Samsung Electronics Co., Ltd.

Osong Medical Innovation Foundation, Korea University Research and Business Foundation

Quram Co., Ltd.

Young-Hoon Min

Il-Jong Song

Ja-nam Ku

Dong-Hyun Lee

Yuri Tikhov

Sang-Wook Kwon

Yong-jin Kim

Si-Gyoung Koo

Woo-Gyu Lim

Seok-Kyu Jang

Dong-sik Shim

Ji-Hun Koo

Kuang-Woo Nam

Seong-hearn Lee

Jin-Hun Koo

Chung-woul Kim

Young-Eil Kim

Hyung Ki Choi

Jae-Min Jung

Young Cheul Wee

Sin-Jae Lee

Seon-Wook Kim

Jin-Woo Nam

Young-June Woo

Chol-Su Yoon

Joon-goo Lee

Cheong-Worl Kim

Myung-Gun Kim

Young-Sun Han

Chang-Gie Lee

Sung-oh Kim

Kyeong-soon Cho

A method and apparatus for managing metadata in a portable terminal are provided. The method includes, upon insertion of an external memory, acquiring a unique identifier of an external memory, determining whether a record having information identical to information of a file included in the external memory exists if the unique identifier is identical to a previously stored unique identifier, and reusing metadata included in the record if the record exists.

Apparatus and method for managing metadata in portable terminal

A mobile terminal communicates with a base station to request channel allocation for RFID communication, receives a channel from the base station, and communicates with an RFID tag through the allocated channel.

RFID communication method and apparatus

In a method of communicating in a radio frequency identification (RFID) system including a RFID reader and a plurality of RFID tags, a plurality of spread spectrum data are stored in the plurality of RFID tags. The plurality of spread spectrum data are transmitted from the plurality of RFID tags to the RFID reader. A plurality of original data respectively corresponding to the plurality of RFID tags are simultaneously extracted from the plurality of spread spectrum data at the RFID reader.

RFID communication method and system

A method and apparatus for preventing illegal reuse of Digital Right Management (DRM) content in a portable terminal is provided. The method includes performing user authentication when there is an attempt to restore a Right Object (RO) backup file, and identifying information on the RO backup file to be pre-restored in a terminal, and determining if the RO backup file can be restored according to the identified information.

Method and apparatus for preventing illegal reuse of digital right management content in portable terminal

A radio frequency identification (RFID) recorder for cancelling a leakage signal includes a digital unit calculating and storing an amplitude and a phase of the leakage signal, and a leakage cancellation circuit generating a leakage cancellation signal to cancel the leakage signal in response to a control of the digital unit.

RFID reader cancelling leakage signal

An apparatus and method for dynamically changing a password are provided. In the method, a random number is generated, and an original password and an operator are checked. The original password is changed by performing an operation of the random number and the original password based on the operator. Accordingly, the password exposure can be prevented and the personal information and asset information can be protected without using additional devices.

Apparatus and method for dynamically changing a password

A Radio Frequency (RF) transmission method of a Radio Frequency Identification (RFID) reader using a plurality of channels is provided. The method includes: selecting at least part of the plurality of channels, measuring an RF power of each of the selected channels, determining a transmission environment of the RF according to a measurement determination, and modulating an RF signal according to the determined transmission environment.

RFID reader and RF transmission method thereof

Provided are an apparatus and a method for saving a memory in a portable terminal, the method includes receiving a request for basic data and an address indicating a storage position of the basic data; determining whether the requested basic data has been stored in a paging buffer; if it is determined that the requested basic data has not been stored in the paging buffer, transforming the address of the requested basic data into an address of a corresponding compressed block using a block address table; searching the compressed basic data for the compressed block corresponding to the address of the compressed block; decompressing the searched compressed block; storing data of the decompressed block in the paging buffer; and returning the requested basic data stored in the paging buffer.

Apparatus and method for efficient memory use in portable terminal

A radio frequency identification reader and a radio frequency identification tag that use an ultrahigh frequency band, and action methods of the radio frequency identification reader and the radio frequency identification tag. The radio frequency identification reader includes: a data generator generating data to be transmitted to a radio frequency identification tag; if a command to control the radio frequency identification tag has to be authenticated, a reader controller controlling the data generator to generate the data including an authentication code; and a reader transmitter transmitting the data to the radio frequency identification tag. As a result, securing of communications of a specific command between the radio frequency identification reader and the radio frequency identification tag can be reinforced.

RFID reader and RFID tag using UHF band and action methods thereof

A level shifter increase a voltage level of an output signal with relatively lower power consumption by adopting current-starved configuration. The level shifter includes an input unit and a driving unit. The input unit includes a current-starved inverter configured to generate a control signal in response to an input signal and a bias voltage. The input unit is powered by a first power supply voltage. The driving unit generates an output signal in response to the control signal. The output signal has a voltage level higher than the input signal, and the driving unit is powered by a second power supply voltage higher than the first power supply voltage.

Ultra-low-power level shifter, voltage transform circuit and RFID tag including the same

An over-voltage protection circuit (i.e., a limiter), includes: a first switching block having a plurality of semiconductor elements, serially connected to each other and turned on in sequence according to the magnitude of an input voltage; and a plurality of second switching blocks, in which each of the second switching blocks includes a pair of serially connected semiconductor elements having different current properties. The second switching blocks are connected in parallel to the first switching block. By minimizing a leakage current when an input voltage is below a reference voltage and by maximizing a leakage current when the input voltage is above the reference voltage, the limiter prevents excessive current from flowing into the RF tag circuit when the input voltage is below the reference voltage, and ensures that a sufficient amount of current is supplied to a regulator when the input voltage is below the reference voltage.

Ultra-low power limiter

An integrated circuit structure in which a plurality of Schottky diodes and a capacitor are integrally formed. The integrated circuit structure includes a substrate including an N-type semiconductor doped with N-type impurities and a P-type semiconductor doped with P-type impurities; a first conductive layer laminated on the substrate so that the first conductive layer is electrically connected to the N-type semiconductor and the P-type semiconductor; a dielectric layer laminated on an upper surface of the first conductive layer; and a second conductive layer laminated on an upper surface of the dielectric layer so that the second conductive layer forms a capacitor together with the first conductive layer and the dielectric layer. Accordingly, when the integrated circuit structure is used in a rectification circuit, the size of an entire circuit can be reduced.

Structure for realizing integrated circuit having Schottky diode and method of fabricating the same

Disclosed are a temperature measurement apparatus and method for measuring temperature by using RF signals having different frequencies. The temperature measurement apparatus includes a parameter generation unit for generating a first parameter based on a radio frequency (RF) signal having a first frequency and a second parameter based on an RF signal having a second frequency; a parameter detection unit for detecting the generated first and second parameters; and a control unit for calculating a temperature value based on the detected first and second parameters. Accordingly, the temperature measurement apparatus can measure temperature by use of existing components and received RF signals without any addition of a temperature sensor, as well as measure temperature precisely without having any influence on the intensities of RF signals that can vary due to the changes of transmission distances and signal-receiving environments.

Temperature measurement apparatus and method for measuring temperatures by using RF signals of different frequencies

A limiter for controlling an overvoltage and an RFID tag having the same are provided. The limiter includes a first limiter part and a second limiter part serially connected to the first limiter part. The second limiter part has at least one limit diode whose threshold voltage is lower than that of elements in the first limiter part. Accordingly, if an overvoltage is input, the limiter can maximize the input current drop so that the limiter can maximize the leakage voltage. As a result, the RFID tag can prevent the RFID driving part from being damaged due to the overvoltage. In addition, the RFID tag can normally operate regardless of the intensity of the driving voltage input from the RFID reader, so that the yields of products can improve.

Limiter for controlling overvoltage and RFID tag having the same

A low leakage Schottky diode and fabrication method thereof. The Schottky diode includes a n-type semiconductor; an anode having a circular periphery formed in a region above the n-type semiconductor; and a cathode formed in a region above the n-type semiconductor and having a pattern surrounding and set apart from the outer periphery of the anode. Because there are no edges at the anode and cathode interface, leakage current is minimized.

Growing community of inventors

Anyang-si, South Korea

Young-Hoon Min