[The fat man will have a heavy work task tomorrow, get up early in the morning to work, and have a bite to eat at noon to run hundreds of kilometers to continue to work, first release the addition of the 100 monthly ticket, as long as there is time, I will try to do as much as possible. Pen Fun Pavilion wWw. ｂiquge。 ｉｎfo】

……

Liu Chen glanced at Gao Jian with some displeasure, people can be arrogant and self-improving, but such arrogance to others is over, always holding this kind of Lao Tzu's technology world's first awesome mentality will only limit himself, just like his former mind, a resentment, only hate God for making me ambitious, no matter how strong my technology is, it can't be done.

People have to be peaceful and relieved in order to see further.

Gao Jian's technical level is really good, his understanding and qualifications are all middle and upper, but his personality is arrogant, and Mr. Lin is too modest, if it goes on, the development will be very limited, it will be a pity, but it is difficult for a person to find his own problems and correct them, and he has to be guided by external forces.

"Since you have done DC power supply, you should know what buck and boost are, Huang Kai, what can you tell me about buck?" Gao Jian was even more dissatisfied with Liu Chen's delay in answering.

Huang Kai is really afraid of this senior brother, his temper is too big, but the graduation project and small thesis all rely on others, and he doesn't dare to say a word, especially Senior Brother Gao's face is very ugly today, and he doesn't know what gunpowder he has eaten, so he said with a smile: "Brother Jian also told us yesterday that buck is a step-down chopper circuit, which reduces the DC voltage through the duty cycle." ”

"How did you lower it?" Gao Jian asked.

"Well, you have to have a thyristor, and the switch will do, and then turn on and off. ”

"That's it?"

It didn't seem right, Huang Kai couldn't remember it for a while.

Gao Jian raised his voice and said: "I just said yesterday that I can't remember today, is it to add an inductor?"

"Yes, yes, there's an inductor. ”

"How does it work?"

Huang Kai's forehead was about to sweat, so many people were watching, and the two junior brothers and sisters gave me some face.

Gao Jian said angrily: "What can you learn well? Add an inductor, the switch conducts to form a path to supply power to the load, the switch is disconnected, the parallel diode forms a path, and the freewheeling effect of the inductor continues to be conducted." ”

"Yes, yes, Brother Jian is right. Huang Kai accompanied the smiling face, he must not touch his senior brother's head today, otherwise he will suffer.

"Zhang Jun, you talk about boost. ”

Nervous, "This...... This is a DC boost chopper circuit with a switch, a diode, and a capacitor. ”

"Is that all right?"

"Poor...... Almost. ”

"How do you boost the DC voltage?" Gao Jian's tone was aggressive, venting the depression in his heart, he had every reason to be unhappy today, the girl who had been chasing, just this morning, when he passed by the East Twenty girls' dormitory, he saw her hugging a boy together, and they both kissed, the shameless boy hugged her waist tightly, and the two of them were completely together.

One summer vacation, he is struggling to chase others, the girl is very beautiful, the height is 167, the third year of the media institute, the two of them went out to eat together a few times, watched two movies, the sister even went to the laboratory to study a few times, he occasionally took the opportunity to cross the road or something to grab his arm and did not resist, the girl's skin is delicate and cold, let him be intoxicated, no matter how you look at it, it looks like the rhythm of the future, and even last night's chat is no different from the past, but ...... I saw this thunderbolt on a sunny day.

He thought that the relationship was already very intimate and ambiguous, and the girl was completely regarded as an ordinary friend, and it was only the beginning of the new semester, when he really wanted to rush over and beat the unruly boy, the hand grabbed the handlebar tightly, and the white forehead was bruised, and finally he rode fast to the river and slammed a tree.

"The switch forms a loop when it is opened and broken, and the duty cycle controls the voltage. ”

Zhang Jun said cautiously.

"You can only lower the voltage like this, and you can't even lower the voltage, don't you think there is something missing? Don't you want an inductor?" Gao Jian's eyes were very scary.

"Isn't it an inductor for buck and a capacitor for boost?"

"Do you understand, do you understand? How can a capacitor be boosted? How does the voltage out of thin air increase?" Gao Jian almost roared.

Zhang Jun and Huang Kai are also aggrieved, especially the circuit in this book, you can just take a look at it when you use it, who has nothing to remember this thing.

"Inductor, there is also an inductor, the switch conduction power supply is charged to the inductor, the capacitor supplies power to the load, the switch is disconnected, and the power supply and inductor together supply power to the load through the diode unidirectional conduction, so as to achieve the effect of voltage boost. ”

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

Gao Jian glared, Huang Kai and Zhang Jun both looked down, he turned to look at Liu Chen and said, "What kind of structure is the DC power supply you make?"

"It's not buck, it's not boost, because the transformer amplitude is too large, it's the structure of DC-AC-DC. ”

"How much does the voltage go up?"

“200kV。 ”

"How often?"

"Less than 100k. ”

……

After asking a few questions in a row, Liu Chen answered them indifferently, and he was concise and to the point, Gao Jian, who didn't get out of his breath, frowned, he was very familiar with low-power power supplies, he had never done this kind of structure, and he couldn't ask any in-depth questions, so he had to give up.

I was still very unhappy in my heart.

Sister Doudou also saw that something was wrong with Gao Jian today, and said with a smile: "What's wrong with Dr. Gao today, did you quarrel with that little girl in your family?"

It's okay not to ask, as soon as he asked, Gao Jian's face turned red, the two of them went in and out of the pair many times, whether it was the laboratory or the classmates, they thought it was his girlfriend, and he acquiesced, which undoubtedly embarrassed him, exhaled a few heavily, suppressed his anger, and said: "You control too much, you think everyone is the same as you, and you will drop things in the laboratory when you quarrel with your boyfriend." ”

Sister Doudou's temper is also very hot, she has a boyfriend who has been talking for many years, but she has been hiding, sometimes she claims to be single and asks for an introduction, she drops her mobile phone directly in the laboratory, and sometimes she suddenly cleans up her things very loudly, which is a quarrel.

Gao Jian is naturally clear.

Sure enough, Sister Doudou was very angry, and she didn't dare to reply when she saw Gao Jian's posture of breathing fire, so she stood up and slammed a very thick hard-shell book on the table, followed by several books, and there was a lot of noise.

Han Jia was dumbfounded, this ...... What kind of laboratory is this, isn't it called the group under the fiber optic laboratory? This ...... The atmosphere is too different.

"You two come here, what kind of bullshit circuit is designed, common component op amps can be drawn wrong!" Gao Jian also yelled dissatisfied.

The two guys who wanted to graduate stood up helplessly and walked over, Gao Jian snorted and said: "We are discussing analog circuits, you two should also listen to it, analog circuits are not like simulation, which can be dragged directly on the computer, and it is not so easy to have good results with seemingly simple functions." ”

It's completely an educational tone. (To be continued.) )