| Lane of parallel through carry in ternary optical adder |
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| 作者姓名： | JIN Yi HE Huacan & Al Lirong School of Computer Engineering and Science Shanghai University Shanghai China College of Computer Science & Engineering Northwestern Polytechnical University Xi'an China |
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| 作者单位： | JIN Yi，HE Huacan & Al Lirong School of Computer Engineering and Science，Shanghai University，Shanghai 200072，China; College of Computer Science & Engineering，Northwestern Polytechnical University，Xi'an 710072，China |
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| 基金项目： | 国家"211"工程建设项目 |
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| 摘 要： | At the present 50 to 100 microseconds are necessary for a liquid crystal to change its state from opacity to clarity; 1.14×10-5 microseconds are however proved to be enough for light to pass through a clarity liquid crystal device. Rooted from this great difference in time, an optical adder was constructed with parallel through carry lanes (PTCL) composed of liquid crystals. Because all carries in PTCL process in parallel, the carry delay in the ternary optical computer's adder is avoided. Eliminating the carry delay in adder of ternary optical computer by physical means, the PTCL is also applicable for other types of optical adders. Moreover a light diagram of the adder and one PTCL structure are provided.
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Lane of parallel through carry in ternary optical adder |
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| JIN Yi,HE Huacan & Al Lirong School of Computer Engineering and Science,Shanghai University,Shanghai ,China, College of Computer Science & Engineering,Northwestern Polytechnical University,Xi''''an ,China.Lane of parallel through carry in ternary optical adder[J].Science in China(Information Sciences),2005,48(1):107-116. |
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| Authors: | Email author" target="_blank">Jin?Yi?Email author He?Huacan Ai?Lirong |
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| Affiliation: | 1. School of Computer Engineering and Science, Shanghai University, Shanghai 200072, China;College of Computer Science & Engineering, Northwestern Polytechnical University, Xi'an 710072, China
2. College of Computer Science & Engineering, Northwestern Polytechnical University, Xi'an 710072, China |
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| Abstract: | At the present 50 to 100 microseconds are necessary for a liquid crystal to change its state from opacity to clarity; 1.14
× 10−5 microseconds are however proved to be enough for light to pass through a clarity liquid crystal device. Rooted from this
great difference in time, an optical adder was constructed with parallel through carry lanes (PTCL) composed of liquid crystals.
Because all carries in PTCL process in parallel, the carry delay in the ternary optical computer’s adder is avoided. Eliminating
the carry delay in adder of ternary optical computer by physical means, the PTCL is also applicable for other types of optical
adders. Moreover a light diagram of the adder and one PTCL structure are provided. |
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| Keywords: | optical computer ternary adder through carry lane |
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