The rise began in the seventies!

Wu Tianming didn't care what others thought of him.

When he found Li Huiru, he just nodded slightly, still unable to hide the smile on his face.

When he saw Ye Zhao, he was stunned.

"Are you Mr. Ye?"

He said a little uncertainly.

After all, he had only seen it in the newspaper.

Li Huiru stood up and nodded,"Yes."

Wu Tianming's eyes lit up immediately. He immediately dropped the things in his hands and moved to the side of Ye Zhao.

"Mr. Ye, your idea is really great."

"The telegraph transmits text"

"A pager is like a smaller, simpler version of a telegraph machine that can only receive messages!"

"But you can actually think of using analog signals to convert them into voice transmission"

"The idea of being compatible with text transmission is simply beyond imagination."

"Why didn’t anyone think of this before?"

"Why didn't I think of that?"

Wu Tianming praised Ye Zhao without hiding his feelings.

At the same time, he felt annoyed and frustrated by the limitations of his own thinking.

Then he continued

"But it doesn’t matter!"

"Your genius idea plus my genius design!"

"As long as Transsion Microelectronics can make it, it will certainly be bigger than before."

"But definitely not much bigger"

"This product will definitely be an epoch-making product!"

Wu Tianming said excitedly, very confident.

Ye Zhao certainly knew that this was an epoch-making product.

In fact, in the field of mobile phones, that is, big brothers, there has been research in this area since a long time ago. In the

1950s and 1960s, some people in Russia achieved mobile communications within a certain area.

But the restrictions were too great.

And the promotion was very slow.

It was not until the 1970s that Motorola developed a real mobile phone.

But at that time, the mobile phone weighed four kilograms and was more than 1 kilogram.

It could be moved, but it was not completely moved.

In fact, Ye Zhao proposed that the compatibility of telephone and text transmission is two different working principles.

That's why Wu Tianming was so excited.

In terms of telephone analog signals, it is more like a radio station.

But this radio station is two-way.

Using analog signals, the signal transmission between two Smile radio stations is carried out.

Then it is converted into voice calls.

However, in fact, the confidentiality of such transmission is very low.

With certain skills, you can directly eavesdrop.

Later, the conversion and transmission of digital signals were gradually connected.

Only then did the confidentiality get greatly enhanced.

Because the definition of digital signals is the high and low levels from analog signals.

To put it bluntly, there are too many analog signals, which will be affected by the voltage amplitude.

Even the specific meaning may be misinterpreted.

This is also when mobile phones were popular. People were often seen pulling antennas and shouting everywhere.

Because the communication quality could not be guaranteed enough, it was often interfered.

But digital communication is different.

Only 0v voltage and 3.3 volt voltage are used, and there are only two states.

0v voltage is low level.

3.3v and above is high level.

Of course, this is a perfect state, and there will definitely be some deviations in actual operation.

To put it more bluntly, 0v voltage means no signal.

3.3v high level means there is a signal.

When only these two states are used as signal sources, the call quality is guaranteed.

There are just too many analog signals and they are easily interfered with. Digital signals actually developed very early, and Morse code is actually a kind of digital signal.

But because the electrical signal technology was relatively backward at the time, it has been stagnant.

Until the advent of the telephone.

But it has always been wired digital signal transmission.

Unlimited digital transmission is a test of the conversion of integrated circuits.

So Ye Zhao now proposed two functions, communication and text input on bb.

But in fact, the difficulty is still relatively large.

At present, the direction of early calls can only be analog signals first.

Let's talk about it first.

The information transmission of the pager actually belongs to a certain concept of digital signals.

But there is no way to make the call channel into a digital signal.

It is equivalent to two systems appearing in one machine.

And they must be compatible.

So when Wu Tianming said that he designed that integrated circuit, you would think how talented he is.

The two modes are switching at any time.

They do not interfere with each other, but they are operating steadily at the same time.

This is very difficult to do.

If digital calls are fully realized, it would be simpler.

"very nice"

"But you actually wasted a lot of energy on this aspect."

Ye Zhao said with a smile

"Ah? Waste? Why is it a waste?"

Wu Tianming was stunned for a moment.

"You design a switching conversion circuit that is compatible with both systems"

"But have you ever thought about converting voice calls directly into digital signals?"

Ye Zhao said with a smile.

To put it bluntly, the key to this thing is the performance of the integrated circuit.

If there is a technological breakthrough, it will be realized soon.

"That makes sense."

Wu Tianming frowned and thought about it.

"This is the design idea you should have in the future"

"This is enough for now!"

"This is our first mobile phone product."

As for the signal receiver, Ye Zhao has also been asking people to do research and breakthroughs.

The size of the mobile phone is largely due to the power supply.

The second reason is that the antenna will also be compatible with it.

The power supply is currently limited by battery technology, and there is no way for the time being.

However, efforts can be made in the signal receiver.

Not to mention that it is completely different from the 21st century, and the antenna cannot be seen at all.

But at least it should be smaller, and to a certain extent it will not damage the call quality.

This is the first generation of mobile phones!

That is the 1g era!

After giving Wu Tianming an idea, Ye Zhao went back directly.

……

Selling mobile phones definitely requires upgrading the base station.

If it was just a pager, it would be fine.

The impact would not be significant.

However, after the upgrade, voice information transmission is involved.

It is more sensitive.

As expected, a few days later, Xiao Zhiming brought someone to the door.

"Mr. Ye, your move is too big"

"We can't keep up with you."

Xiao Zhiming shook his head and said

"This person is from the Ministry of Industry and Information Technology. You should know what he is here for by listening to his name, right?"

Xiao Zhiming said

"I know, someone is here to build a base station for me."