We propose and implement a four-phase handshake protocol for bundled-data asynchronous circuits with consideration given to power consumption and area. A key aspect is that our protocol uses three phases for generating the matched delay to signal the completion of the data-path stage operation whereas conventional methods use only one phase. A comparison with other protocols at 0.18 µm process showed that our protocol realized lower power consumption than any other protocol at cycle times of 1.2 ns or more. The area of the delay generator required for a given data-path delay was less than half that of other protocols. The overhead of the timing generator was the same as or less than that of other protocols.
We present and evaluate a next generation learning technology that uses a 3D polarized light system. We first present the system structure of the learning system using 3D systems and describing how the system was developed from digital elevation map (DEM) data. Next, we test the system by providing content so users can view 3D geography, learning directly from 3D data. Finally, we evaluate our system and discuss its advantages.
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