1. Background of the Research and Development and its Target
Recent spread of mobile consumer electronics has rapidly increased amount of data handled by digital devices. On the other hand, reduction in their power consumption and circuit area is required more than ever since digital equipments have constraints in lasting-hour of batteries and limited internal space to achieve their electronic systems.
Data communication of mobile device, for instance in touch panel operation, has switching behavior of data transmission that consists of burst-mode and stand-by mode. So mobile applications significantly require not only low power consumption and high-speed performance in operation, but also low stand-by power consumption and fast data link recovery time.
In order to solve these constraints, THine, collaborating with the
THine has achieved the breakthrough using all-digital circuits in order to overcome the assumed limitation of analog circuit technology in the future since the recent LSI manufacturing process generally uses as low level voltage as 1 V.
2. Achievement through the joint research
THine’s achievement with the
(1) the proposed burst-mode CDR circuit realizes true 4-cycle lock without any warm-up operations after power-on in frequency range from 1.40 to 2.06 Gb/s,
(2) the new architecture utilizes a phase generator with embedded time-to-digital converter (TDC) to detect a frequency and to recover a correct clock phase, while general CDR requires additional
(3) the developed circuits suppress increase of circuit area by the coarse-fine hierarchical architecture of
In this joint research activity, THine has led the technical concept and developed evaluation and application technology while the
3. Anticipated application area
The achievement, potentially, can be applied to broad application markets with burst-mode in high-speed data communication, for instance, mobile devices, sensor network usages, and industrial equipments with time-sharing reciprocal data communication. Many future applications are expected to have their solution in lower power consumption, higher-speed, smaller footprints, and long lasting battery operations by adopting these achievements.
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