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Anonymous users2024-02-09DC parameters. 1: Common Radiation DC Amplification Factor [Formula].
formula], when [formula], [formula].
2: Common base DC amplification factor [formula].
When [Formula] is negligible, [Formula].
3: Reverse current between poles.
Equation] is the reverse saturation current of the collector junction when the emitter is open.
Equation] is the penetration current between the collector and the emitter when the base is open.
For the same type of tube, the smaller the reverse current, the more stable the performance.
When selecting tubes, the [formula] and [formula] should be as small as possible. The interpole reverse current of a silicon tube is 2 [formula] 3 orders of magnitude smaller than that of a germanium tube, so the temperature stability is also better than that of a germanium tube.
AC parameter – is a metric that describes the performance of a transistor for a dynamic signal.
1: Co-emission AC current amplification factor [formula].
Formula] (Formula] constant).
When selecting tubes, [formula] should be moderate, too small will not have strong amplification ability, too large will have poor temperature stability.
2: Co-base AC current amplification factor [formula].
Formula] (Formula] constant).
In approximate analysis it can be thought of as [formula], formula].
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Anonymous users2024-02-08Today's function up and down and protection function is mainly if the store is urgently called, it can be automatically stopped.
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Anonymous users2024-02-07It depends on the specific situation, in general, its main body is very good, and relatively speaking, it can achieve a very good use effect, and there will be no problems.
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Anonymous users2024-02-06The big elevator main transistor is an integrated circuit tube.
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Anonymous users2024-02-05Share how to measure the output point of the Siemens S7-200 transistor output PLC!
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Anonymous users2024-02-04Transistors are components made of semiconductor materials, and are divided into crystal diodes and transistors according to different functions and occasions of use.
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Anonymous users2024-02-03Semiconductor devices made of silicon, germanium and other semiconductor materials are called transistors.
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Anonymous users2024-02-02MPU is the meaning of microprocessor of single-chip microcomputer, PCB is printed circuit board, SDA is the data line of I2C bus, I2C has two lines, and the other is SCL is the clock line.
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Anonymous users2024-02-01Shanghai Yongda Elevator Fault**: 1. Operation mode: 7a64e59b9ee7ad9431333365643661 mode - 2 - set
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Anonymous users2024-01-31I feel that this and this means that it is something with that, as long as your data is right, the others are good to him, and the others I don't feel too big.
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Anonymous users2024-01-30This is a model of the elevator. It is a kind of general purpose elevator.
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Anonymous users2024-01-29MPU stands for microcontroller.
A PCB is a printed circuit board.
SDA is the data line of the I2C bus, and the I2C has two lines, and the other is the SCL is the clock line.
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Anonymous users2024-01-28Are transistors made of semiconductor materials? Common semiconductors are silicon and germanium, which are different from copper? A conductor in which electrons can move freely such as iron is also different from an insulator in which electrons are imprisoned such as rubber, but an object with special electrical conductivity?
A transistor made of semiconductors is only the size of a small firecracker? Compared to the tube, the transistor is only a few tenths of its volume or less, and it consumes very little power, and lasts 100 times longer than the tube? Transistor.
A transistor is a semiconductor device, and a crystal diode has a negative and positive electrode (equivalent to the cathode and anode of an electronic diode), which acts the same as an electron tube triode; A transistor has three poles: a collector, a base, and an emitter (corresponding to the anode, gate, and cathode of the tube, respectively), and is mainly used for amplification circuits and switching circuits. Transistors have been much smaller than tubes, and computers that were the size of several rooms were made out of tubes, and transistors have been reduced to several cabinets. >>>More
The three poles of a bipolar transistor are composed of an n-type and a p-type emitter, base and collector. Because transistors have three polarities, there are also three ways to use them, namely emitter grounding (also known as co-emission amplification, CE configuration), base grounding (also known as path, the most commonly used use should belong to signal amplification, followed by impedance matching, signal conversion, ......Transistors are a very important component in circuits, and many precision components are mainly made of transistors. >>>More
Infrared-activated substances in semiconductor devices emit characteristic near-field spectral signals. These signals allow the identification of different substances. The capture of these signals requires scattering scanning near-field optical microscopy. >>>More
The most important thing in dormitory management is to manage the daily life of employees and students, and to give everyone an orderly living environment and conditions.
As follows: 1. Motor vehicle loss insurance: motor vehicle loss insurance is the car damage insurance that we often hear in daily life, the so-called car damage insurance, that is, the owner in the process of driving, because of the accident caused by all or part of the loss of the vehicle, the insurer shall be compensated in accordance with the insurance contract. >>>More