Welcome to the GREEN IC group homepage
(Green Resilient Energy Efficient Nanoscale Integrated Circuits )

Welcome to our homepage! We hope you enjoy the contents and find it interesting.
The group is lead by Prof. Massimo Alioto, and involves amazing people who are passionate about integrated circuit technology and its impact on the life of (many) people. Energy efficiency is the focal point of our activity, as its improvement can bring large benefits to our environment and drive the evolution of everyday electronic objects through their form factor and battery lifetime (e.g., mobile systems, Internet of Things).
Below there is a short description of our interests, location, vision and mission. Please, contact Prof. Massimo Alioto for further information.

The Green IC group aims to develop cutting-edge research on extremely energy-efficient integrated circuits for high-performance, mobile and ubiquitous micro and nano systems. The group focuses on four fundamental energy-centric research thrusts:

• energy-autonomous systems and wireless sensors with nearly perpetual operation (including ultra-low power analog interfaces, digital processing, power management), for biomedical applications, distributed surveillance, smart cities, smart buildings, structural monitoring, smart cameras, and many others
• error-resilient near-threshold VLSI circuits and systems for 10X improvement in energy efficiency for mobile applications (both error-free and error-aware computing are of interest)
• circuit- to system-level techniques to enhance the energy efficiency of high-speed VLSI circuits to enable continued performance enhancements under a tight power budget
• circuit and system integration with emerging and post-CMOS technologies for green computing.

The Green IC group is part of the ECE department of the National University of Singapore (NUS), a leading global university centered in Asia. According to QS World University Rankings by Subject, in 2014 NUS is ranked 6th worldwide in Electrical & Electronic Engineering for academic reputation (it was 7th in 2013).
It is located in the heart of Singapore, geographic and technology focal point in Asia, with a well world-renowned technology ecosystem and fast-growing economy.
Key drivers of economy are semiconductors, electronic circuit design/manufacturing and the bio-medical sector.


Improve our quality of life and reduce our environmental impact by introducing innovative and creative integrated circuit solutions with dramatically improved energy efficiency, reduced form factor, extended lifetime and lower cost.
The ultimate goal is to enable the delivery of massive / accurate / secure / personalized information, and a finer control of our environment and our body, which is pursued by tackling only the very important challenges and nurturing self-criticism to constantly strive for excellence.
The number of people who can have access and benefit from such technologies is the measure of our success.

Energy efficiency is the common denominator in the challenges of improving quality of life and reducing environmental impact through the diffusion of low-cost electronic systems whose usage does not interfere with their surroundings (spatially thanks to their extreme compactness, temporally thanks to their energy autonomy).

We believe that dramatic improvements energy efficiency can be obtained through few clean principles, which we explore in many different ways:
  • electronics is going towards increasingly complex systems: meaningful circuit solutions need to fit a system concept first
  • energy efficiency comes from synergy: working cooperatively across levels of abstraction leads to benefits that are largely greater than the sum of the single benefits
  • energy is a valuable currency, and needs to be continuously traded off with other available commodities (performance/data rate, error rate/signal quality, resolution...)
  • energy needs to be truly scalable across voltage and time-varying specifications: every time we can give up something, energy needs to benefit from it
  • emerging technologies are a tremendous source of inspiration to look at the future, and to learn new ways to use what exists
  • understanding or at least measuring are powerful tools to increase energy efficiency by avoiding pessimism and reducing design margin
  • failures are part of our life, as well as of electronics systems: dealing with them nicely is certainly more effective than just ignoring them.
The above general principles inspire our thinking and are being extensively applied in our research to come up with creative solutions to the challenge of improving energy efficiency by the next 10X.
As an attempt to link the above principles with pragmatic circuit design directions under the perspective of voltage scaling, you might be interested in checking the following overviews / editorials by Prof. Alioto:
- IEEE TCAS-II Editorial for the special issue on "Ultra-Low Voltage VLSI Circuits and Systems for Green Computing"
- IEEE TCAS-I overview paper opening the 2012 Editorial Year.


  • Green IC group featured in TSMC 2020 report The Green IC group has been featured in the TSMC 2020 report among the ten technological highlights, and key academic collaborators.The innovation mentioned in the TSMC report is related ...
    Posted Jul 20, 2021, 11:21 PM by Green IC group ‎(www.green-ic.org)‎
  • New Springer book: world's first on reconfigurable microarchitectures for wide energy scaling The book "Adaptive Digital Circuits for Power-Performance Range beyond Wide Voltage Scaling" is being published by Springer and is now available athttps://www.springer.com/gp/book/9783030387952 ...
    Posted Jan 30, 2020, 3:15 PM by Green IC group ‎(www.green-ic.org)‎
  • MEAD course on "Energy-constrained integrated systems" organized by Prof. Alioto and Prof. Alarcon (UPC) - Asia's first! The new course will be held from Dec. 10 to Dec 14, 2018 in Singapore at NUS.The flyer and the detailed schedule are attached below. Detailed information and the ...
    Posted Sep 26, 2018, 4:56 AM by Green IC group ‎(www.green-ic.org)‎
  • Talk by Prof. Makoto Nagata (Kobe University - Japan) - 21 September 2018 Prof. Makoto Nagata (Kobe University - Japan) will give an exciting talk on "Deployment of EMC-Compliant IC Chip Techniques in Design for Hardware Security". The talk will take place on ...
    Posted Sep 18, 2018, 6:52 PM by Green IC group ‎(www.green-ic.org)‎
  • Seminar by Prof. Alberto Sangiovanni-Vincentelli (UCBerkeley) - May 17, 2018 Prof. Alberto Sangiovanni-Vincentelli (University of California, Berkeley) will give a talk on "LET'S GET PHYSICAL: ADDING PHYSICAL DIMENSIONS TO CYBER SYSTEMS". The talk will take place on May ...
    Posted May 10, 2018, 3:44 AM by Green IC group ‎(www.green-ic.org)‎
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