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In our daily work and life, we use electronic machinery very frequently, but
how much do we know about the field effect tube, which is very common in
machinery? Let me introduce it to you.
In today's life, field effect tubes are used in home appliances, whether it
is air conditioners, computers, or LCD TVs. So what is a field effect tube? Many
people have a vague understanding of field effect tubes, so let's talk about
what a field effect tube is.
Field effect tube is an electronic component, a semiconductor device that
controls the electric field effect of the input circuit, so it is usually called
a field effect tube. The origin of the field effect tube was proposed by the
team of Liyes Edgar Lilienfeld. The mechanism was discovered and explained in
the laboratory. In the 1920s, field effect tube semiconductor devices developed.
In 1959, the metal oxide semiconductor field effect transistor invented by Sanhu
Dawin Kahn and Martin Atala largely replaced the junction field effect tube and
had a profound impact on the development of digital electronics.
Field effect transistors are generally divided into two categories, one is
the N-channel junction field effect transistor and the other is the P-channel
junction field effect transistor. In the n-channel, the field effect transistor
is a depletion-type device. If the active area is expanded to be completely
closed, the resistance of the channel will increase from the source and drain,
and the voltage at this time will be pinched off. The voltage at this time will
be called the pinch-off voltage. On the contrary, the positive gate-source
voltage will be positively added to the relevant size, allowing electrons to
flow easily. At this time, the field effect transistor will be effectively
turned on and off like a switch. In the n-channel "enhancement" device, there
will be no conductive channel in the field effect transistor. The positive
voltage will attract enough biological electrons near the gate to offset the
field effect transistor ions, and a depletion layer will be formed. The further
increase of the gate-source voltage will form a conductive channel. This process
is called inversion. In the p-channel, the electrons are pressed from the gate
to the gate-insulator/semiconductor interface to widen the depletion layer,
which will carry countless carrier regions. On the contrary, in the p-channel,
there is no pure conductive channel, so it is necessary to strengthen the
negative voltage to conduct electricity.
Field effect tubes are also widely used. They can be used for amplification.
Because the impedance of field effect tubes is very high, electrolytic
capacitors are not needed. Field effect tubes are mostly used for impedance
conversion because of their high impedance. Field effect tubes can be used as
variable resistors, which can be used as constant current sources more
conveniently. Field effect tubes can also be used as electronic switches.
Shenzhen Mengke Electronic Technology Co., Ltd. is a company that produces and
researches field effect tubes. The development company's business scope
includes: general business projects: technical development, production,
processing and sales of diodes, triodes, and electronic components; it can meet
the needs of customers very well. If there is a need for related field effect
tubes, offline consultation or online communication can be carried out.
www.jymskj.com
Shenzhen JinyiMingsheng Technology Co., Ltd.
