Universal encoding-decoding and read-write device for non-contacting IC card

Abstract

A universal coding / decoding and reading / writing device of non-contact IC card consists of antenna regulation circuit, synchronization / clock circuit, micro-processing controller, PCD / VCD command frame modulation and control circuit, PCD / VCD command frame coding circuit, PICC / VICC RF signal detection / interference removal / analog signal processing circuit, coding signal interference processing circuit, PICC / VICC coding signal digital quantitative process / interference removal circuit, coding signal processing circuit. PICC / VICC coding signal demodulation-process circuit and PICC / VICC data output circuit. Its coding / decoding and reading / writing method is also disclosed.

Description

technical field [0001] The invention relates to a universal encoding / decoding / reading and writing device for IC cards, in particular to a general encoding / decoding / reading and writing device for a non-contact (Radio Frequency Identification, RFID) IC card based on a 13.56MHz frequency point. Background technique [0002] The non-contact IC card system based on 13.56MHz frequency is being widely used, including IC card electronic wallet application, urban public transportation industry, wireless communication field, health care industry, closed place management, identification, telephone communication, building security system and more. Especially in the banking service system, IC smart cards have gradually matured to serve the public instead of the old magnetic cards. [0003] At the same time, the electronic label market is heating up at an unprecedented rate. The electronic label market is different from the non-contact smart IC card (including contact smart card) market...

AI Technical Summary

Problems solved by technology

First of all, the versatility of existing IC card read-write chips is not strong enough, and the range of encoding and decoding capabilities is not wide enough. A read-write chip can only read and write one type of IC card. For example, the reader-writer of SONY company can only read and write IC card of SONYFelica technical standard

Secondly, the circuit power consumption of these read-write chips is not small enough, and the conversion efficiency of electromagnetic energy is not high enough.

Most of the read-write chips do not consider the energy consumption of the circuit under the premise of pursuing the integrity of the IC card read-write function, consume a large amount of electric energy and generate a lot of heat (for example, the MFRC500 chip current of the Philips company described The consumption can reach 150mA, but the peak current consumption of the designed circuit does not exceed 50mA), which makes the circuit work unstable, or cannot be directly connected to the USB power supply of an external computer, etc., thereby inhibiting the application and performance

Images