🏆 Best Student Paper Award for Jiantao Liu and Carmine Rizzi at IWLS 2026
In September 2026 in Hong Kong, the researchers Jiantao Liu and Carmine Rizzi, both PhD students in the Digital Systems and Design Automation (DYNAMO) group at ETH Zurich, won the “Best Student Paper Award” at the international conference International Workshop on Logic & Synthesis (IWLS). This recognition came in appreciation of their advanced research titled “GLOW: Glitch Optimization with Retiming for Low Power”, which addresses the topic of reducing power consumption in digital systems through advanced techniques in retiming and glitch reduction.
This article aims to explain the technical concepts behind the award-winning paper and highlight the importance of reducing power consumption in digital circuits and how it can be implemented with advanced methods within the field of electrical engineering.
📌 Key points summary:
- Introducing the concept of glitches in digital circuits and their effect on power consumption.
- The principles of retiming as a method to improve performance and reduce glitches.
- Mechanisms for applying optimizations to achieve lower power consumption in digital systems.
- The role of recent research in enhancing the effectiveness of digital design in terms of energy sustainability.
⚡ What are Glitches in Digital Systems?
In digital circuits that rely on signals switching between 0 and 1, incorrect or temporary signals sometimes occur, known as glitches. These signals are not correct results of the logical operation but appear temporarily when the circuit state changes due to timing differences in signal transitions between logic elements.
These glitches lead to increased power consumption without functional benefit, because they cause unnecessary activation of electronic switches inside the circuit, which results in additional energy dissipation.
🔹 Important point: Reducing or eliminating glitches is considered a fundamental step in low-power circuit design, especially in portable and embedded devices where energy efficiency is a priority.
🔧 Retiming as an Engineering Solution
Retiming is an engineering technique used to improve the arrangement of memory elements (such as flip-flops) within digital circuits with the goal of adjusting signal timing without changing the logical function. This technique allows improving the clock period and reducing the number of glitches resulting from timing differences in signal transitions.
By changing the locations of storage elements within the circuit, critical paths can be improved and the overlap of signals that causes glitches can be reduced, leading to lower power consumption and improved overall performance.
📌 Quick takeaway: Retiming does not affect the circuit’s logical outputs, but it redistributes signals in time within it to reduce temporary errors and delay times.
📊 Combining Glitch Optimization with Retiming – The GLOW Technique
In the honored research, an advanced technique called GLOW was proposed, which combines glitch optimization and retiming operations to achieve lower power consumption. This technique focuses on:
- Analyzing points where glitches appear inside synchronous circuits.
- Applying intelligent adjustments to the locations of flip-flop points so that their timing aligns with glitch reduction.
- Using advanced optimization algorithms that reduce the impact of these glitches on overall power consumption.
The result is circuits that consume less power while maintaining the same functional performance and speed, which is vital in the design of microprocessors and embedded control systems.
⚠️ Safety notice: When designing digital circuits that include retiming and power-reduction techniques, comprehensive testing must be observed to verify output integrity and compliance with the timing requirements of the systems.
🛡️ The Importance of Improving Power Quality in Digital Systems
In electrical engineering, power quality is one of the fundamental factors affecting the efficiency and continuity of system operation. The disturbances caused by glitches are not only a waste of energy, but may also affect the stability of current supply and cause operational problems.
In addition to adopting methods such as retiming, digital circuits can be equipped with a protection system that improves signal quality, reduces interference from annoying signals, and thus raises the efficiency of the system as a whole.
🔹 Important point: Power quality is not limited to current and voltage alone, but also includes digital signals and improving their stability to provide an optimal operating environment.
📐 Practical applications of digital power-consumption optimization techniques
The practical applications of these techniques include:
- Designing low-power microprocessors for laptops and smartphones.
- Automotive control systems, where energy efficiency is essential to increase the range of electric vehicles.
- Embedded devices used in the Internet of Things (IoT) that rely on long battery life.
- Solar power stations and energy storage systems that need precise, energy-efficient control circuits.
Following such techniques enhances sustainability and helps reduce energy loss across all engineering applications.
📌 Quick takeaway: Understanding and applying glitch optimization and retiming improvements is an essential skill for any electrical engineer interested in designing digital systems that are efficient in power consumption.
🔍 How can students and technicians benefit from this knowledge?
Students and technicians can follow developments in performance optimization and digital systems through practical steps such as:
- Studying the basics of digital circuit design, with a special understanding of timing and glitches.
- Using advanced electronic design tools to study the effect of retiming on circuit performance.
- Following recent scientific research in the fields of digital design automation and power-consumption analysis.
- Applying this understanding in practical projects, especially in the areas of portable devices and embedded systems.
This knowledge enhances design and operation skills and paves the way for new innovations in the field of electrical engineering.
⚡ Engineering tip: Do not view only reducing power consumption as an environmental goal, but as a challenge and a way to improve the reliability and stability of the digital systems on which modern technology is built.
Conclusion
Jiantao Liu and Carmine Rizzi receiving the “Best Student Paper Award” at IWLS 2026 highlights the importance of applied scientific research in the field of reducing power consumption in digital circuits. Techniques such as re-timing and glitch optimization represent vital technical tools for any electrical engineer interested in energy efficiency and power quality in modern systems.
For students and technicians, delving into these concepts and applying them during learning and hands-on training stages forms a solid foundation for understanding and innovation in digital and electrical engineering in general.
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