Let’s discuss the shortcomings of analog circuits.

fighting

Let’s discuss the shortcomings of analog circuits. [Copy link]

　After graduating from graduate school and just starting to work, I always thought I had learned a lot, but now I realize that I am still far from it. During my graduate studies, I felt that I was really hardworking and diligent, seizing every opportunity to train myself. My mentors also gave me a lot of small projects, through which I have made great progress in single-chip microcomputers, digital circuits, and automatic control. However, I found that not only me, but many people have great deficiencies in analog circuits.

Some people believe that the development of digital circuits will replace analog circuits. In many electronic devices, digital circuits are basically used to solve the problem. They also believe that digital circuits are easier to learn. I think they should be easier to use. Find the chip with the function you want to choose, read its English information, and then take its typical circuit and put it in your own circuit diagram. It's 0k, and the rest is a matter of program. Basically, some simple devices can be implemented in this way. If AD is required, then find a relatively simple typical signal pre-processing circuit. Take a closer look at these circuits, which are basically relatively basic filtering circuits. At that time, I only knew to use it, but did not study it in depth.

So, after working on some digital circuits, I found that digital circuits are actually like building blocks, which can be used in many places. To put it nicely, it belongs to "modular design". Therefore, I feel that a large part of the time spent on digital circuit programming is spent on programming. At first, I used assembly, and later I used C. Basically, from 89C51 to c8051f020, to msp430, and then to Lingyang microcontroller, the model is basically the same, and the program just needs to write a few more control words. [][][]

Now, I am making an oscillating circuit, transmitting ultrasonic waves, receiving weak ultrasonic waves, and then processing signals. Signal processing is easy now, and it can basically be done by writing in C. However, the generation of ultrasonic waves, power amplifier, frequency selection, reception of ultrasonic waves, several levels of frequency selection amplification, etc., have already made me exhausted. Only then did I realize that I was far behind in analog circuits. I didn't know where to start with analog circuit analysis. I took out the textbook to cram, but I didn't feel very good. Later, I asked around and found that many people were confused and even afraid of analog circuits. I felt that I had no idea where to start when learning, and I was dizzy when looking at their circuits. I built another one based on other people's circuits, and found that "the same circuit, the same device, why is the difference so big?"

I am also afraid of analog circuits and want to escape from them, but if I want to develop in this area, I have to face it eventually. I hope the experts here can give me some guidance, some learning methods and experiences, or some good learning websites. Now I am very eager to improve myself in analog circuits.