He had a lot of specific circuit diagrams of digital phone chips in his mind, and he chose a single-chip telephone master control chip designed by Huatai Company in 02.

This phone master control chip can well support LCD display, caller ID, call storage, dial storage, 200 commonly used number storage, multiple phones in parallel, and three kinds of call music.

There are so many features, and in terms of hardware parameters, the operating voltage of this chip is as low as only 1.5V, which is far lower than the 20V standby voltage and 48V usage voltage of the telephone line.

The chip is capable of squelch input during dialing and can achieve a wide range of transmit and receive amplifier gain by external resistors for a better high-fidelity call experience.

Due to the high level of integration, this chip can make the whole digital telephone very reliable and have a long service life.

Although the chip technology is very mature, Yang Jie still wants to castrate some functions that seem unnecessary now, after all, some technologies and protocols are not needed for digital phones now, which greatly reduces the workload of drawing these circuit diagrams.

Yang Jie originally wanted to use his computer to draw these circuit diagrams, but the computer was not loaded with the corresponding drawing software.

But this also bothered him, he spread out the manuscript paper, picked up the pencil and began to draw, and began to design the peripheral circuits of the chip.

Hand-drawn chips are not an unusual thing now, when Zilog's Fagan designed the Z80 microcontroller, he drew all the circuit diagrams by hand with a pencil, and it took 80 hours to finally draw all the drawings.

Moreover, Yang Jie found that his memory had become very perverted after his rebirth this time, and all kinds of technical information and many things in his previous life were stored in his mind very clearly, without a trace of omission.

With his super memory, Yang Jie put pen to paper, and the design drawings were drawn very quickly.

"Damn, I'm just taking a shower, and you've written so many things?"

Zhang Yujie, who came back from taking a shower, saw Yang Jie writing hard there, and he couldn't help but say in surprise when he saw that Yang Jie had written several A4 letters.

"I'm getting excited about drawing right now, don't interrupt my train of thought. Yang Jie said.

Zhang Yujie picked up a few written sheets and flipped through them, he felt like he was reading a book from the sky when he saw these complex circuit diagrams, and finally put down the letter paper in a dejected manner.

He often comes to Yang Jie's house, and he is very familiar with turning out a few comic books and lying on the bed.

Yang Jie didn't have time to pay attention to Zhang Yujie, he couldn't hold back his pen now, and he drew more than 20 drawings in a row before stopping.

Looking at the time, it was already more than four o'clock in the morning, Zhang Yujie had already fallen asleep, Yang Jie yawned, went to the bathroom to wash his cough, and then went back to the room and fell asleep.

Yang Jie slept until more than ten o'clock in the morning before getting up, Zhang Yujie had already gone to school, and he was left alone at home.

He ate something and then continued to draw.

By the afternoon, Yang Jie had already drawn more than half of the circuit diagram of this chip.

When it was time for dinner, her mother Cai Wenya knocked lightly on the door and pushed the door in: "Xiaojie, it's time to eat." ”

"Oh, right away. Yang Jie put down the pencil in his hand at this time.

"What are you drawing?" Cai Wenya also saw the drawing of a piece of paper on Yang Jie's desk, and asked curiously.

"Drawings of the master control chip of a single-chip phone. ”

Cai Wenya was stunned for a moment: "What are you painting these for?"

Yang Jie's Lao Tzu usually draws some circuit diagrams, although Cai Wenya can't understand it, but she is also accustomed to it, and when she saw that her son was also drawing these circuit diagrams, she was surprised at first, but she didn't feel that she couldn't understand it.

"Mom, these are all treasures that I painted, and they can make a lot of money. Yang Jie said with a smile.

"It's better for you to go to a good university than anything else. Cai Wenya said.

"Mom, today's college students can't design chips like I do. He smiled and didn't argue with his mother.

At this time, the door outside opened, and Yang Minghui, who was holding a briefcase, walked in with a happy face, humming a little song in his mouth.

"Dad, so happy, what good happened?" Yang Jie asked with a smile.

Yang Minghui saw the playful look in his son's eyes, and glared at him angrily.

After dinner, Yang Jie said to Yang Minghui: "Dad, I designed the chip drawings of this digital phone, and the drawings are almost finished, come and take a look." ”

"You're still a high school student, so you don't know how to design chips. Cai Wenya said.

"Wife, it seems that you still don't know about your son's ability!" Yang Minghui said with a smile, if it was before, he would never believe what his son said, but last night Yang Jie's level of programming technology, even he, the old man, can only be out of reach, and he no longer dares to underestimate his son.

Now he is also extremely curious, and he also wants to see what kind of chip his son has designed.

"Well, you still drew it with a pencil?" Yang Minghui said when he saw the drawings handed to him by his son, but judging from the drawings, the layout of the circuit diagram was concise and clear, and he was even more surprised if he couldn't draw such drawings without a few years of hard work.

"I also wanted to draw it with PROTEL software, but I didn't have it on my computer, so I had to draw it by hand. ”

"WELL, DO YOU KNOW PROTEL SOFTWARE?"

"Dad, look at the drawings carefully!"

Yang Minghui then looked at these drawings carefully, "It's quite like it......" When he saw the IP core design drawings, his eyes were staring at the drawings very intently.

"What about the other drawings of this IP core?" Yang Minghui asked with an excited look on his face at this time.

"I haven't finished painting yet, so I should be able to draw it all tomorrow. ”

Yang Minghui looked tormented at this time, he looked at a few design drawings of the IP core, and knew that the circuit diagram layout was very reasonable, and there was no need to modify it at all, which was not like a high school student could make it up, but like a designer with at least decades of chip design experience.

He had also seen the chip design drawings provided by Huatai before, and the chip designed by his son was more than one grade higher than their designers in terms of integration and layout!

"Son, you didn't copy the design of this chip from foreign chips, did you?" asked Yang Minghui.

"Dad, these are all drawn by myself, exclusive patents. Yang Jie said with a smile.

Yang Minghui couldn't understand why his son suddenly designed such a chip drawing, he was shocked, he was still a little uneasy, put down the drawing in his hand and said: "I asked XCMG to come over, his chip technology is stronger than mine, I'll let him take a look!"

Not long after, Xu Shaoqiu also came over in a hurry, and Yang Minghui took him to Yang Jie's house: "XCMG, you know IC better than me, can you help me see if the IP core designed by my son infringes on the patents of other companies?"

Xu Shaoqiu pushed his glasses, and also carefully looked at the IP core drawings designed by Yang Jie, after he looked at them a few times, the expression on his face became excited, and those who grabbed the drawings trembled a little.

After reading a few drawings in his hand, he looked at Yang Jie excitedly and said, "What about the rest of the drawings?"

"This kid hasn't finished painting yet. Yang Minghui also asked excitedly: "XCMG, what do you think?"

"Director Yang, your kid is really a genius! According to my understanding, even those foreign telecom giants have not designed such an IP core, this is really an exclusive patent!" Xu Shaoqiu said excitedly at this time.

Yang Minghui also looked at Yang Jie with excitement on his face at this time, and he didn't know what to say for a while.

"Xiaojie, hurry up and draw out this IP core drawing, this can be applied for a patent from the state. Xu Shaoqiu said.

"Son, dad has something to discuss with you. Yang Minghui's eyes flashed at this time and said.

"Dad, do you want me to transfer this patent to Huayue Electronics Factory?" Yang Jie asked with a smile.

"You're a goblin. Yang Minghui sighed and said.

"Dad, this chip technology patent can be transferred to Huayue Electronics Factory, after all, the chip still needs to be tested and taped out, and I can't do these things alone. ”

Yang Jie said with a smile: "However, the technology transfer fee given to me by Huayue Electronics Factory cannot be less than mine, and my name must be written on the technology patent." ”