Chapter 847: Another Unit Comes In

Gao Zhendong smiled and said, "It's not a big problem. This device is partly used in digital circuits. As for the analog circuit part, it has also been considered. That is the problem that the power electronic devices mentioned earlier need to solve."

Digital circuits do not have high requirements for linearity. They work through level thresholds. 1 is 1 and 0 is 0. As long as it is not too outrageous, it will have little impact on its operation. At this time, the isolation function of the optocoupler is mainly used. Of course, it is also possible to use it to amplify the driving current, but these two uses do not have such high requirements for linearity.

As for how to ensure linearity in analog circuits in order to guarantee the working condition of analog circuits, that is why Gao Zhendong developed one of the power electronic devices in advance. This guy can do this.

After hearing Gao Zhendong bring this up, Chief Engineer Cui followed his lead and asked the question that everyone had been itching to ask for a long time: "Chief Engineer Gao, is this power electronic device you mentioned the new component we are going to develop? What exactly is it?"

Gao Zhendong nodded: "Yes, I plan to make two kinds of power electronic devices, one for high power and medium and high frequency, and one for low power and low frequency to high frequency. The low power one is used for this. This thing is quite special. You can think of it as a crystal triode in terms of its usage and function in the circuit. In fact, it is indeed a kind of triode, but it does not conduct by PN junction, but by a conductive channel. In this case, its performance in the circuit can be equivalent to a resistor..."

resistance!

That's right, isn't this exactly the same as a photoresistor, only the switching frequency and other characteristics are different, but this point is correct.

"I see. No wonder you are so confident. To be honest, I have never heard of any semiconductor with such properties."

Gao Zhendong smiled and said, "You've never heard of it. This is actually a new component. And its newness is not just a minor modification. The 'newness' of this thing is that the principle is completely different. This thing is called a metal oxide field effect transistor, MOSFET."

These words frightened both Director Pan and Chief Engineer Cui. The "new component" they were thinking of was really the kind of small-scale new component that Gao Zhendong mentioned, with minor modifications. In principle, he would not dare to think about creating a new component no matter how brave he was.

1274: Hey, you'll get used to it slowly.

Chief Engineer Cui asked carefully, his throat even a little dry: "Chief Engineer Gao, do you mean this is the first of its kind in the world?"

Gao Zhendong thought for a moment and said, "Not really. It was invented last year, and the concept was even earlier. But it was used on microelectronic chips and power electronic chips last year. This is the first time it has been used. Its structure is somewhat different from that on microelectronic chips."

Chief Engineer Gao is really well-informed. Chief Engineer Cui said with a smile: "General Manager Gao, I really don't have your ability to draw inferences from other cases like you. You have already digested and absorbed such a new technology and opened up new paths."

"I don't need to digest it. I used it on microelectronic chips last year. The integrated circuits produced by 1274 all use this stuff."

MOSFET, Metal Oxide Semiconductor Field Effect Transistor, was first proposed in the 20s. Citigroup worked on it for decades, with multiple companies working on it, including RCA, Bell Labs, etc. They started applying for patents in 60, produced a practical product in 62, and obtained the patent in 63.

But with Gao Zhendong, the situation changed.

In 61, this guy directly put PMOS into mature integrated circuits, while the product made by Citigroup in 62 was just an idea, which was very slow and had no practical value in the early stage. In this context, many things have changed, and some related work has also been carried out accordingly. At least the historical materials of the history of semiconductor development will change a little.

However, there are differences between MOS and MOSFET, and the latter is more subdivided. As for intellectual property rights, Gao Zhendong will not talk about them, as someone is responsible for them.

What he is preparing to develop now is MOSFET, a FET (field effect) tube developed using MOS (metal oxide) technology. It will be the king of low-power power electronic devices in the next few decades, without a doubt.

Gao Zhendong said this casually, leaving Director Pan and Chief Engineer Cui speechless. So it was you again?
No wonder he was so confident, it turned out that similar technology had been used in other places.

"What about the other high-power one?" asked Chief Engineer Cui.

"That high-power kind is related to thyristors, but not exactly the same. It has a very important new feature, which is the ability to shut down autonomously."

At this time, the comrades of 1218 realized the seriousness of the problem. Chief Engineer Gao had given too much.

Can't finish it, can't finish it at all.

Two types of optocouplers, plus a low-power MOSFET, were already very difficult for Factory 1218 to handle, and adding a new type of thyristor was completely beyond their capabilities.

Director Pan thought for a moment and said carefully: "Chief Engineer Gao, should we ask another unit to come over for this thing?" No, he had to get someone else.

He knew very well that he should not be greedy. If he became greedy and could not eat what he fought for, he would be in trouble.

Not to mention the attitude of the department, the mere fact of delaying work made him feel like he was committing a crime.

So since we can’t eat it all, it is necessary to get another relevant unit to come in.

Gao Zhendong didn't care. They were familiar with the internal affairs of the 12th Ministry of Machine Building and knew which units could be used. On such details, they might even know better than the leaders of the 12th Ministry of Machine Building: "Which unit?" There is strength in numbers, and as long as they can control the situation, they will not be afraid of the troubles brought by management.

It just so happened that Gao Zhendong was the type who could absolutely control the situation in the 12th Ministry of Machine Building.

"The 16th Research Laboratory of the Institute of Electronics is also responsible for work related to thyristors, and it is located in Beijing. Both the professional direction and work convenience meet the requirements." Director Pan expressed his thoughts, and his reasons were sufficient and reasonable.

When Gao Zhendong heard this, he thought it was a good idea. At least the high-power device he wanted to make was based on thyristors. The situation in Room 1218 did meet this requirement. At least in this regard, they had more foundation and experience than Room and should be able to work together well.

"Well, okay, your suggestion is good." He nodded in agreement.

Director Pan looked at his watch and said, "Then, Mr. Gao, it's almost time to get off work today. Since we still need to invite another company to come in, let's do this for today. We will be responsible for inviting them to come in the next one or two days. When they arrive, we will learn from you."

Since you need to recruit people, there is no need to trouble Chief Engineer Gao to say the same thing twice.

Gao Zhendong thought about it and decided it was a good idea. It was almost time to get off work. Given Lou Xiaoe's situation, he would rather not stay in the office any longer. Mainly given the current situation, it would be more appropriate to wait until the people from Room 16 arrived.

"Okay, then we'll talk about it tomorrow or the day after tomorrow. The specific date will depend on when you invite the comrades from Room 16 over. Come on, let's go to the cafeteria. Since we're here, let's have a simple meal, hehe." Gao Zhendong invited them.

It’s almost time for dinner, so I still have time to have a meal with my comrades.

The comrades of 1218 readily agreed. For Director Pan and Chief Engineer Cui, even if they were not greedy for the meal, they still had comrades accompanying them, and they could not help but consider their comrades' ideas.

There is a legend inside the 12th Ministry of Machinery that the food in the cafeteria of the 3rd Rolling Mill of the 17th Ministry of Machinery is delicious! There is a chef there with great cooking skills.

This was spread by people from the 12th Ministry of Machine Building who came to Gao Zhendong for work. His so-called reputation was built up little by little in this way.

Gao Zhendong dared to say that if Sha Zhu retired and opened a restaurant decades later, the business would definitely be good. He wouldn't even need to give it a special name, just "Red Star Canteen" would be fine. The Third Rolling Mill is also called the Red Star Steel Rolling Mill, which has a double entendre and is very good.

Sha Zhu, who just got married, was in high spirits. He personally went to the cafeteria window to get his meal. There was no other reason. Qin Huairu also had an afternoon shift today, so the couple could see each other at lunch time. They just got married, so he missed each other a lot.

Sha Zhu, who had just served Qin Huairu lunch and was teased by the workers in front and behind him, threw his spoon away when he saw Qin Huairu walking out of the cafeteria with her lunch box. He said, "Ma Hua, come and take over!"

You have already seen your wife, why are you still standing here? What is your apprentice going to do with it?

Sha Zhu, who had deserted the battlefield and was laughed at by his fellow workers, smiled happily when he saw Gao Zhendong coming with his men. Banggeng and his children had delicious food again.

"What are you laughing at? It's not that I don't want to do it. I have to do reception work here. Do you understand?"
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The two programmable switching systems from the Russians were the fastest to arrive. We even directly allocated two of them from a batch of prototypes. We had imitated their lifting and rotating switching systems and were familiar with their switching network, so they were highly compatible and did not need any modifications.

As the big brother, we still need to treat him preferentially and supply the goods to him quickly.

The Russian communication experts gathered together, looking at the two switches in front of them and whispering to each other.

"It's hard to imagine that the technology of our southern comrades is developing so fast."

"With this size, they can achieve a capacity of 800 doors. Their miniaturization technology is amazing."

"Where's the instruction manual? Let me see it."

"..."

During their conversation, the back panel of one of the machines was removed, and the most conspicuous thing that caught their eyes was two circuit boards that looked similar to those of the DJS-60D.

"This is really good news. Our comrades are almost halfway through the process of copying the DJS-60D. The further we go, the faster it will be. Since this switch uses the DJS-60D control, the only thing left is the software."

An old Russian communications engineer was delighted, the controller and control software were the core, the controller was already being copied and seemed very close to success, then the remaining software would be easy, these days the programs were very easy to copy and analyze.

(End of this chapter)