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Low-Power Integrated Circuit Design Lab
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The lab designs circuits that run on picowatts to sense the human body and society.
AboutAbout the lab
Making integrated circuits work at extremely low power.
The Low-Power Integrated Circuit Design Lab (Niitsu Lab) studies the foundational technologies for designing energy-efficient, large-scale integrated circuits, as well as the applied technologies built on them.
The lab also works on semiconductor integrated circuit systems for biomedical applications and for Beyond 5G/6G wireless communication.
Together with the Sato Lab and the Hashimoto Lab, it forms the Integrated Systems Engineering Division of the Graduate School of Informatics.
Key terms
- Integrated circuit
- An electronic circuit that packs many transistors onto a small silicon plate. Also called an LSI.
- PUF
- A circuit that uses tiny variations from manufacturing to extract a value unique to each chip, like a "fingerprint".
- ISFET
- A transistor-type sensor that converts the concentration of ions in a solution (such as pH) into an electrical signal.
ResearchResearch themes
In recent work with Prof. Niitsu as the last author, the lab has been working on picowatt-class ultra-low-power sensing circuits, circuits that extract a chip's fingerprint, circuits that directly digitize the supply voltage, and applications to dental care.
*Illustrative imageSensing circuits that run on picowatts
The lab designs integrated circuits that measure temperature and pH, and readout circuits for ISFETs that measure ion concentration, so that they operate on very small, picowatt-class power.
*Illustrative imageCircuits that extract a chip's fingerprint
The lab studies circuits that implement a PUF, which uses manufacturing variation to extract a value unique to each chip, in a reconfigurable form that extracts many bits stably (presented at ISSCC 2026).
*Illustrative imageDigitizing the supply voltage directly
The lab designs a converter circuit that converts the supply voltage directly into a digital value using picowatt-class power, and verifies it on actual chips.
*Illustrative imageDentures as wearable devices
The lab also studies the communication environment when removable dentures are used as wearable devices.
MembersFaculty
The faculty members of the Low-Power Integrated Circuit Design Lab are Professor Kiichi Niitsu and Assistant Professor Kunyang Liu.
- ProfessorKiichi Niitsu
- Assistant ProfessorKunyang Liu
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Mpw4-top-HD” Zeptobars; Mikhail Svarichevsky / CC BY 3.0 (cropped)
- Sensing circuits that run on picowatts: “PH-zond for gastroenterology” Miheev / Public domain (cropped)
- Circuits that extract a chip's fingerprint: “NXP PCF8574 Closeup ( )” Cole L / CC BY-SA 2.0 (cropped)
- Digitizing the supply voltage directly: “Digital Oscilloscope” Mikasa2025 / CC BY 4.0 (cropped)
- Dentures as wearable devices: “Prettau Bridge - (TLZ-IB)” Roedentallab / CC BY-SA 3.0 (cropped)
- Related lab (Semiconductor Physics and Engineering Lab): “Rounded Silicon Carbide Ingot” LaMèreVeille / CC BY-SA 4.0 (cropped)
- Related lab (Information Circuit Architecture Lab): “Micro-chips wafer (25079)” Syced / CC0 (cropped)
- Related lab (Intelligent Circuit Design Lab): “Close-up of a VHS Player Circuit Board 2” DiscoA340 / CC0 (cropped)
- Related lab (Integrated Computing Lab): “286 AT motherboard” Mister rf / CC BY-SA 4.0 (cropped)
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