1. What are the characteristics of electronic devices made of semiconductor materials compared with traditional vacuum electronic devices? Answer: It has good frequency characteristics, small size, low power consumption, and is convenient for the miniaturization of integrated circuit products. In addition, it is also particularly outstanding in terms of ruggedness, earthquake resistance, and reliability; however, it is not as good as vacuum devices in terms of distortion and stability. 2. What are intrinsic semiconductors and impurity semiconductors? Answer: Pure semiconductors are intrinsic semiconductors. In the periodic table, they are generally medium-priced elements. After adding impurity elements with high or low valence to intrinsic semiconductors in a very small proportion, impurity semiconductors are obtained. 3. Is a hole a carrier? Do electrons move when holes conduct electricity? Answer: No, but in its movement, it can be equivalent to a carrier. When holes conduct electricity, electrons of equal electric charge will move in the opposite direction. 4. When preparing impurity semiconductors, what proportion is generally used to dope intrinsic semiconductors? Answer: It is doped at a ratio of one millionth of the order of magnitude. 5. What is an N-type semiconductor? What is a P-type semiconductor? What phenomenon will occur when the two semiconductors are made together? Answer: A semiconductor in which the majority of carriers are free electrons is called an N-type semiconductor. Conversely, a semiconductor in which the majority of carriers are holes is called a P-type semiconductor. When a P-type semiconductor and an N-type semiconductor are joined, a PN junction is formed. [/quote] Complete NAND solution based on RL-USB and RL-FlashFS, stable and easy to use, can be used in batch products with confidence A programmer from Huawei in Shenzhen committed suicide by jumping off a building! Is working really that stressful? Four tips for power circuit design
1. Ceramic capacitors can use a variety of dielectrics, each with different properties that can greatly affect performance over its temperature and voltage range. The two most common dielectrics are Y5V and X5R. Y5V dielectric is inexpensive and provides high capacitance in a small package, but its capacitance varies greatly over its voltage and temperature range and is not suitable for DC/DC applications.
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