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A Design and Verification of an Efficient Control Unit for Optical Processor  

Lee Won-Joo (Department of Internet Programming, Doowon technical College)
Publication Information
Journal of the Institute of Electronics Engineers of Korea CI / v.43, no.4, 2006 , pp. 23-30 More about this Journal
Abstract
This paper presents design andd verification of a circuit that improves the control-operation problems of Stored Program Optical Computer (SPOC), which is an optical computer using $LiNbO_3$ optical switching element. Since the memory of SPOC takes the Delay Line Memory (DLM) architecture and instructions that are needless of operands should go though memory access stages, SPOC memory have problems; it takes immoderate access time and unnecessary operations are executed in Arithmetic Logical Unit (ALU) because desired operations can't be selectively executed. In this paper, improvement on circuit has been achieved by removing the memory access of instructions that are needless of operands by decoding instructions before locating operand. Unnecessary operations have been reduced by sending operands to some specific operational units, not to all the operational units in ALD. We show that total execution time of a program is minimized by using the Dual Instruction Register(DIR) architecture.
Keywords
$LiNbO_3$ (Lithium Niobate); SPOC(Stored Program Optical Computer); DLM (Delay Line Memory); DIR (Dual Instruction Register);
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Times Cited By KSCI : 1  (Citation Analysis)
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