An integrated circuit is a miniature electronic device or component. A certain process is used to interconnect the transistors, diodes, resistors, capacitors, inductors and other components required in a circuit to form a small or a few small pieces of semiconductor wafer or dielectric substrate and then packaged in a tube. Inside the shell, it becomes a miniature structure with the required circuit function. Next Xiaobian introduced the advantages and disadvantages of integrated circuits and the detection of integrated circuits. Integrated circuit advantages 1, the circuit is simple. Due to the use of integrated circuits, the design, debugging, and installation of the entire circuit are simplified, and in particular after the use of some dedicated integrated circuits, the entire circuit becomes even simpler. 2, cost-effective. Compared with discrete component circuits, the overall circuit performance of integrated circuits constituted by integrated circuits is higher. Compared with discrete electronic component circuits, the cost and price of integrated circuits are lower. For example, the high gain of the integrated op amp circuit and the small zero drift are unmatched by discrete electronic component circuits. 3, strong reliability. The integrated circuit has the advantage of high reliability, thereby improving the reliability of the whole circuit work, and improving the work performance and consistency of the circuit. In addition, the use of integrated circuits, the solder joints in the circuit greatly reduced, the possibility of occurrence of the decline in the possibility of welding, making the whole circuit work more reliable. 4, less energy consumption. Integrated circuits also have the advantages of low power consumption, small size, and economy. Circuits of the same function use much less power than circuits using discrete electronic components. 5, the failure rate is low. Because the failure rate of the integrated circuit is relatively low compared to discrete component circuits, the failure rate of the entire circuit is reduced. Integrated circuit defects 1, the circuit is difficult to remove. The pin of the integrated circuit has brought a lot of difficulties to repairing and disassembling the integrated circuit, especially the four-row integrated circuit with many pins, and it is difficult to disassemble. 2. The cost of repairs increases. When some circuits in an integrated circuit circuit fail, it is usually necessary to replace the entire block, which increases the cost of repairs. 3, fault judgment is inconvenient. Relative to discrete electronic component circuits, it is inconvenient to accurately determine IC faults when troubleshooting certain special faults. Integrated circuit testing 1, logic analysis The so-called logic analysis means that if you suspect a problem with an integrated circuit, you can first measure whether the input signal of the integrated circuit is normal, and then measure whether the output signal of the integrated circuit is normal. If there is an input and no output, generally it can be judged as the integration. The circuit is damaged. 2, DC resistance comparison method The DC resistance comparison method compares the DC resistance value of each pin of the integrated circuit to be detected with the DC resistance value of the normal integrated circuit to judge the quality of the integrated circuit. The same multimeter must be used for measurement, and the same electrical barrier should be used to reduce the measurement error. The DC resistance comparison method can detect integrated circuits of different models and different structures, but they must use the same type of normal integrated circuit as a reference. 3, elimination method The elimination method means that if a certain part of the circuit (including the integrated circuit) is judged to be faulty during maintenance, it can be detected whether the discrete components of this part of the circuit are normal. If the discrete component is normal, the integrated circuit has a problem and the replacement of the integrated circuit should be considered. 4, DC voltage measurement DC voltage measurement method is a common method for detecting integrated circuits. It is mainly to measure the DC working voltage value of each IC pin to ground, and then compare with the nominal value to judge whether the integrated circuit is good or bad. Editor's summary: The advantages and disadvantages of integrated circuits and the detection of integrated circuits are introduced here, and we hope to help everyone. If you want to know more related information, you can pay attention to this website information. Advantages and Disadvantages Comparison Pollution Detection and Management IC
Drum brush is divided into long hair, medium hair, short hair three kinds, its performance is the length of the drum brush hair, rather than the thickness and length of the drum itself, brush hair is usually divided into wool and chemical fiber two kinds.
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Different rollers will brush different effects, long hair rollers will brush out some fine texture, concave and convex feeling, similar to the texture effect. The paint surface after short wool roller besmear is more uniform, smooth, without concave and convex feeling, in the wool is between the two.
Roller brush is mostly made of wool and foam plastic, which can be divided into paint drum brush, hair drawing drum brush, floor paint drum brush, flat coating drum brush, etc., mainly used for large-area paint rolling in architectural decoration engineering. And can be used for coating and rolling all kinds of paint, such as: latex paint, anti-rust paint, internal and external wall paint, wallpaper glue, etc.
Note:
The use of drum brush as long as the straight brush can be wiped, if you want to daub evenly, the drum is best in the paint bucket to be fully absorbed, and then take out a few rolling on the inclined plane, press out the excess paint and then begin to brush the wall.
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