To design the entire internal structure of a mobile phone from scratch, it is usually designed by multiple professional designers, such as antennas, cameras, sensors, and motherboards, and each part of the structure needs a designer to improve and fine-tune. [Full text reading]

For example, the chief designer of Xue Daqing should solve the overall overall design, and then assign the approximate location of each component to each designer, and different designers will deal with their own components.

This will be very efficient, but at the same time, if there is a problem with one side, it will affect the whole thing, such as the structure of the antenna, the wire, or the thickness and shape of the fuselage.

Wang Wei is responsible for the wire stepping, which sounds very simple, but it is extremely difficult to know that in the case of fixed size and component position of the fuselage, it is extremely difficult to connect each component to the motherboard, and then separate it from the antenna, and at the same time to estimate the heat dissipation and structural stability.

From design to implementation, the middle is extremely complicated, and it takes countless experiments to design Wang Wei's plan for more than 1 month, which is the third version she came up with, but she didn't expect that there were major data errors......

There are only a few days left, and it is simply not enough to push it all over again, and the only way is to compromise by deepening the thickness of the fuselage...... However, the body of the mobile phone is every inch of land, even if it is thickened by one millimeter, it will affect the appearance of the entire mobile phone.

This makes the already competitive and incentivized bidding scheme even less hopeful.

This is also the reason why Wang Wei is so desperate and others are extremely angry, looking at the helplessness and despair on everyone's faces in the office, Liu Shishi couldn't help but pull Gu Xiaofan's sleeve and said:

"You can help her figure it out."

"Well, I'll take a look." Gu Xiaofan's heart moved: "I'm worried that I don't have a chance to show the future mobile phone design, just practice my hands, anyway, this line shouldn't be difficult." ”

This made Wang Wei a little ridiculous, this little director really thought that what she did was simple, and he wanted to make up for it himself......

Gao Yuanyuan also frowned and asked Liu Shishi: "Wang Wei is a designer who came back from studying in the United States, you asked Gu Xiaofan to help...... You can figure it out. ”

"I think he can do it." Liu Shishi snorted and said: "He has loved to tinker with all kinds of electrical appliances since he was a child, and he used to repair the TV and refrigerator at home, and he must have no problem with the circuit." ”

Looking at Liu Shishi's "what do you know" look, Gao Yuanyuan was also a little speechless, thinking about repairing TVs, can refrigerators be compared with fine machinery like mobile phones......

Gu Xiaofan had just learned some knowledge of the internal structure of the mobile phone through Sirui before, and after reading a lot of future design drawings, he couldn't help but feel a little itchy, so he began to carefully observe some details of the structure of the mobile phone components, and at the same time opened the screen in his mind, whether there were suitable details in his mind.

This mobile phone is the same as the iPhone, it is a 3.5-inch large screen, and many internal structures are plagiarized from the iPhone, but unlike Apple's international large enterprises, Honor cannot customize the meta parts, so under the same structure, the design ideas must be fine-tuned.

With such fine-tuning, the whole idea changes, and it is several times more difficult for the internal step.

Gu Xiaofan looked at the disassembly pictures of many mobile phone evaluation videos in the future, and compared the pictures one by one, so that he didn't have to consume extra mental power, and wanted to find the most suitable solution.

But after a try, Gu Xiaofan found that things were far from being as simple as he imagined, first of all, it was necessary to route in the order of RF stripline and control line - baseband RF analog interface line (txramp_rf, afc_rf) - baseband analog line including audio line and clock line - analog baseband and digital baseband interface line - power line - digital line.

The most difficult part is the clock line, where the 13MHz crystal U108 and quartz crystal G300 are part of the noise-sensitive circuitry, and the signal traces must be minimized underneath.

The two terminals osc32k_in and osc32k_out should be flattened, and the closer to the D300 the better. The input and output lines of the 32k clock must not be crossed......

In these steps, as long as there is a slight deviation in the line, it will cause various circuit problems in the system......

At this time, Xue Daqing also came back after sending Xiaoyu, and when he saw that the office was depressed, he also asked what happened, and Wang Wei hurriedly came over to apologize.

After hearing what happened, Xue Daqing was not angry, just sighed and patted Wang Wei's shoulder and comforted: "Just pay attention next time." He sat back in his office.

This surprised everyone and wondered, why didn't Xue Daqing get angry?

In fact, only Xue Daqing, who was looking at the ceiling in a daze, knew that there was a huge problem with the overall design of his mobile phone this time, that is, the problem of antenna interference, so no matter how perfect the mobile phone structure of the following departments was, it was impossible for them to win the bid this time.

He also knows that Huawei actually doesn't count on them at all, there are more than 10 companies in this OEM bidding, and their glory strength is ranked last.

Anyway, Huawei only values these people, and when this bidding fails, Huawei will eliminate a large part of it, and then absorb the excellent into the group headquarters, to put it bluntly, he Xue Daqing just wants to repay his debts and sell himself...... At that time, this glorious company will also cease to exist.

Xue Daqing thought of this, and a feeling of powerlessness swelled in his chest, and now he didn't have to stay up late to try to solve the antenna problem...... There's no hope anymore anyway.

was in despair with his eyes closed, and when he saw Gu Xiaofan, he rushed in with interest, holding the design drawings and asking:

"Xue Gong, you look at this wiring diagram, if the RF stripline on my side goes to the left, will it affect the heat dissipation?"

Xue Daqing glanced at it a few times, explained a few sentences, and then suddenly reacted and said in surprise: "You came up with this plan yourself?" ”

How is this possible, Gu Xiaofan actually designed a new set of step line plans from scratch.

Gu Xiaofan nodded, didn't have time to explain, and then turned around and continued to work.

At this time, Xue Daqing had unconsciously followed, standing next to Gu Xiaofan and watching him work, Wang Wei also felt that something was wrong, and also came over, and the two of them opened their mouths slightly while watching.

These designs painted by Gu Xiaofan are unheard of by them, even if it is Motorola, Nokia has no precedent for these wiring methods.

Gao Yuanyuan next to him was surprised: "Scared...... What are they doing, it seems that Gu Xiaofan is doing a good job? ”

Liu Shishi snorted and said as a matter of course: "I just said, Gu Xiaofan can handle something as big as a TV and a refrigerator, what is this little mobile phone." ”

Gao Yuanyuan glanced at her speechlessly, thinking that this fierce girl was really digitally blind......