Abstract:
PURPOSE: A device for transmitting a power of a contactless card reader is provided to generate an electromagnetic wave for supplying a power and compensate a resonance frequency between a contactless card reader and each passive card according as a sensor circuit which is operated over a frequency operation range of the contactless card reader which senses existence and the number of passive cards. CONSTITUTION: A sensor circuit(41) senses an existence and the number of passive cards(30) using infrared rays or supersonic waves. If a signal for sensing the number of cards is inputted, a resonance frequency compensating circuit(42) outputs a resonance frequency compensating signal for compensating the passive card(30) and a contactless card reader(20a). If a card sensing signal and the resonance frequency compensating signal are inputted, a power control circuit(43) outputs a predetermined frequency generating signal for controlling a compensation of a resonance frequency between the contactless card reader(20a) and the passive card(30). If a switch of an interior is varied, a power generating unit(44) generates an electromagnetic wave for supplying a power. A matching circuit(45) combines the electromagnetic wave generated from the power generating unit(44) with an antenna(46) and outputs the electromagnetic wave to an exterior.
Abstract:
PURPOSE: A smart card emulator and an emulation method thereof are provided to effectively develop a contact/non-contact smart card and a USB(Universal Serial Bus) card through the simple design modification of a hardware logic. CONSTITUTION: The smart card emulator includes a computer(100), a controlling block(202), two ports(204,208), the first memory block(206), the second memory block(210), a clock generating block(212), a signal processing block(214) and an interface block(216). The controlling block(202) performs entire control needed to perform the emulation of the smart card. The first memory block(206) stores a VHDL(VHSIC(Very High Speed IC) Hardware Description Language) code needed to design the hardware logic. The second memory block(210) comprises an SRAM reading and writing the contents according to the execution of the emulator, a ROM storing an OS(Operating System) program of the emulator and an EEPROM(Electronically Erasable Programmable ROM) storing various application programs. The signal processing block(214) is an FPGA(Field Programmable Gate Array) for realizing a user defined additional function module.
Abstract:
A sensor tag comprises a tag chip which receives a driving voltage produced from an RF signal from a reader and transmits sensor data to the reader in response to a request from the reader; one or more sensors which receive a necessary driving voltage from the tag chip and measure the sensor data; and a micro controller unit (MCU) which receives the necessary driving voltage from the tag chip and transfers the sensor data measured from the sensors to the tag chip.
Abstract:
Disclosed are a display tag apparatus and a method for high-recognition capable of removing the reduction in tag recognition due to various physical phenomena, capable of preventing damage to a product in which a tag is attached due to a result of the non-recognition of the tag, and capable of reducing time consumption for recognition and confirmation by rapidly classifying the tags by confirming the recognition condition of an RFID tag with a binocular method by attaching the manual RFID tag to a power save type display. According to an embodiment of the present invention, a user is able to rapidly identify the information of the tag with the binocular method by attaching the RFID tag to the display, is able to identify the tag located within the recognition range, and is able to identify the color, symbol, text of the tag with the binocular method.
Abstract:
PURPOSE: An RFID(Radio Frequency Identification) reader, RFID tag, RFID communication method, and system thereof are provided to execute wireless communication through a serial communication protocol without using specific wireless communication protocols. CONSTITUTION: An RFID tag(220) includes tag information. The RFID tag provides interfaces by using a serial communication protocol. An RFID reader(210) reads the tag information by using the serial communication protocol from the RFID tag. The RFID tag includes a tag control module. The tag control module provides the RFID reader and the interfaces by using an I2C(Inter-Integrated Circuit) or an UART(Universal Asynchronous Receiver Transmitter).
Abstract:
A modular multiplier and a method thereof are provided to control a memory directly while continuously performing word-base modular multiplication process. A modular multiplying unit(220) repetitively performs a modular multiplication operation. A memory(230) stores one or more return values generated during the operation process. A modular interface unit(210) is synchronized with the modular multiplying unit by using one of the return values, stores values outputted from the multiplying unit in the memory, and then reads at least one value requested by the multiplying unit from the memory to provide the read result to the multiplying unit.
Abstract:
본 발명은 소정 주파수의 클럭 신호에 의해 동작하는 하드웨어 장치의 안전한 동작과 시스템의 신뢰성을 구축하기 위하여 상기 클럭 신호의 주파수의 이상을 탐지하는 주파수 센싱 장치에 관한 것으로서, 상기 장치는, 판별 대상인 클럭 신호의 적분 전압으로부터 상기 클럭 신호가 정상 주파수 범위보다 낮은 지를 감지하며, 상기 클럭 신호의 적분 전압의 비교 신호의 미분 전압으로부터 상기 클럭 신호가 정상 주파수 범위보다 높은 지의 여부를 감지하도록 구성된다. 클럭, 주파수 이상, 적분기, 미분기
Abstract:
A device for generating a true random number by using an oscillator sampling method is provided to generate a true random number at low cost with low power consumption while fast generating the true random number by digitally designing the device and using an oscillator control function. A device(100) for generating a true random number includes a first oscillating circuit(110) providing output of oneself as data input; a second oscillating circuit(120) providing output of oneself as clock input; a POR(Power On Reset) circuit(130) providing output of oneself as reset input; a first D-flipflop(140) operating with the input of the data, clock, and reset; an inverter(160) inverting output of the second oscillating circuit; and a second D-flipflop(150) having output of the first D-flipflop as data input, output of the inverter as clock input, and operated by a reset signal applied from the outside to generate a true random number. The POR circuit provides an operation starting signal to the first and second oscillating circuits and provides a reset signal to the first D-flipflop.
Abstract:
An RFID tag device and an operation method thereof are provided to perform a function by designing the RFID tag device with a digital logic for performing only the required function such as issuance, authentication, and usage. An RF interface(11) extracts a command from a received RF signal. A storing part(14) stores ID information and a key value for encryption. An encryptor(13) encrypts the ID information by using the key value. A controller(12) reads the ID information and the key value from the storing part, and outputs the ID information and the key value to the encryptor by the command received from the RF interface, and receives and outputs the encrypted ID information through the RF interface. The storing part is a non-volatile memory storing the information even if power is not supplied. The controller includes an RF interface linker(121), an encryptor linker(122), a storing part controller(123), and a command processor(124) implemented as the digital logic.
Abstract:
본 발명은 단말기와 연동하는 통합 전파 식별 장치 및 시스템에 관한 것으로, 단말기와 연동하는 통합 전파 식별 장치에 있어서, 외부장치인 비접촉 리더와 통신하여 RF 태그 기능을 수행하는 아날로그 RF 신호 처리부; 외부장치인 비접촉 태그와 통신하여 RF 리더 기능을 수행하는 RF 리더부; 및 상기 단말기와 연결되고, 상기 아날로그 RF 신호 처리부와 상기 RF 리더부에 대한 디지털 신호 처리를 수행하며, 상기 단말기를 통하여 상기 아날로그 RF 신호 처리부와 상기 RF 리더부의 동작을 제어하는 RF 인터페이스부;로 구성된다. 따라서, RF 태그 및 RF 리더 기능을 포함하는 통합 전파 식별 장치와 연동하는 단말기는 통합 전파 식별 장치를 제어하여 RF 태그 기능과 RF 리더 기능을 함께 이용할 수 있다.