[The fat man has a heavy work task tomorrow. He gets up early in the morning and has to travel hundreds of kilometers to continue working at lunch. He will first release the 100-month ticket updates. As long as he has time, I will try to update as much as possible.]

...

Liu Chen glanced at Gao Jian with some displeasure. People can be proud and can be self-improvement, but this kind of arrogance towards others is gone. I always hold this kind of mentality that I am the most awesome in the world and will only limit myself, just like his former mind, a sense of resentment, and I only regret that God has made me unfulfilled ambitions, and no matter how strong my skills are, it will not be possible.

Only when a person has to be peaceful and relieved can he see further.

Gao Jian’s technical level is indeed good, and his understanding and qualifications are all medium and superior, which means he is arrogant. Teacher Lin is too humble. If he continues, his development will be very limited, which would be a pity. However, it is difficult for a person to discover his own problems and correct them. He needs external guidance. Thinking of this, Liu Chen intends to mention him.

"Since you have done a DC power supply, you should know what Buk and OST are, Huang Kai, tell me what Buk is?" Gao Jian was even more dissatisfied with Liu Chen's refusal to answer.

Huang Kai was really afraid of this senior brother. He had a very bad temper, but he relied on others to graduate and had no idea what kind of drugs he had taken. He smiled and said, "Brother Jian told us yesterday that buk is a step-down chopper circuit that reduces the DC voltage through duty cycle."

"How did it be reduced?" Gao Jian asked.

"This requires a thyristor, switch, and then turn it on and off."

"That's all?"

It seems that something is wrong, Huang Kai can't remember it for a moment.

Gao Jian raised his volume and said, "I just said yesterday that I can't remember today. Should I add an inductor?"

“Yes, yes, there is an inductor.”

“How does it work?”

Huang Kai's forehead was sweating. He was watching so many people, and he still had two junior brothers. I gave me some dough.

Gao Jian said angrily: "What can you learn well? Add an inductor, switch conduction to form a path to supply power to the load, switch is turned off, and parallel diodes are connected to form a path. The free-current effect of the inductor continues to conduct."

"Yes, yes, Brother Jian is right." Huang Kai smiled and must not be bad today, otherwise he will suffer.

"Zhang Jun. Tell me about the ost."

I was nervous, "This... this is a DC boost chopper circuit, with a switch, diode, and a capacitor."

"Is this OK?"

"It's almost done."

"How to increase DC pressure?" Gao Jian's tone was aggressive, venting his depression. He had sufficient reasons for being upset today. The girl he had been chasing was just this morning when he passed by the girls' dormitory of Dong-20, and saw her hugging and a boy. They both kissed him. The shameless boy hugged her waist tightly, and both of them were completely pressed together.

One summer vacation, he struggled to chase others. The girl was very beautiful, 167 tall, and a junior in the media. The two went out to have dinner together several times and watched movies twice. The girl even went to the laboratory to study for herself several times. He occasionally took the opportunity to cross the road and grab his arms without resisting. The girl's skin was delicate and cold, which made him intoxicated. No matter how she looked, it seemed to be a rhythm. Even the chat last night was no different from before, but... she saw this bolt from the blue.

He thought the relationship was very close and ambiguous. The girl regarded it as an ordinary friend. The new semester was just beginning. At that time, he really wanted to rush over and beat the irregular boy. His hand tightly grabbed the handlebar. The white forehead veins swelled up, and finally rode quickly to the river and beat a tree.

"A switch opens and closes, it forms a loop, and the duty cycle controls the voltage."

Zhang Jun said carefully.

"You can only reduce the voltage, or even the voltage reduction. Don't you think there is something missing? Do you don't need inductor?" Gao Jian's eyes were scary.

"Don't Buk use inductors and wave OST use capacitors?"

"Do you understand it? How can a capacitor be boosted? How does the voltage out of thin air come out?" Gao Jian almost started to yell.

Zhang Jun and Huang Kai were also wronged. The circuits in this book are available, so I can just take a look at them at the time. Who can remember this thing if you have nothing to do?

"There is also an inductor. The switch conducts the power supply to charge the inductor, the capacitor supplies power to the load, the switch is off, and the power supply and the inductor are supplied to the load through a one-way conductor of the diode, so that the boosting effect can be achieved."

"Oh, yes, Brother Jian is right, I remember it completely this time."

Gao Jian glared at him, Huang Kai and Zhang Jun both looked down and ignored him. He turned to Liu Chen and said, "What kind of DC power supply structure is the DC power supply you made?"

"It's not buk, nor wave ost, because the transformer amplitude is too large, but the structure of dc-ac-dc."

"How much does the voltage rise?"

“200kv.”

"What's the frequency?"

“Not less than 100k.”

...

After asking several questions in a row, Liu Chen answered them calmly, and he was concise and to the point. Gao Jian, who did not lose his breath, frowned. He was very familiar with small-power power supplies, and he had never done this structure before. He could not ask any deep questions, so he had to give up.

I was still very unhappy.

Sister Dou Dou also saw that something was wrong with Gao Jian today and smiled and said, "What's wrong with Dr. Gao today? Are you quarreling with that little girl in your house?"

It would be fine if he didn't ask this. When he asked, Gao Jian's face turned red. The two of them went out to work together many times. Both the students in the laboratory and the class thought it was his girlfriend, and he agreed. This undoubtedly made him embarrassed. He let out a few breaths, suppressed his anger, and said, "You're too much in charge. Do you think everyone is like you, and you'll throw things in the laboratory when you quarrel with your boyfriend."

Sister Doudou has a hot temper. She has a boyfriend who has been dating for many years, but she has been hiding. Sometimes she claims to be single and asks for an introduction partner. She directly threw her cell phone in the laboratory, and sometimes she suddenly clangs loudly and packs things. This is a quarrel.

Gao Jian is naturally clear.

As expected, Sister Dou Dou was very angry. Seeing Gao Jian's fire-blowing posture, she didn't dare to speak back. She stood up and threw a very thick hard-shelled book on the table. There were several books next, and the noise was very loud.

Han Jiaren was stunned. This... this is a laboratory? Isn't it called the group under the fiber optic laboratory? This... this atmosphere is too different.

"You two come here and design a bad circuit. You can draw common components and op amps incorrectly!" Gao Jian shouted in dissatisfaction.

The two guys who were just trying to graduate stood up helplessly and walked over. Gao Jian snorted: "We are discussing analog circuits, so you two can listen to them. The analog circuits are not just like simulations, just drag them on the computer. It seems simple to have good results. It is not that easy to have a good effect."
Chapter completed!