Siheyuan: Starting from a fitter

Chapter 125 The birth of the first chip

At noon, we had a delicious stir-fried meal, which was cooked by Shazhu of San Canteen himself.Although it is still potatoes and cabbage, it is made with meat oil as a base and some oil residue is added, so that the color, flavor and flavor are all present.

Li Guocheng was also very surprised. Silly Zhu, who was not stupid in the first place, liked Labang Tong so much. Could it be that, as the majority of seniors said, his liking for pretty widows was engraved in his genes.

In the afternoon, I kicked a few people out of the first laboratory and told them not to disturb me. Then I went into my mind and remodeled the 5 circuits of the radio buffer input, three-stage amplification, and buffer output in three dimensions, and put them on a small wafer. Reproduce 7 transistors, 28 electrons and 14 capacitors.

In order to verify the circuit, the size of the engraved wafer is 1*3cm, which is enough space. Under the control of meticulous thoughts, Li Guocheng completed the engraving in the secret laboratory, and then carefully placed it according to the data of the doped trace elements of the previously prepared transistors. Adulterants.

After starting the vacuum furnace, 40 minutes later, three chips that may be the first commercially valuable chips in China were designed.

Using telekinesis to observe the heat diffusion effect, I found that one chip was not ideal, so I put it aside first.

The simply packaged chip appears on the test bench.Have you ever seen the black dog-skin plaster on some electronic postcards? They are simply packaged chips.

Disassemble the radio, disconnect the corresponding circuit, and connect the chip directly with flying wires.Turn on the switch, no matter how you adjust the channel, there is a rustling noise.Using the DC voltage range of the multimeter, it was found that the signal at the last stage was completely saturated, and a stable voltage of 5V appeared on the multimeter.

Replaced another chip with the same result.

For the next week, Li Guocheng lived a closed life, constantly adjusting parameters and experimenting.Sleep when you are sleepy and eat when you are hungry.Each chip and corresponding parameters are recorded in different positions of the workbench.

By the time I saw Zhao Ting again, 18 days had passed.Li Guocheng's image is like a beggar, with unkempt hair and an unkempt appearance. If it weren't for the Kung Fu skills, no one would want to get close to him due to his smell.

Zhao Ting was called by Wu Liankui. He was frightened by Li Guocheng's state and ignored everyone. He locked himself in the laboratory and could only see him when he went to the toilet.

When others talked to him, he seemed to be unable to hear them. He kept mumbling and his eyes were straight.

Unable to bear it, Wu Liankui found Mr. Zhao and then contacted Zhao Ting.

"Let's go home and rest for a day, shall we?" Zhao Ting looked at the changed Li Guocheng, her heart ached, and her tone was extremely gentle.

Seeing Zhao Ting, Li Guocheng seemed to have returned to reality, "Okay, wife, go home." Matching his appearance, the smiling Li Guocheng looked more like a fool.

Take a shower, sleep, sleep, and then sleep. The next morning, Li Guocheng woke up and looked at Zhao Ting in his arms distressedly. He couldn't help but lower his head and bury it in her hair, sniffing deeply.

Zhao Ting, who was disturbed by the noise, wrinkled her nose, turned around and fell asleep again.

Li Guocheng got up and played a set of Wuqinxi in the yard. He was slightly sweating. After going into the room to wash up, he sat down at the table.

"Aunt Liu, it's been a long time since I've had the food you cooked." Li Guocheng served him flatteringly.

"It's nonsense, it's only ten days!" Knowing that Li Guocheng was being polite, Aunt Liu still laughed so hard that she couldn't even see her eyes.

"The ancients said: One day without food is like three autumns." Li Guocheng began to suffer from poverty.

"You just have to be poor," Aunt Liu scolded with a smile.

"Zhao Ting was tired last night. Please let her sleep a little longer." Li Guocheng did not shy away and directly asked Aunt Liu.

"Go to work with peace of mind. I will take care of your wife." Aunt Liu sent Li Guocheng out of the house like a fly.

Along the way, Li Guocheng suddenly discovered that spring has arrived, the branches spit out green shoots, and the grass is already several centimeters high. The morning breeze makes Li Guocheng, who is riding a bicycle, feel relaxed and happy.Listening to the chirping of birds, it feels like the ancient city is recovering.

Immersed in the beautiful morning, his mood seemed to soar into the air. It was not until he saw the students at the intersection that Li Guocheng realized that the sky still seemed to be covered with gray mist.

I got out of the car and was pushed along. When I passed by, I shouted a few slogans and arrived at the laboratory smoothly.

When he opened the door to the first experiment, it was just like yesterday. No one dared to touch his things.

Li Guocheng opened all the windows and doors, sat in the middle of the laboratory, and closed his eyes in silence.

"Brother Li, please have tea." I don't know how long he had been here, but a low voice woke up Li Guocheng.

Looking up, he saw Zhang Zhijing holding her tea cup in both hands, standing quietly beside her, with a gentle smile on her face.

"Old Li, it's time to slow down. If it doesn't work, just rest for a few days and come back again." Wu Liankui led the way, and several acquaintances from the laboratory walked in.

"Yes, work is important, but health is more important," Master Yi said with a worried look on his face.

Others chimed in.

Li Guocheng was deeply moved. He didn't do anything, he was just a little too involved, which made everyone so worried.

In fact, he himself is not aware of it, and everyone else knows it well. The spiritual pillar of the laboratory is Li Guocheng. As long as he is okay, the laboratory will get better and better, and the results will be more and more.

"Don't worry, I took a good nap and now I'm resurrected with full blood," he said while sitting down to show off his muscles.

"Xiao Li, the days are long, there is no need to rush." ​​Wang Gong stepped forward and patted Li Guocheng on the shoulder.

Li Guocheng nodded and promised not to do this again before everyone left one after another.

Li Guocheng walked to the sample, read all the records, and classified and analyzed them in his mind.Suddenly he slapped himself on the head. He had hit a dead end in the past, always trying to control the magnification of each level.

But the characteristic of transistors is that the current amplification factor of each transistor is different, and the difference sometimes reaches an order of magnitude.Why do we have to burn all the resistors onto the chip? Pull out a resistor for each stage and place it outside the chip. Then directly adjust the resistance of this resistor. Then you can control the amplification factor of each stage.

Just do it as soon as you think of it, and an hour later, beautiful music came from the radio.

Li Guocheng did a backflip on the ground and kept waving his arms, "yes, yes,...".

Although the next work is not easy, it is only a matter of time, which is to compress the chip area and reduce costs.

With the support of telekinesis, this work only took three days, and the chip was compressed to the size of a soybean. When it was finally packaged, it was packaged as DIP-16 according to the custom of later generations.

Looking at the familiar chip in his hand, Li Guocheng is full of achievements.

After admiring it for a while, Li Guocheng redesigned the circuit board, including three-dimensional modeling, layout, engraving the substrate, dispensing glue, welding, wiring, and testing. The process was very familiar. He put the circuit board into the original radio box and connected the buttons.

Install the battery, turn on the switch, adjust the channel, and a Peking Opera excerpt from "Taking Tiger Mountain by Wisdom" comes out.

Taking the radio, I walked all the way to Wu Liankui's office.

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(End of this chapter)