Chapter 1293 IC Card and Chip
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 in contact with metal contacts to supply power to the chip inside the IC card, and then the IC card could work. This made the design of the card reader and the wear of the contact points a huge problem.
The combination of 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 reader at a certain distance (usually between 5-10cm) On the surface, data reading and writing operations can be completed through the transmission of radio waves.
This technology has become a major breakthrough in the field of electronic devices.
However, this technology itself is not a difficult one. 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 this charge, there is a one-way electron pump connected to send the charge in the capacitor to It is stored in another capacitor. When the accumulated charge reaches two volts, this capacitor can be used as a power supply to provide operating voltage for the circuit in the card, allowing the card to start working.
RF 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.
RF memory cards are a bit more complicated, involving 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 is called The above are real smart cards, including 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., which 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 Zhi 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 today. 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 has filled this domestic software technology gap. The operating system of the CPU card can only be regarded as a subtractive transplantation of MiniCOS at best, and it 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 said with a smile: “Anyway, we are just setting a threshold. The huge domestic market will currently cause production pressure, and we can’t worry about the outside world.”
“Wait until the future. When we have the ability to go out, at least in terms of radio frequency CPU cards, we have the ability to compete on the same starting line as foreigners.”
When Zhang Wen heard this, he suddenly felt Zhou Zhi was a bit like the chairman. As I said, this baby 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. We are preparing to cooperate with Belling Group’s electric meter metering company.”
“There are also projects such as contactless bus IC cards and university student service cards.” Zhang Wen continued: “Already. Agreements have been signed with several universities in Shanghai, and the transportation side is still negotiating. "Various application scenarios require different cards, 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 came to the entrance gate of the office area. General Manager Xiao Qianwei and the public relations Team leader Liao Hongxing came forward.
Xiao Qianwei stretched out his hand and smiled enthusiastically: "Mr. Zhou, I have admired you for a long time. You are really a promising young man. You are too young."
"I'm Liao Hongxing. We have 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 when we met."
"Mr. Xiao, Mr. Liao, hello." Zhou Zhi smiled and said, "Excuse me for waiting. I should have called."
"Fortunately not, the call was slower." Liao red Xing smiled and said: "The morning rush hour traffic in Shanghai is severe now, and the buses at least have dedicated lanes. We all prefer to take the commuter bus."
"Really?" Zhou Zhi said in surprise: "Shanghai It is indeed a big city, and we strive to be first in everything, even the traffic jams in the morning rush hour."
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, you've been 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 hand: "We have just arranged it here. This is Xu Wangting, engineer of our group. These two digital players based on multimedia decoding chips are his designs. ”
"Hello, Xu Gong, thank you for your hard work." Zhou Zhi shook hands with Xu Wangting: "Congratulations, you have developed the device."
"Let's introduce it while experimenting." Hu Changfeng said: "Today is just a preliminary step. After that, Zhuzi will give us suggestions for improvement."
"Then I will introduce it with Gong Liao. Gong Liao will introduce the chip first, and then I will introduce the engineering machine."
Seeing Hu Changfeng nod, Liao Hongxing said: "After receiving the codec protocol and design requirements from Clover Company, we specially designed the two current chips."
( End of chapter)