The static induction thyristor (SIT, SITh) is a
thyristor
A thyristor () is a solid-state semiconductor device with four layers of alternating P- and N-type materials used for high-power applications. It acts exclusively as a bistable switch (or a latch), conducting when the gate receives a current ...
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.
History
The first static induction thyristor was invented by Japanese engineer
Jun-ichi Nishizawa
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 in ...
in 1975. It was capable of conducting large currents with a low
forward bias
Forward is a relative direction, the opposite of backward.
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and had a small turn-off time. It had a self controlled
gate turn-off thyristor
A gate turn-off thyristor (GTO) is a special type of thyristor, which is a high-power (.e.g. 1200V AC) semiconductor device. It was invented by General Electric. GTOs, as opposed to normal thyristors, are fully controllable switches which can be ...
that was commercially available through Tokyo Electric Co. (now
Toyo Engineering Corporation
is a Japanese engineering, procurement and construction company serving mainly the hydrocarbons (oil and natural gas) and petrochemical sectors worldwide.
It was established in 1961. Its various business include R&D collaboration, design, engine ...
) in 1988. The initial device consisted of a p+nn+ diode and a buried p+ grid.
In 1999, an analytical model of the SITh was developed for the
PSPICE
OrCAD Systems Corporation was a software company that made OrCAD, a proprietary software tool suite used primarily for electronic design automation (EDA). The software is used mainly by electronic design engineers and electronic technicians to ...
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.
See also
*
Static induction transistor
The static induction transistor (SIT) is a type of field-effect transistor (FET) capable of high-speed and high-power operation, with low distortion and low noise. It is a vertical structure device with short multichannel. The device was original ...
*
MOS composite static induction thyristor
MOS composite static induction thyristor (CSMT or MCS) is a combination of a MOS transistor connected in cascode relation to the SI-thyristor.
The SI thyristor (SITh) unit has a gate to which a source of MOS transistor is connected through a volt ...
References
External links
Static induction thyristor
Semiconductor devices
Solid state switches
Power electronics
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