very small battery or function from Energy Harvesting. It is very important to monitor the amount of charge left in the supply voltage to see if the sensor can remain operational or the battery requires replace. In the case of bio-implantable devices, this battery replacement can involve an operation on the patient. Thus a voltage-level sensor is required which consumes the bare minimum of power to indicate whether the battery or energy harvester has sufficient charge in it for the IOT device to function.

מטרת הפרויקט:

In this project you will design an accurate voltage level sensor to determine the amount of charge left in a battery or energy harvester. This sensor has to consume the absolute bare-minimum amount of power (pico-Watts) yet give an accurate DC response. This will involve designing ultra-low-power circuits including a reference voltage generator and comparator as well as digital support circuitry.

תכולת הפרויקט:

You will need to learn the theory and then implement the circuit in 65nm CMOS. The schematics will be prepared in Virtuoso and simulated. Layout and post-layout simulations will be conducted to verify the circuit performance. The successful conclusion of this project may lead to an academic publication.

קורסי קדם:

768330301 אלקטרוניקה לינארית - חובה
768332501 מעבדה למעגלים אנלוגיים – חובה
8330801 מעגלים אלקטרוניים ספרתיים – חובה
83315 מעבדה מעגלים אלקטרוניים ספרתיים – חובה
768361101 מעגלים משולבים אנלוגיים – חובה

מקורות:

1. A. Feldman, O. Nechushtan and J. Shor, "Voltage Level Detection for Near-VTH Computing," in IEEE Journal of Solid-State Circuits, vol. 59, no. 6, pp. 1847-1857, June 2024, doi: 10.1109/JSSC.2023.3309865.
2. I. Lee, Y. Lee, D. Sylvester, and D. Blaauw, “Battery Voltage Supervisors for Miniature IoT Systems,” IEEE J. Solid-State Circuits, vol. 51, pp. 2743–2756, November 2016.
3. C. D. Roover and M. S. J. Steyart, “Energy Supply and ULP Detection Circuits for an RFID Localization System in 130 nm CMOS,” IEEE J. Solid-State Circuits, vol. 45, pp. 1273–1285, June 2010.