Riding the wind of rebirth

The so-called radio frequency card is actually an induction antenna connected to the IC chip and packaged in a standard PVC card.

Previous IC cards had to be contacted through metal contacts to power the IC card's internal chip, and then the IC card could work. This made the design of the card reader and the wear and tear of the contact points a huge problem.

Combining radio frequency identification technology and IC card technology ends the two problems of passive and contact-free. The card only needs to be close to the surface of the reader at a certain distance (usually between 5-10cm), and passes through the radio waves. The data reading and writing operations can be completed by passing.

This technology has become a major breakthrough in the field of electronic devices.

However, this technology itself is not difficult. Its working principle is to send a set of fixed-frequency electromagnetic waves to the IC card through a radio frequency reader and writer. There is an LC series resonant circuit in the card, and its frequency is the same as that emitted by the reader. The frequency is the same.

In this way, under the excitation of electromagnetic waves, the LC resonant circuit resonates, so that there is charge in the capacitor; at the other end of the charge, there is a one-way electron pump, which sends the charge in the capacitor to another capacitor for storage. When the accumulated charge reaches two volts, this capacitor can be used as a power source to provide operating voltage for the circuit in the card, allowing the card to start working.

Radio frequency encryption card is the simplest radio frequency card. A set of fake secret information is solidified in the card as ID verification. Most simple cards, such as meal cards used in schools, access control cards, etc., fall into this category.

Radio frequency memory cards are more complicated and involve information access. It adds a radio frequency transceiver circuit to the memory card and has the simple function of updating the data in the card. The bus cards used in some early cities in later generations, and the upgraded meal cards and hot water cards used by some schools fall into this category.

The most complicated one is the radio frequency CPU card. The chip of this card has its own operating system COS, which is equivalent to a simple computer with reading, storage, computing and other functions. This kind of card can be called a real smart card. All-in-one bus cards in large cities, financial IC cards used by banks, meal cards in a few schools, meter cards in power systems, etc., are radio frequency CPU cards.

It sounds very high-end, but the protocol for CPU cards has been introduced as early as 1988. Although COS is not a unified universal system, each card manufacturer has its own core operating system instruction set, but the protocol it follows, It is still the version of the General Unification Agreement specified in 1988.

In the life before Zhou Zhichuan came, because the research on operating systems started too late, CPU cards could only be manufactured abroad, making a lot of money in the Chinese market every year.

Of course, this situation does not exist now. The instruction set of the CPU card itself is not that complicated. The key is that several card manufacturers have blocked other people's research and development paths through technology patent monopoly, leaving people with no way out.

MiniCOS developed by Clover Company filled this gap in domestic software technology. The operating system of the CPU card could only be regarded as a subtractive transplantation of MiniCOS, which was quickly overcome by the company's expert team.

Then there are registered patents all over the world.

"But it seems that other countries are not very interested in this, even though we are the first." Zhang Wen said.

"It's best not to be interested." Zhou Zhi smiled and said: "Anyway, we are just setting a threshold. The huge domestic market will currently cause production pressure, and we can't take care of the outside world."

"When we are able to go out in the future, at least in terms of radio frequency CPU cards, we will be able to compete on the same starting line as foreigners."

When Zhang Wen heard this, he suddenly felt that Zhou Zhi was a bit like what the chairman said. This child is not simple.

Zhou Zhi then asked: "The chairman and I have suggested many application scenarios. We won't just implement this access control in the end, right?"

"Of course not." Zhang Wen said cheerfully: "Our access control also functions as a meal card. In addition, the chairman is in contact with several banks, as well as power, transportation and other departments. At present, it has basically been finalized to provide smart power to the Shanghai Electric Power Company. Electric meter, prepare to cooperate with the high-meter metering company of Belling Group."

"There are also non-contact bus IC cards, university student service cards and other projects." Zhang Wen continued: "We have signed agreements with several universities in Shanghai, and we are still negotiating with the transportation side."       "Various application scenarios , the cards used are different, which is why the chairman decided to produce three types of cards at the same time." Zhang Wen said with a smile: "This way, people can be rich and frugal!"

While talking, the two of them had already walked through the small square in the center of the building and arrived at the entrance gate of the office area. General manager Xiao Qianwei and public relations team leader Liao Hongxing greeted them.

Xiao Qianwei stretched out his hand and smiled warmly: "Mr. Zhou, I have admired him for a long time. He is really a promising young man. He is too young."

"I'm Liao Hongxing. We've spoken on the phone many times." When Zhou Zhi shook hands with Xiao Qianwei, Liao Hongxing also extended his hand: "It sounded fine on the phone, but I was really shocked in person."

"Mr. Xiao, Mr. Liao, hello." Zhou Zhi smiled and said, "Excuse me for waiting. I should have called."

"Fortunately not, the taxis are even slower." Liao Hongxing said with a smile: "The morning rush hour traffic in Shanghai is very heavy now, but the buses still have dedicated lanes. We all prefer to take the commuter bus."

"Really?" Zhou Zhi said in surprise: "Shanghai is really a big city. It strives to be first in everything. Even the traffic jams in the morning rush hour appear first."

Everyone entered the elevator with a smile and soon arrived at the chairman's office on the top floor of the fifteenth floor.

Hu Changfeng still retains the characteristics of the ministry. The office layout is similar to that of that time. It is mainly simple, with a coffee table and sofa for receiving guests, a large desk, two chairs in front of the desk, and a large seat behind the desk. chair, and a row of bookcases behind it.

But now there are two machines, large and small, on his desk. A middle-aged man wearing the same white coat as Liao Hongxing was nervously debugging the machine. It was Xu Wangting, the engineering technology implementer mentioned by several people before.

"Here comes the elbow?" Hu Changfeng was very happy to see Zhou Zhi.

"Uncle Hu, thank you for waiting for a long time." Since Hu Changfeng called him elbow, Zhou Zhi had no choice but to address Hu Changfeng with the etiquette of meeting an elder.

"No, no," Hu Changfeng waved his hands: "We have just arranged it here. This is Xu Wangting, our group's engineer. These two digital players based on multimedia decoding chips are his designs."

"Hello, Gong Xu, thank you for your hard work." Zhou Zhi shook hands with Xu Wangting: "Congratulations, you have developed the equipment."

"Let's introduce it while experimenting." Hu Changfeng said: "Today is just a preliminary results acceptance meeting, and then Jiuzi will give us suggestions for improvement."

"Then let me introduce it with Gong Liao. Gong Liao will introduce the chip first, and then I will introduce the engineering machine." Xu Wangting said.

Seeing Hu Changfeng nodded, Liao Hongxing said: "After receiving the codec protocol and design requirements from Clover Company, we specially designed the two current chips."