We gave a 3 hour tutorial at IEEE Int Conference on Electronics Circuits and Systems (ICECS’16) in Monaco on the 11th December 2016.
The handout can be downloaded from here:
We also organised a special session on Oscillator Based Computing:
where one of our papers was presented:
Last week there was an inaugural ARM Research Summit.
I gave a talk on Power & Compute Codesign for “Little Digital” Electronics.
Here are the slides of this talk:
Here is the abstract of my talk:
Power and Compute Codesign for “Little Digital” Electronics
Alex Yakovlev, Newcastle University
The discipline of electronics and computing system design has traditionally separated power management (regulation, delivery, distribution) from data-processing (computation, storage, communication, user interface). Power control has always been a prerogative of power engineers who designed power supplies for loads that were typically defined in a relatively crude way.
In this talk, we take a different stance and address upcoming electronics systems (e.g. Internet of Things nodes) more holistically. Such systems are miniaturised to the level that both power management and data-processing are virtually inseparable in terms of their functionality and resources, and the latter are getting scarce. Increasingly, both elements share the same die, and the control of power supply, or what we call here a “little digital” organ, also shares the same silicon fabric as the power supply. At present, there are no systematic methods or tools for designing “little digital” that could ensure that it performs its duties correctly and efficiently. The talk will explore the main issues involved in formulating the problem of and automating the design of little digital circuits, such as models of control circuits and the controlled plants, definition and description of control laws and optimisation criteria, characterisation of correctness and efficiency, and applications such as biomedical implants, IoT ‘things’ and WSN nodes.
Our particular focus in this talk will be on power-data convergence and ways of designing energy-modulated systems . In such systems, the incoming flow of energy will largely determine the levels of switching activity, including data processing – this is fundamentally different from the conventional forms where the energy aspect simply acts as a cost function for optimal design or run-time performance.
We will soon be asking ourselves questions like these: For a given silicon area and given data processing functions, what is the best way to allocate silicon to power and computational elements? More specifically, for a given energy supply rate and given computation demands, which of the following system designs would be better? One that involves a capacitor network for storing energy, and investing energy into charging and discharging flying capacitors through computational electronics which would be able to sustain high fluctuations of the Vcc (e.g. built using self-timed circuit). The other one that involves a switched capacitor converter to supply power as a reasonably stable Vcc (could be a set of levels). In this latter case, it would be necessary also to invest some energy into powering control for the voltage regulator. In order to decide between these two organisations, one would need to carefully model both designs and characterise them in terms of energy utilisation and delivery of performance for the given computation demands. At present, there are no good ways for co-optimising power and computational electronics.
Research in this direction is in its infancy and this is only a tip of the iceberg. This talk will shed some light on how we are approaching the problem of power-data co-design at Newcastle, in a series of research projects producing novel types of sensors, ADCs, asynchronous controllers for power regulation, and software tools for designing “little digital” electronics.
 A. Yakovlev. Energy modulated computing. Proceedings of DATE, 2011, Grenoble, doi: 10.1109/DATE.2011.5763216
I took part in a Panel on Bio-inspired Electronic Design Principles at the
Here are my slides
The quick summary of these ideas is here:
Summary of ideas for discussion from Alex Yakovlev, Newcastle University
With my 30 years of experience in designing and automating the design of self-timed (aka asynchronous) systems, I have been involved in studying and exploiting in practice the following characteristics of electronic systems: inherent concurrency, event-driven and causality-based processing, parametric variation resilience, close-loop timing error avoidance and correction, energy-proportionality, digital and mixed-signal interfaces. More recently, I have been looking at new bio-inspired paradigms such as energy-modulated and power-adaptive computing, significance-driven approximate computing, real-power (to match real-time!) computing, computing with survival instincts, computing with central and peripheral powering and timing, power layering in systems architecting, exploiting burstiness and regularity of processing etc.
In most of these the central role belongs to the notion of energy flow as a key driving force in the new generation of microelectronics. I will therefore be approaching most of the Questions raised for the Panel from the energy flow perspective. The other strong aspect I want to address that acts as a drive for innovation in electronics is a combination of technological and economic factors, which is closely related to survival, both in the sense of longevity of a particular system as well as survival of design patterns and IPs as a longevity of the system as a kind or as a system design process.
My main tenets in this discussion are:
- Compute where energy naturally flows.
- Evolve (IPs, Designs) where biology (or nature as a whole) would evolve its parts (DNA, cells, cellular networks, organs).
I will also pose as one of the biggest challenges for semiconductor system the challenge of massive informational connectivity of parts at all levels of hierarchy, this is something that I hypothesize can only be addressed in hybrid cell-microelectronic systems. Information (and hence, data processing) flows should be commensurate to energy flows, only then we will be close to thermodynamic limits.
An update of Workcraft has been released on:
It contains some new capabilities.
The website also contains a significantly modified tutorial and exercises.
Last Month we gave a short Course
“Self-timed circuit design: from enigma to reality” at the IMEC Academy
If you need any information or materials please contact me directly.
We are giving an Advanced Tutorial: Modeling, Synthesis and Verification of Hardware on Tuesday 23rd June at the Petri nets 2015 Conference in Brussels.
The agenda of the tutorial and directions to the venue can be found here:
Everyone is welcome!
We gave two talks on our papers accepted for ASYNC 2015:
- Design and Verification of Speed-Independent Multiphase Buck Controller [ Slides]
Danil Sokolov, Victor Khomenko, Andrey Mokhov, Alex Yakovlev, and David Lloyd
- Opportunistic Merge Element [ Slides ]
Andrey Mokhov, Victor Khomenko, Danil Sokolov, and Alex Yakovlev
Both emerged from our project A4A (Async for Analogue)
A nice and relevant message on Seth’s blog:
not forgetting to invest in resilience is what I keep reminding in my twits.
I gave a talk “Putting Microelectronics Design on a Strict Diet” at the Energy Theme seminar today. The slides can be found here: