The static induction thyristor ( SIT , SITh ) is a thyristor with a buried gate structure in which the gate electrodes are placed in n-base region. Since they are normally on-state, gate electrodes must be negatively or anode biased to hold off-state. It has low noise, low distortion, high audio frequency power capability. The turn-on and turn-off times are very short, typically 0.25 microseconds.
10-407: The first static induction thyristor was invented by Japanese engineer Jun-ichi Nishizawa in 1975. It was capable of conducting large currents with a low forward bias and had a small turn-off time. It had a self controlled gate turn-off thyristor that was commercially available through Tokyo Electric Co. (now Toyo Engineering Corporation ) in 1988. The initial device consisted of a p+nn+ diode and
20-612: A buried p+ grid. In 1999, an analytical model of the SITh was developed for the PSPICE circuit simulator. In 2010, a newer version of SITh was developed by Zhang Caizhen, Wang Yongshun, Liu Chunjuan and Wang Zaixing, the new feature of which was its high forward blocking voltage. This electronics-related article is a stub . You can help Misplaced Pages by expanding it . Jun-ichi Nishizawa Jun-ichi Nishizawa ( 西澤 潤一 , Nishizawa Jun'ichi , September 12, 1926 – October 21, 2018)
30-419: A career of meritorious achievement in electrical science, electrical engineering, or the electrical arts." It is the oldest medal in this field of engineering. The award consists of a gold medal, bronze replica, certificate, and honorarium. The medal may only be awarded to a new leap/breakthrough in the technological area of science. The Edison Medal, named after the inventor and entrepreneur Thomas Edison ,
40-459: A year before Schawlow and Townes's first paper on optical masers. While working at Tohoku University , he proposed fiber-optic communication , the use of optical fibers for optical communication , in 1963. Nishizawa invented other technologies in the 1960s that contributed to the development of optical fiber communications, such as the graded-index optical fiber as a channel for transmitting light from semiconductor lasers. He patented
50-762: The Honda Prize and the Laudise Prize of the International Organization for Crystal Growth (1989). IEEE conferred the Edison Medal on him in 2000, and introduced the IEEE Jun-ichi Nishizawa Medal in 2002. He has more than a thousand patents registered under his name. Edison Medal The IEEE Edison Medal is presented by the Institute of Electrical and Electronics Engineers (IEEE) "for
60-746: The graded-index optical fiber in 1964. In 1971, he invented the static induction thyristor . Nishizawa was a Life Fellow of the IEEE . He is a Fellow of several other institutions, including the Physical Society , the Russian Academy of Sciences , and the Polish Academy of Sciences . Nishizawa was decorated with Order of Culture by the emperor of Japan in 1989. He also received the Japan Academy Prize (1974), IEEE Jack A. Morton Award (1983),
70-415: The president of Iwate Prefectural University in 1998. In 1950, the static induction transistor was invented by Jun-ichi Nishizawa and Y. Watanabe. The PIN photodiode was also invented by Nishizawa and his colleagues in 1950. In 1952, he invented the avalanche photodiode . He then invented a solid-state maser in 1955. This was followed by his proposal for a semiconductor optical maser in 1957,
80-516: Was a Japanese engineer and inventor. He is known for his electronic inventions since the 1950s, including the PIN diode , static induction transistor , static induction thyristor , SIT/SITh . His inventions contributed to the development of internet technology and the Information Age . He was a professor at Sophia University . He is considered the "Father of Japanese Microelectronics". Nishizawa
90-572: Was born in Sendai , Japan, on September 12, 1926. He earned a B.S. in 1948, and a Doctor of Engineering degree in 1960, from Tohoku University . In 1953, he joined the Research Institute of Electrical Communication at Tohoku University. He became a professor there and was appointed director to two research institutes. From 1990 to 1996, Nishizawa served as the President of Tohoku University. He became
100-634: Was created on 11 February 1904 by a group of Edison's friends and associates. Four years later the American Institute of Electrical Engineers (AIEE) entered into an agreement with the group to present the medal as its highest award. The first medal was presented in 1909 to Elihu Thomson . Other recipients of the Edison Medal include George Westinghouse , Alexander Graham Bell , Nikola Tesla , Michael I. Pupin , Robert A. Millikan (Nobel Prize 1923), and Vannevar Bush . A complete and authoritative list
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