Abstract: The present invention relates to a method for preparing a vanadia-titania catalyst having a core-shell structure, which is highly active in decomposing chlorinated organic compounds such as dioxin present in the exhaust of an incinerator.

Abstract: A voltage detecting device and an analog-to-digital converter (ADC) using the same are provided. The voltage detecting device determines whether input voltage is higher than threshold voltage based on contact of a strip and a membrane. Therefore, high resolution and high speed operation is possible, but with consuming lower power, and an element capable of performing the function of resistor and comparator is provided. Furthermore, a more effective ADC may be provided using the above.

Abstract: An azimuth measurement apparatus including: a positioning signal receiver receiving a first impulse positioning signal and a second impulse positioning signal from a first fixed position and a second fixed position, respectively; a phase difference detector detecting a phase difference between the first impulse positioning signal and the second impulse positioning signal; and an azimuth calculator measuring an azimuth of an object of positioning, based on the detected phase difference of the two positioning signals.

Abstract: A manufacturing method of an array substrate for a liquid crystal display device includes among other features, preparing a substrate including a display area and a non-display area, forming first and second gate shorting bars in the non-display area and electrically connected to gate lines, forming first and second data shorting bars in the non-display area and electrically connected to data lines, forming n gate probe test lines in the non-display area, forming m data probe test lines in the non-display area, forming first connection patterns connecting the gate lines and the n gate probe test lines, and forming second connection patterns connecting the data lines and the m data probe test lines, wherein the gate lines include n gate groups connected to the n gate probe test lines, respectively, and wherein the data lines include m data groups connected to the m data probe test lines, respectively.

Abstract: A wideband track-and-hold amplifier is provided. The wideband track-and-hold amplifier is provided in front of an analog-to-digital converter, receives and samples an analog signal, and transfers the sampled signal to the analog-to-digital converter, wherein an output load unit having an inductance component is connected to an input terminal of the analog-to-digital converter. Therefore, it is possible to compensate for a high capacitance component of an analog-to-digital converter, to increase the bandwidth of an output signal, and to improve system linearity.

Abstract: A cascade comparator and a control method thereof are provided. By applying multi-phase clock signals to a plurality of comparators when the plurality of comparators are cascaded together so that each comparator is regenerated before the preceding comparator is reset, a hold switch does not need to be provided between the comparators. Therefore, it is possible to reduce the size and parasitic components of a circuit, operate the circuit at a high speed, remove a glitch caused by any hold switch, and accordingly improve system linearity.

Abstract: The present invention discloses methods for preparing vanadia-titania catalysts in the form of nanostructured particles, where vanadia particles are dispersed at the surface of a titanium dioxide carrier and attached thereto, which are useful for degrading chlorinated organic compounds. The method of the present invention has a number of advantages in that: (i) it is capable of producing vanadia-titania catalysts by a relatively simple process as compared to the conventional wet-type method; (ii) the size of the catalyst particles can be easily regulated; and (iii) the vanadia-titania catalysts prepared according to the method of the present invention exhibit excellent degradation efficiency with respect to chlorinated organic compounds even at a low temperature, compared to catalysts prepared by the wet-type method, due to their nanostructure that provides the catalysts with large reactive surface area and high physical stability.

Abstract: An Analog to Digital (AD) converter and an AD converting method are provided. The AD converter includes one or more stators, and one or more actuators that move according to an input voltage. The digital output of the AD converter is determined based on an arrangement of the stators and the positions of the actuators relative to the stators. The AD converter can achieve high resolution and/or high speed with lower power consumption.

Abstract: A CMOS amplifier of a filter for an ultra wideband application and a method of the same are provided. In the CMOS amplifier, an active load circuit adds a Zero location and increases a gain by MOSFETs, feeding back operation, and has a property of a high gain and a wide bandwidth. When the CMOS amplifier is applied to a biquad LPF, a high voltage linearity over about 200 mV peak-to-peak and an suitable ultra wideband property over about 320 MHz of an cutoff frequency may be achieved.

Abstract: A multiband receiving apparatus and multiband transmitting apparatus using a tunable band is provided. The receiving apparatus includes a receiving unit for receiving radio frequency (RF) signals, and a tunable filter unit for selectively outputting the received RF signals. As a result, a complicated RF transceiving system is simplified, and time and cost for developing and designing a transceiving apparatus are reduced.

Abstract: A phase-locked loop (PLL) for stably adjusting a frequency band of a voltage-controlled oscillator and a phase locking method. In the PLL, a frequency band controller alters the frequency band selection digital value in response to an input clock signal and an oscillation control signal generated from an LPF of a basic PLL circuit, and thus a voltage-controlled oscillator of the basic PLL circuit alters the frequency of an output clock signal in response to the oscillation control signal and the frequency band selection digital value. The output clock signal is rapidly and stably phase-locked at a target frequency depending on the frequency band selection digital value.

Abstract: A voltage detecting device and an analog-to-digital converter (ADC) using the same are provided. The voltage detecting device determines whether input voltage is higher than threshold voltage based on contact of a strip and a membrane. Therefore, high resolution and high speed operation is possible, but with consuming lower power, and an element capable of performing the function of resistor and comparator is provided. Furthermore, a more effective ADC may be provided using the above.

Abstract: In particular embodiments, an online trading system receives a product registration request including product description from a user terminal. Then, image information is extracted from the product description and a resource locator of the image information is generated. Then, an image list is generated based on the product description and the resource locator of the image information. The image list is sent to a search service DB server, where the image list is associated with a keyword relevant to the product description. Further, the image list may be sent to a UCC DB server. In this case, the UCC DB server generates a UCC containing the image list and sends a resource locator of the UCC to the search service DB server, which associates the resource locator of the UCC with a keyword relevant to the product description.

Abstract: In particular embodiments, a system and method for representing an exploration of resources over a communication network is disclosed. According to the embodiments, if a search query representing a target resource locator is received from a user, resources having links to the target resource locator are searched. Then, a data structure including a hierarchy of nodes and its graphical representation is generated for representing the resources each having a link to the target resource locator. The graphical representation may include a constellation map including a plurality of planets representing the resources each having a link to the target resource locator. Such data structure and graphical representation may be saved in a database for later retrieval. The system and method provides a user-friendly graphical representation of exploring resources linked to a target resource such as a webpage or a blog site managed by the user.

Abstract: A ring oscillator and a phase error calibration method are provided. The ring oscillator may include a first voltage-current converter for controlling and outputting an amount of tail current Itail according to a magnitude of a first control voltage applied in feedback in a PLL circuit; a second voltage-current converter for controlling and outputting an amount of shift current according to a magnitude of a second control voltage applied from a system phase error detector; and differential amplifiers for controlling, for output signals, a delay time of signals based on the applied tail current amount and a shift time of the signals based on the shift current amount. Thus, a phase relation between in-phase and quadrature-phase signals outputted from the ring oscillator may be controlled.

Abstract: Disclosed are a variable gain differential amplifier, and variable degeneration impedance control device and method for use in the variable gain differential amplifier, which can adjust an amplification gain and ensure linearity. A DC level of a differential signal to be amplified by the amplifier is adjusted according to a control signal to adjust a gain of the amplifier, and the impedance of a variable degeneration impedance part is adjusted according to the differential signal of which the DC level is adjusted. That is, the gain of the differential amplifier is adjusted and the linearity is ensured by varying the impedance of the variable degeneration impedance part using the differential input signal of which the DC level is adjusted.

Abstract: In particular embodiments, an integrated search system and method for clustering search results into a plurality of groups based on its contents, each of the groups linked by a representative image, is disclosed. The system includes a clustering engine, an image engine, a database, and a web server. The clustering engine is configured to cluster resources stored in the database into a plurality of groups, each group including resources related to a common topic. The image engine determines a representative image for each of the groups. The database stores information on resources included in each of the groups and a representative image for the group. In one embodiment, the web server is configured to provide a user a plurality of images, each representing a group of resources related to common topic, where as the number of resources included in each group increases, a size of a representative image for the group becomes larger.

Abstract: A wobble signal reproducing device and method. The wobble signal reproducing device may include a computation unit for outputting a push-pull signal by use of a signal picked up by wobbling an optical disc; a wobble band pass filter (BPF) unit for applying band pass filtering to the push-pull signal based on a first control signal, applying low pass filtering to the band pass filtering-applied signal based on a second control signal, and outputting a wobble signal; a wobble phase locked loop (PLL) unit for generating a channel clock signal based on the wobble signal, wherein the first and second control signals correspond to the channel clock signal, the wobble BPF unit applies the band pass filtering at a center frequency varying based on the first control signal, and applies the low pass filtering at a cutoff frequency varying based on the second control signal.

Abstract: A digital-to-analog converter converts a digital input signal into an analog signal. The digital-to-analog converter includes: a power-supply unit for outputting voltages of different magnitudes through plural output terminals thereof; plural switches connected to the plural output terminals, which are controlled on and off, and are for applying the output voltages of the power-supply unit or a ground voltage to a next stage; and plural source transistors connected to the plural switches for outputting currents of magnitudes corresponding to the voltages applied from the respective connected switches of the plural switches. The plural source transistors are designed to have the same operating characteristics, thereby improving glitch characteristics.

Abstract: An azimuth measurement apparatus including: a positioning signal receiver receiving a first impulse positioning signal and a second impulse positioning signal from a first fixed position and a second fixed position, respectively; a phase difference detector detecting a phase difference between the first impulse positioning signal and the second impulse positioning signal; and an azimuth calculator measuring an azimuth of an object of positioning, based on the detected phase difference of the two positioning signals.