The Electronic Circuit Composition and Structure of String for a Novel Braid Electronics-Systems by Kumihimo Structure
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The Electronic Circuit Composition and Structure of String for a Novel Braid Electronics-Systems by Kumihimo Structure Shigekazu Kuniyoshi and Kuniaki Tanaka Chiba University, Department of Electronics & Mechanical Engineering Yayoi-cho, Chiba, 263-8522, Japan ABSTRACT The new integrated circuit concept that forms electronic equipment by the textile structure using the flexible fiber that has equipped the field effect transistor, the light emitting diode, the wiring pattern, etc. was proposed [1,2]. In this report, the structure of the filamentous body as a basic structure of the kumihimo with various electronic functions was examined. There are many kinds of one in the kumihimo by the number and how to unite the plaited thread used. Although such a highly efficient kumihimo-structure electronic integrated circuit can be realized using kumihimo with much thread, it becomes that much complicated. In order to simplify an argument here, square-type kumihimo that uses eight plaited threads is employed, and a basic logical circuit composition and the element arrangement on plaited thread are examined. Eight plaited-threads are divided into two groups that have four threads respectively, and they exist in the plane that intersected perpendicularly mutually. However, kumihimo is a 1-dimensional system fundamentally, it can be extended in the length direction if necessary, and it is considered that a quite complicated function is also realizable for a circuit with few input and output. Here, plaited thread that belongs to one group for convenience will be called warp and the other group will be called woof. The circuit composition and a concrete structure of threads for kumihimo are discussed. INTRODUCTION The possibility of the electronic equipment by the kumihimo structure that made the thread equipped with electron devices, such as a field effect transistor, or the electrode pattern for wiring was examined. The threads that form kumihimo are located up and down alternately. The portion where warp and the woof intersect in kumihimo structure is used as electric connection. The connection part that adjoined each other along with warp or the woof has the relation of the front reverse side. In consideration of the flexibility of circuit composition, the field effect transistor and the electrode pattern for wiring which are formed on a pillar-like fiber has been arranged symmetrically with the front reverse side. Moreover, in order to simplify circuit composition, an active element, such as a field effect transistor, the electrodes pattern for wiring, and the pads for connection were formed in warp, and the electrodes pattern for wiring and the pad for connection were formed on the woof here. The 2 inputs NAND circuit and 2-inverters were adopted as a basic circuit, and it decided to compound various logic circuits using these two basic circuits. Moreover,
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the solar cell is used in order to supply electric power to a basic unit. In order to realize various circuits by the combination of basic circuits, when
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