As Jiang Ning answered this question in simple terms, the face of Zhang Sanshi, the software supervisor, Zhang Chenglin, the maintenance supervisor, changed, and the structure supervisor Wu Xiaowei's face also changed slightly......

Bi Zhonghua showed a cheap smile, Zhang Min's beautiful eyes flashed with a touch of brilliance, Cao Jianwei couldn't help but secretly give Jiang Ning a thumbs up in his heart, and the colleagues in the other hardware departments, while sighing out, couldn't help but look at Jiang Ning with admiration. Pen "Fun" Pavilion www.biquge.info

Everyone present, regardless of whether they understood this question or not, after hearing Jiang Ning's response, couldn't help but be deeply impressed by Jiang Ning's in-depth explanation, lifting weights like light, and being light-hearted, and in the end, they were very free to give the software director Zhang Sanshi a small counterattack.

If Bi Zhonghua and Cao Jianwei were asked to answer this question, they would definitely be able to answer it, but if they wanted to make such a 'coquettish' reply as Jiang Ning, they couldn't do it if they asked themselves.

was asked by Jiang Ning just now, and Zhang Sanshi, the software director who had a fever on his face, don't mention the depression in his heart, he is a very proud person, and he only teaches others on weekdays, like now, being slapped in the face in public by Jiang Ning, a raw melon egg who has just graduated for a year, seems to be the first time in his life, which can't help but make him feel a little embarrassed for a while.

However, he is proud of himself, he still has a set of control over his emotions, he knows that at this time, his mood must not be chaotic, otherwise, this time the plan to make Jiang Ning ugly in public completely failed, not to mention, he will be slapped in the face, this kind of business that loses his wife and folds his soldiers, he Zhang Sanshi doesn't want to do it.

So, after he worked hard to calm down, his mentality finally gradually adjusted, and he now knows that I am afraid that this Jiang Ning, who is useless in his eyes, is not such a straw bag, and he also has some inventory in his stomach, so at this time, he also began to face Jiang Ninglai.

"Hehe, Deputy Director Jiang, you can even explain this question to me so thoroughly, amazing, really amazing!"

Zhang Sanshi avoided the important and trivial, did not respond to himself, a software engineer, why did he ask a question that was greatly related to software, but greatly praised Jiang Ning, transferred the contradiction, and then continued to speak: "Deputy Director Jiang, when I was learning the knowledge of mobile phone hardware, I was not very clear about the hardware of mobile phones, how many modules are constituted, can you explain it to me?"

Regarding Zhang Sanshi's second question, Jiang Ning didn't think about it and said lightly: "The composition of mobile phone hardware can generally be divided into: radio frequency part, audio part, baseband part, and peripheral circuit part, these four major parts, I think, in the architecture of your software, there should also be, right?"

After Jiang Ning easily responded to the other party's question, in the end, he still did not forget to give the other party a small counterattack, in this regard, the software director could only smile while blushing, and continued: "In terms of radio frequency of this mobile phone, the frequency band of 2G signal, the frequency band that is often tested, I don't know what they are?"

When Zhang Sanshi raised this question, many people in the hardware department were straight-eyed, because many of them had never even heard of this, obviously, this was a relatively remote problem.

Indeed, the question Zhang Sanshi asked is actually a question about 'hardware testing'!

Hardware testing is carried out by special people, they will test all aspects of the mobile phone circuit board to determine whether it is normal, one of which is the 'mobile phone RF test', in this test, including the test of the 2G signal band.

Bi Zhonghua and Cao Jianwei and other senior hardware engineers couldn't help but be slightly surprised, they didn't expect that Zhang Sanshi, the software director, would ask such an in-depth question in terms of hardware.

Zhang Chenglin, the head of the maintenance department, and Wu Xiaowei, the director of the structure, saw some hardware engineers in the hardware department, and they looked confused, and they knew that the question asked by Zhang Sanshi must be another kind of partial problem, and they couldn't help but look at Jiang Ning to see how he responded.

Zhang Min and everyone in the hardware department also looked at Jiang Ning with slight concern.

There is almost no difference from before, Jiang Ning's face is still a breezy look, and he just smiled slightly at Zhang Sanshi's question, and immediately responded: "850, 900, 1800, 1900, if I'm not mistaken, among the 2G signals, those hardware testers often test these four frequency bands." ”

"They will test the power of these four frequency bands, as well as parameters such as sensitivity, in order to judge the radio frequency of this mobile phone, whether it is the best state, Brother Sanshi, I don't know what I answered, are you still satisfied?"

Jiang Ning's rhetorical question made Zhang Sanshi come to a roast chicken nest neck, he laughed dryly, and said: "Deputy Director Jiang is really powerful, then, let me ask again, I don't know what types of mobile phone audio exercises there are?"

Jiang Ning didn't hesitate at all, and opened his mouth to answer, "Class AB, Class K, and Class D!"

"What is the core of the baseband part?" Zhang Sanshi was a little difficult to ride a tiger, and immediately gritted his teeth and asked.

"Of course it's the CPU, everything revolves around it, not only the baseband part, even the entire mobile phone, this CPU is also its core!"

"What are the peripheral circuits!" Zhang Sanshi asked without the slightest hesitation.

Jiang Ning is still breezy and eloquent, "The peripheral circuit is actually a general term, and the part it contains, strictly speaking, is not fixed, but, in general, the peripheral circuit includes the mobile phone screen interface circuit, camera interface circuit, motor and button, and even the circuit of the flash and so on!"

"What are the wiring methods between the mobile phone screen and the camera!" Zhang Sanshi was a little anxious, for such a long time, let alone ask Jiang Ning, even if it was a question that made the other party think about it for a while.

For the question thrown by Zhang Sanshi, Jiang Ning still did not hesitate, just opened his mouth and said: "Serial port, parallel port, and MIPI interface, today's smart phones, almost all use this MIPI connection, it not only has a fast transmission rate, but also has a strong anti-interference ability." ”

"Why is a one-way diode added to the motor circuit?" Zhang Sanshi was already sweating a little, and his problem was almost solved.

However, Jiang Ning was still not in a hurry, and immediately replied: "This is naturally to prevent the current backflow of the motor!"

Wow, yes, your sister, why can't I ask you, my mother sells batches!

Zhang Sanshi, the software director, was annoyed in his heart, but he still searched his stomach to find a problem, "Deputy Director Jiang Ning, may I ask, what is the principle of the mobile phone button?"