| Patent application number | Description | Published |
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| 20090108946 | SWITCH, NEGATIVE RESISTANCE CELL, AND DIFFERENTIAL VOLTAGE CONTROLLED OSCILLATOR USING THE SAME - The present invention relates to a switch, a negative resistance cell, and a differential voltage controlled oscillator using the same. The present invention includes a first signal line provided in a first direction, a second signal line provided in parallel with the first signal line, and first to fourth gate electrodes, first to third source electrodes, and first to fourth drain electrodes formed between the first signal line and the second signal line, and provides a switch having electrodes in the order of the first gate electrode, the first drain electrode, the second gate electrode, the first source electrode, the third gate electrode, the second drain electrode, the fourth gate electrode, the second source electrode, the fifth gate electrode, the third drain electrode, the sixth gate electrode, the third source electrode, the seventh gate electrode, the fourth drain electrode, and the eighth gate electrode. According to the present invention, a differential voltage controlled oscillator for RF oscillation operation in the broadband area is realized by minimizing generation of parasitic components. | 04-30-2009 |
| 20110109392 | LOW NOISE AMPLIFIER - Provided is a Low Noise Amplifier (LNA). Embodiments of the present invention provide LNAs including: a common gate amplifier circuit configure to amplify a signal of an input node to which an Alternating Current (AC) component is provided and transfer the amplified signal to an amplifier node; and a negative-feedback amplifier circuit configured to amplify a signal of the amplifier node, transfer the amplified signal to an output node, wherein the negative-feedback amplifier circuit includes a feedback capacitor and a feedback inductor connected in series between the amplifier node and the output node to form a negative feedback. the LNA of the present invention forms a negative feedback exclusive of a feedback resistance, such that a broad frequency bandwidth is obtained and noise and heat are reduced. | 05-12-2011 |
| 20110109585 | TOUCH SCREEN AND METHOD FOR COMPENSATING SENSING CAPACITANCE VARIATIONS AND OFFSET VARIATIONS THEREOF - Provided are a touch screen and a method for compensating sensing capacitance variations and offset variations thereof. The touch screen includes: a touch panel where a plurality of driving lines and a plurality of sensing lines intersect and are wired; a driving unit for activating the driving lines sequentially; an input unit for measuring a sensing capacitance formed in a sensing line corresponding to an activated driving line; a multiplexer for serializing and outputting the measured sensing capacitance; an analog-to-digital converter for sampling the sensing capacitance outputted from the multiplexer by reflecting an initial sensing capacitance as an offset and performing analog-to-digital conversion for the sampling result; and a host processor for determining a touch event in response to the analog-to-digital conversion result. | 05-12-2011 |
| 20110148478 | FREQUENCY CONVERSION MIXER - Provided is a frequency conversion mixer. The frequency conversion mixer includes a transconductance stage, a switching stage, a load stage, a current bleeding circuit, and a bias stage. The transconductance stage receives an RF signal, and outputs a current corresponding to a voltage of the RF signal. The switching stage switches the current which is outputted from the transconductance stage in response to a local oscillation signal, for frequency conversion the RF signal into an intermediate frequency (IF) signal. The load stage is connected between the switching stage and a supply voltage terminal. The current bleeding circuit is connected parallel with the switching stage, especially, embodying inverter structure with transconductance stage to get not only current bleeding effect but also current reuse effect, and one resonant inductor for reducing noise which is generated in parasitic capacitance at node between transconductance stage and switching stage. The bias stage is connected between the transconductance stage and a ground terminal, and has the switched biasing technique for allowing not only the stable bias current but also lowering the flicker noise. | 06-23-2011 |
| 20110248763 | CHARGE PUMPING CIRCUIT - A charge pumping circuit is provided to regulate the amount of charge to be pumped according to a driving voltage to reduce the loss of power and increase charge pumping efficiency. The charge pumping circuit includes: a driving voltage sensing unit sensing a driving voltage to generate one or more sensing signals for determining the amount of charge to be pumped; a multi-level clock generation unit generating a pair of clock signals each having an amplitude corresponding to a signal value of each of the one or more sensing signals; and a charge pumping unit charging the pair of clock signals to generate a charged voltage, adding the charged voltage to the driving voltage, and outputting the same. | 10-13-2011 |
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| 20100152365 | CARBOXYLIC ACID-MODIFIED NITRILE COPOLYMER LATEX AND LATEX COMPOSITION FOR DIP FORMING COMPRISING THE SAME - A carboxylic acid-modified nitrile copolymer latex is provided. The copolymer latex comprises a carboxylic acid-modified nitrile copolymer of an unsaturated monomer having at least one crosslinkable functional group selected from vinyl and epoxy groups. The use of the copolymer latex enables the production of a molded article that does not undergo long stirring and maturation, causes no allergic reactions due to the absence of sulfur and a vulcanization accelerator, has good oil resistance and high mechanical strength, and produces a soft feeling. Further provided is a latex composition for dip forming comprising the copolymer latex, and an article produced from the latex composition by dip forming. | 06-17-2010 |
| 20110014402 | Styrene-Butadiene Latex Binder For Ink-Jet Paper, Preparation Method Thereof And Coating Liquid Containing The Same - The present invention relates to a styrene-butadiene latex, a preparation method thereof and a coating liquid containing the same, more precisely a styrene-butadiene latex binder for ink-jet paper containing ethylenically unsaturated monomer by 0.1-1.5 weight parts with lowering surface negative charge density, a preparation method thereof and a coating liquid containing the same. The present invention provides a coating liquid for ink-jet paper having excellent price competitiveness and coating work-ability and at the same time reducing energy cost for drying process and thereby provides an ink-jet paper with excellent printing quality. | 01-20-2011 |
| 20110229646 | LATEX RESIN COMPOSITION FOR RUBBER GLOVES WITHOUT SULFUR AND VULCANIZATION ACCELEATOR AND METHOD OF MANUFACTURING DIP-FORMED ARTICLE USING THE COMPOSITION - The present invention provides a latex resin composition for rubber gloves without sulfur and a vulcanization accelerator and a method of manufacturing dip-formed article using the composition. The composition comprises a conjugated diene monomer; an ethylenically unsaturated nitrile monomer; an ethylenically unsaturated acid monomer; an ethylenically unsaturated monomer copolymerizable with the ethylenically unsaturated nitrile monomer and the ethylenically unsaturated acid monomer; and a reactive compound including two or more reactive groups. According to the manufacturing method, productivity is improved by omitting a long maturation process included in a traditional glove manufacturing process; not only an adverse effect caused by traditional sulfur and vulcanization accelerator is reduced but also rubber gloves with excellent physical properties can be provided. | 09-22-2011 |
| 20110290920 | SHREDDER FOR SUPER ADSORBENT POLYMER AND PREPARATION METHOD OF SUPER ABSORBENT POLYMER USING THE SAME - The present invention is to provide a shredder for super absorbent polymer that comprises: an inlet portion for feeding a plate-shaped super absorbent polymer; a pulverizing portion for pulverizing the super absorbent polymer fed through the inlet portion; and an outlet portion for discharging the pulverized super absorbent polymer from the pulverizing portion. The pulverizing portion comprises: a rotary drum to which a plurality of rotary blades are attached; at least fixed blade for pulverizing the super absorbent polymer in cooperation with the plural rotary blades; and a housing for holding the rotary drum and the at least one fixed blade. Each rotary blade has a shape of polygon with at least one vertex having an acute angle of at most 45°. | 12-01-2011 |
