Huayu for engineering students

Chapter 246 The prototype of two power amplifiers

"Wang Xu, at least you should use some snacks. You also proposed the supercomputing plan." Professor Yan finally saw Wang Xu again a few days later, feeling a little headache.

"It seems to have just started. What's the problem?" Wang Xu looked at Professor Yan with a puzzled face. He wanted to ask the roommates how the circuit design was going. It's been several months. It should work out.

Before, well, Wang Xu admitted that he had already forgotten about it.Several roommates were too busy with making up lessons, taking exams, and doing chores a few years ago.

It wasn't until later in the year that I remembered that I needed to design a circuit for power amplifiers. However, with the various supplementary lessons in the past few months, the abilities of these roommates have also made great progress.

I have also discussed with Wang Xu several times, and have recently carried out circuit design under the guidance of my instructor, which is the power amplifier circuit under different power levels that Wang Xu wants.

This time Wang Xu came here to discuss something, and today he will have a summary meeting, but he was called away by Teacher Yan as soon as he showed up.

"It didn't go very smoothly. Although the content you gave was detailed, the scope of the design was too broad. It was okay for everyone to face their own part, but in the end, the sum and coordination with each other were a little bit blind.

It is said that I should be in charge of this matter, but I haven't fully understood your stuff, so you are still the chief scientist. Can you arrange a Q&A? I am humbly asking for advice. "Professor Yan's words are no longer polite, almost pleading.

"It's okay, I was negligent. From next Monday, I'll come to you all right, let's sort it out together." Wang Xu suddenly felt guilty.

Throwing too many things out by myself is just saying what I know.But for these project leaders, this is a matter of life and wealth.

Professor Yan is Wang Xu's mentor after all. For such a long time, not only did he not put on airs, but he even talked politely.

Wang Xu is also counting on this project to graduate with a Ph.D., so he really has to make good arrangements.

But today, I still have to continue discussing the power amplifier with my classmates.

These things are actually prepared for future enterprises, the one invested by Zhou Feng and his family. In the past few months, they have been collecting various information in Xinjiekou.

Made many friends and learned a lot of business information.Their factory has opened in Gusu, where they are now making mass-produced speakers.

At present, there are finished products, and their family is well established. Gusu has been encouraging private industries, so they successfully obtained the admission qualification for the Canton Fair next month.

Moreover, as an electronic product recommended by Gusu, the active speaker series is a mature solution given by Wang Xu, so they are very confident that they can shine at the Canton Fair.

Although many components still have to be imported, as long as they can successfully obtain export orders at the Canton Fair, Gusu will help with the foreign exchange needed for the components.

However, passive home speakers, because there has been no matching power amplifier and tuning, the effect has been unsatisfactory.

Compared with the power amplifier that Wang Xu got, it is a bit far away. Besides, Wang Xu's amplifier is a tube amplifier, which is not suitable for ordinary household use, and it has not been authorized for them.

Therefore, they also urgently need a series of power amplifiers and tuners that can be mass-produced and specially optimized according to the speakers they produce.

So, today's seminar, they also came.

Today's keynote speaker is of course not Wang Xu, but a few roommates, and Zhou Feng's father and several relatives are sponsors, and the consumables for the experiment are reimbursed by them, and they are free of charge.

This is a trivial matter, after all, they are in a hurry than anyone else, and some electronic components only cost a few dollars.

Wang Xu sat below and listened to several roommates come up with their own design plans. Of course, several instructors from the Department of Automation would also be present.

It's all agreed in advance, although most of the work is done by a few roommates, and a few teachers are tutoring and guidance, but the final intellectual property rights include their income.

Therefore, several teachers can be said to be dedicated to their responsibilities, almost hand in hand to train a few roommates.

Of course, they also personally took action to solve some problems. What Wang Xu saw today was the result of several changes they made.

Experimental products have already come out, except that there is no shell and look very simple, all kinds of functions have been tested and perfected.

Wang Xu's main work today is to look at the pictures and listen to the sound.

Look at their circuit diagrams, listen to them explain the ideas of the circuit diagram, and then listen to the effect of the finished product, what kind of speakers are matched, and how the effect is.

The whole seminar is not so much a discussion as a defense. Wang Xu is the project initiator and the project acceptor, and he will listen to the acceptance defense here.

The four people designed a set of products, all using transistors, but the corresponding speakers ranged from small bookshelves, to vertical, to the largest box, matching and adjusting a series of speakers given by Wang Xu.

Wang Xu will give a judgment today, who has a good product effect and who has a bad effect, what is good and what is bad.

The power amplifier is also a system engineering, and it is particularly easy to become a seesaw. This frequency band is excellent, and there are not a few cases where the hips are stretched in that frequency band.

The entire meeting lasted three hours. Wang Xu carefully judged the pros and cons of the four groups of products and gave corresponding scores.

In the end, in the test of small and medium speakers, the work of Hu Ershui, who has always had a low appearance rate, won the championship.

Although he didn't get the highest score in any frequency band, he has the highest overall score. The very delicate balance allows a pair of small bookshelf boxes to show excellent performance.

When pushing the big box, it was the work of the boss Zhan Wenbo who came out on top. This power amplifier is characterized by the type that has both advantages and disadvantages. It performs very well in the low range. It is deep, stable, and crisp. No shortage.

But the performance in the high range is mediocre. How should I put it, it feels a bit mushy, just like the feeling of being covered with a layer of cloth.

This time, Wang Xu decided to improve two power amplifiers based on the design of the boss and Ershui.Available as high and low power options.

Obviously, the works of Zeng Yandong and Zhou Feng are slightly inferior. Wang Xu knows the strength of these two brothers, and it is estimated that various liaison work consumes a lot of energy, so he didn't spend too much time here.

This is also normal, people have so much energy, lost in the east, harvested in mulberry, grows all the time, who knows which cloud has rain.

Both of them have their own positions, and they are obviously more suitable for various communication and integration positions, and there is no problem in developing in that direction.

Moreover, the talents of the two are definitely not bad. Although this time's work is not outstanding, it also has its own bright spots.Finally, Wang Xu will adjust and polish it. The final results of the few people are still worth looking forward to.

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(and also)
(End of this chapter)