Sep 30 2019
I IntroductionThe resistor symbol as a kind of identification is unique to each type of resistor. There are many types of resistors, which can be divided into fixed resistors, variable resistors, special resistors, high-power resistors, low-power resistors, etc. They basically have different symbols
Sep 29 2019
Ⅰ AbstractBatteries have been widely used in life, from electric toys, dry batteries for remote control, car batteries, laptops batteries, and so on. Batteries also have been used in many other fields, such as electric tools, electric vehicles and bicycles, aerospace, solar and wind power
Sep 23 2019
IntroductionA series compensation device is used on the transmission line to improve the stable transmission capacity of the system, improve the electrical parameters of the line, and realize the power of three lines to transport three lines, which not only improves the transmission power but also s
Sep 19 2019
Ⅰ IntroductionAlthough there are many types of operational amplifiers, different amplifier circuits are suitable for interfacing with different types of sensors, but most complex amplifiers are built by combining operational amplifiers. In order to get good amplication effect, it is necessary to des
Sep 18 2019
Ⅰ Introduction A diode is a two-terminal device with unidirectional conduction. There are electronic diodes and crystal diodes. Most common and commonly used are crystal diodes. The unidirectional conduction characteristics of diodes are used in almost all electronic circuits, and it plays an impor
Sep 17 2019
IntroductionAn vacuum tube, also called electron tube or valve, or tube, is an electronic device that generates current conduction in a hermetic closed glass container, and utilizes an electric field to attract electrons in a vacuum to obtain signal amplification or oscillation. That is, a&nb
Sep 9 2019
IntroductionTemperature, as one of the seven basic quantities of the international unit system, is a variety of sensors for measuring temperature. The temperature sensor is the core part of the temperature measuring instrument. In a word, the temperature sensor is a sensor that can sense temperature
Sep 7 2019
Ⅰ IntroductionA vacuum tube, an electron tube, or valve, or a tube, is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied. Knowing more about it, carry these questions: what is vacuum tube? when was vacuum tube
Sep 2 2019
I IntroductionGround resistance testing methods are usually the following: two-line method, three-line method, four-line method, single-clamp method and double-clamp method. Each has its own characteristics. In actual test, we have to choose the correct testing method to make the test results accura
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