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One of the top integrated circuit authorities of Korea
Prof. Lee Gang-yoon of Integrated Circuits Lab at Sungkyunkwan University

Marching forward beyond technological limitations
The advent of smart phone is driving us to a wholly different level of what we have ever imagined the world to be. Smart phones are already loaded with cutting edge technologies such as blue tooth, voice recognition and waterproof. And the technology recently pushed it further to the level of iris recognition that allows the user to access the smart phone or the banking platform not to mention that the wireless charging technology has already come into practice. It might worth praising, in this respect, that the Sungkyunkwan University Integrated Circuits Lab, led by the professor Lee Gang-yoon, listed its name in the ‘100 Excellent National R&D Results 2016’ conducted by the Ministry of Science, ICT and Future Planning. Lee in particular is specialized in the wireless charging technology. He developed the ‘boosting charge loaded wireless charging-transmission/reception chips’ that satisfy the international triple modes (A4WP, WPC, PMA). In recognition, he received a citation and a certificate from the government. According to Lee, there are two types of wireless charging technology: ‘magnetic induction’ and ‘magnetic resonance’. The former is the one we are familiar with of putting the smart phone on the coil-loaded charger. It has drawbacks, though, that 2cm apart from the charger cuts the power transmission and the wrong position also drops the efficiency. The latter, on the other hand, cover up to 1 meter distance yet the efficiency and stability issues make the technology difficult to be commercialized. Taking the initiative by connecting ‘inductor’ to ‘capacity’ in parallel circuit, Lee and his team succeeded creating ‘magnetic resonance’ that delivers the maximum energy to a certain frequency even the distance is 1 meter apart. And it satisfies the triple international modes A4WP, WPC and PMA. “Based on what we have achieved so far, we currently are focusing on development of small reception IC (Integrated Circuit) that can be installed in smart phone, laptop and tablet. It means that we might succeed in localizing the existing imported wireless charge semiconductor and it can strengthen the competitiveness of Made in Korea when succeeded” says Lee. There also is possibility that it could be used for in-body medical equipment and it could open ‘the age of charging everywhere’, according to Lee. 

Securing original technology and talented manpower
If one’s ability is important to make contributions to the advancement of society, promoting talented young students is equally so. Lee has been exerting his effort in fostering talented manpower equipped with extensive knowledge and practical ability in a variety of circuits by making the most of the Integrated Circuits Lab at Sungkyunkwan University. Also, Lee actively used the accumulated knowhow and experience of the industry-university cooperation that realizes the commercialization of the technology more efficiently. “Research itself doesn’t bring substantial results but the practice and the realization through designing and making. This is very important as one stage must lead to stage higher and so on until we draw a final result.” Previously, Lee carried out a number of state-run research projects including ‘portable dual band multi-mode interactive wireless charging technology’ and ‘wireless charging device for smart phone and wearable’. Research on ‘low-power and low-noise transmitter and receiver’ and ‘sensor module ASIC’, that detects temperature and pressure of vehicles and provides network communication function, also have been an important part of his research. As for the future prospect, Lee says “Securing original technology in analogue and power semiconductor circuits is an important field that needs a national-level support while fostering talented manpower is equally so.” And the team of Integrated Circuits Lab at Sungkyunkwan University is highly determined to draw maximum results in the ‘low-power/high efficiency IC’, ‘ultra-low power RF transmitter and receiver’, ‘bio-related ultra-low power circuits’ and ‘highly stable circuit for smart phones. <Power Korea> sends a message of support. 


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