This content summarizes the interview questions of hardware engineers from major manufacturers in the world. Let\'s make a collection for them to learn and refer to. The specific questions are as follows: Analog Circuit 1. What is the content of Kirchhoff\'s theorem? (Shilan Microelectronics) 2. The formula of the plate capacitor (C=εS/4πkd). (Unknown) 3. The most basic one is the curve characteristics of the triode. (Unknown) 4. Describe the concept of feedback circuit and list their applications. (Shilan Microelectronics) 5. Types of negative feedback (voltage parallel feedback, current series feedback, voltage series feedback and current parallel feedback); the advantages of negative feedback (reducing the gain sensitivity of the amplifier, changing the input resistance and output resistance, improving the linear and nonlinear distortion of the amplifier, effectively expanding the passband of the amplifier, and automatic adjustment) (Unknown) 6. What is the purpose of frequency compensation of the amplifier circuit and what are the methods? (Shilan Microelectronics) 7. Frequency response, such as: what is considered stable, and how to change the frequency response curve. (Unknown) 8. Given a point-to-point operational amplifier, how to phase compensate it, and draw the compensated Bode diagram. (Concave and convex) 9. Basic types of amplifier circuits (voltage amplifier, current amplifier, transconductance amplifier and transresistance amplifier), their advantages and disadvantages, especially the reasons why differential structures are widely used. (Unknown)
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