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Sugahara Lab
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The lab researches integrated circuits that cut wasted standby power and technology that generates electricity from body heat.
AboutAbout the lab
Building integrated circuits that waste no energy.
Sugahara Lab studies integrated circuit technology known as VLSI.
The lab develops low-energy CMOS technology, centered on memory technology, for use in microprocessors, wearable devices, and more.
It also works on transistors based on new operating principles that could benefit future high-performance integrated circuits, and on thermoelectric generation technology that produces electricity from body heat.
Key terms
- VLSI
- A large-scale integrated circuit that puts a very large number of transistors on a single chip
- CMOS
- A circuit design approach that combines two types of transistors with different characteristics to operate with low power
- Power gating
- A method of reducing the power consumed during standby by turning off power to blocks of circuitry that are not in use
NewsLab news
Paper on a noise-robust ultra-low-voltage retention SRAM published in IEEE OJCAS
Developed a neural network accelerator that operates at the minimum energy point
Master's student wins the IMFEDK Student Paper Award
ResearchResearch themes
The lab researches and develops low-energy CMOS technology, centered on memory technology, for high-performance logic systems and for low-voltage logic systems such as wearable devices. It also studies transistors based on new operating principles and thermoelectric generation technology that produces electricity from the heat of the human body.
*Illustrative imageReducing standby power with nonvolatile memory
The lab aims to realize CMOS logic systems that reduce wasted power during standby by combining CMOS circuits with memory circuits that retain data even when power is turned off, using power gating.
*Illustrative imagePseudo-nonvolatile memory circuits
The lab proposes a memory circuit built only from CMOS that retains data using the very small voltage that remains when power is turned off. It is expected to reduce standby power by an amount comparable to nonvolatile memory.
*Illustrative imageThin-film modules that generate power from body heat
The lab studies thermoelectric generation modules that use body heat and can serve as a power source for wearable devices. It proposes a new type made with integrated circuit microfabrication technology and investigates its optimal design and performance.
*Illustrative imageTransistors based on new operating principles
The lab studies spin MOSFETs, which can store information using spin, and piezoelectronic transistors (PETs), which may be able to pass large currents at very low voltages.
MembersFaculty
Sugahara Lab members consist of faculty, postdoctoral researchers, and master's and undergraduate students.As of 2025
- Associate ProfessorSatoshi SugaharaPublications ↗
- Project LecturerShuu'Ichirou YamamotoPublications ↗
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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: “Silicon Village ( )” Jack Spades / CC BY 2.0 (cropped)
- Reducing standby power with nonvolatile memory: “Mikron-16m-90nm-SRAM” ZeptoBars / CC BY 3.0 (cropped)
- Pseudo-nonvolatile memory circuits: “Mpu6050-sram” ZeptoBars / CC BY 3.0 (cropped)
- Thin-film modules that generate power from body heat: “Монокристалл теллурида висмута” Original uploader was User:333 in ru-wikipedia / Public domain (cropped)
- Transistors based on new operating principles: “2N140 PNP Germanium Alloy Junction Transistor closeup” John Maushammer / CC BY 4.0 (cropped)
- Related lab (Kawabe Lab): “Wind Turbines ^ Solar Panels at Upper Holton Wind ^ Solar Farm - geograph.org.uk - 4618332” Geographer / CC BY-SA 2.0 (cropped)
- Related lab (Miyajima Lab): “Perovskite solar cell” Dennis Schroeder / National Renewable Energy Laboratory / Public domain (cropped)
- Related lab (Nishiyama Lab): “Laser diode chip” NASA
（PD NASA。 作者欄なし） / Public domain (cropped) - Related lab (Iino Lab): “Nematic liquid crystal” Ingo Dierking / CC BY-SA 4.0 (cropped)
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