Tohoku Univ. Technology：A Nonvolatile Register with a Differential Information Storing Scheme：T24-080
Reduction in power consumption and area with conventional level of short operating time
Intermittent computing enables continuous processing under unstable energy supply. In edge device implementation, a nonvolatile logic circuit using nonvolatile registers is promising as it retains internal state with only local data transfers. Conventional nonvolatile registers, composed of multiple 1-bit memory circuits (NV-FFs), require two MTJ devices per bit, leading to high area and energy overhead. The reference-load sharing scheme (RLSS) was proposed to solve this issue, however, a new issue arose as the required operation time increased in proportion to the number of register bits. This invention introduces a differential information storage scheme (DISS), which stores 1-bit data via resistance differences between adjacent MTJ devices. This allows two-cycle backup and restore, reducing energy and area while maintaining conventional operation speed, as confirmed by simulations.
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The revenue generated from technology transfer is reinvested into universities and researchers as new research funding, which is used to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will actively promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by concluding basic technology transfer agreements with the following universities (as of June 1, 2025): - Tohoku University - Hirosaki University - Iwate University - Akita University - Fukushima University - Yamagata University - Tohoku Gakuin University - Iwate Medical University - Fukushima Medical University - Aizu University - Miyagi University - Hokkaido University - Muroran Institute of Technology - Showa Medical University
