| Patent application number | Description | Published |
|---|
| 20080238546 | FULLY DIFFERENTIAL CLASS AB AMPLIFIER AND AMPLIFYING METHOD USING SINGLE-ENDED, TWO-STAGE AMPLIFIER - A fully differential amplifier includes a first single-ended current mirror type fully differential amplifier outputting a first output signal by two stage amplifying a difference between a first input signal and a second input signal and a second single-ended current mirror type fully differential amplifier outputting a second output signal by two stage amplifying a difference between the first input signal and the second input signal. A first tail of the first single-ended current mirror type fully differential amplifier and a second tail of the second single-ended current mirror type fully differential amplifier are connected to each other and the first output signal and the second output signal are differential signals. | 10-02-2008 |
| 20090066415 | OPERATIONAL AMPLIFIER HAVING HIGH SLEW RATE AND STABILITY, AND OPERATING METHOD THEREOF - An operational amplifier includes a differential amplifier, an output stage, and a control unit. The differential amplifier generates a first current through a first output node and a second current through a second output node in response to a voltage difference between a first input signal input through a first input terminal and a second input signal input through a second input terminal. The output stage generates an output signal through an output node. The control unit receives a voltage of the first output node and a voltage of the second output node, as bias voltages, and controls an output current of the output stage to determine the output signal of the output stage in response to the received voltages of the first and second output nodes. | 03-12-2009 |
| 20090302824 | REFERENCE VOLTAGE GENERATING APPARATUS AND METHOD - A method and apparatus for generating a low reference voltage having low power consumption characteristics is provided. A reference voltage generating apparatus includes a constant current source circuit which generates a reference current. A load circuit is connected to the constant current source circuit and generates a voltage which is proportional to the reference current. A current branch circuit removes a portion of temperature-invariant current components included in the reference current from a connection terminal of the constant current source circuit and the load circuit to a ground terminal through a current branch which is different from a current branch of the load circuit. | 12-10-2009 |
| 20090322737 | Gate Driver, Method of Driving the Gate Driver, and Display Panel Driving Apparatus Including the Gate Driver - A display panel driving apparatus and a method of driving the same are provided, and, in particular, a gate driver and a method of driving the gate driver. The gate driver includes a decoder that decodes gate line selection data and that generates a gate line selection signal. A gate driving circuit generates a gate driving signal in a pre-charging phase and a driving phase in response to the gate line selection signal and a pre-charging control signal that controls an off-state of non-selected gate lines. In a time period of the driving phase in which a gate line is not selected, a node that has been in a floating state is held to a target voltage level in response to a hold control signal. The hold control signal is generated based upon a timing relationship between the gate line selection signal and the pre-charging control signal. | 12-31-2009 |
| 20100110040 | TOUCH CONTROLLER HAVING INCREASED SENSING SENSITIVITY, AND DISPLAY DRIVING CIRCUIT AND DISPLAY DEVICE AND SYSTEM HAVING THE TOUCH CONTROLLER - A touch controller includes a touch data generator that is connected to a plurality of sensing lines, the touch data generator sensing a change in capacitance of a sensing unit connected to each of the sensing lines and generating touch data by processing the sensing signal corresponding to the result of sensing; and a signal processor that controls a timing of generating the touch data by receiving at least one piece of timing information for driving a display panel from a timing controller, and then providing either the timing information or a signal generated from the timing information as a control signal to the touch data generator. | 05-06-2010 |
| 20100171372 | Charge Pump Circuit and Voltage Converter Using the Same - An apparatus for generating a voltage required for a semiconductor device by using a voltage supplied from an external power supply is provided. A charge pump circuit includes a first circuit comprising a first capacitor and a first group of switching elements and controlling the first group of switching elements according to first and second switching signals to transfer a voltage charged in the first capacitor to a target terminal during a first period and to charge the first capacitor with a reference voltage applied to a first input terminal of the first capacitor during a second period, and a second circuit comprising a second capacitor, a third capacitor connected between an output terminal and a ground terminal and a second group of switching elements, and controlling the second group of switching elements according to the first and second switching signals to connect a first terminal of the second capacitor to the ground terminal during the first period, connect the first terminal of the second capacitor to a power supply voltage input terminal during the second period, connect a second terminal of the second capacitor to the power supply voltage input terminal when a voltage of the second terminal of the second capacitor is lower than a voltage of the target terminal during the first period, and connect the second terminal of the second capacitor to the output terminal during the second period. | 07-08-2010 |
| 20100295522 | SEMICONDUCTOR DEVICE HAVING VOLTAGE REGULATOR - A semiconductor device includes a voltage regulator. The device includes an operational amplifier configured to compare an input voltage with a feedback voltage and output an output voltage, an up-resistor connected between an output of the operational amplifier and a first node, a down-resistor connected between a second node and a ground voltage terminal, and a switching unit including a fuse box connected between a third node outputting the feedback voltage and a fourth node having a variable resistance value, and configured to connect the first node with the fourth node and the second node with the third node, or connect the first node with the third node and the second node with the fourth node. | 11-25-2010 |
| 20110043185 | CURRENT REFERENCE CIRCUIT - A current reference circuit includes a proportional-to-absolute temperature (PTAT) current generator, a band-gap reference circuit and a current replication circuit. The PTAT generator generates a PTAT current. The band-gap reference circuit generates a reference voltage based on the PTAT current and generates a second current by cancelling a first current from the PTAT current. The first current has a zero temperature coefficient and the second current has a positive temperature coefficient. The current replication circuit replicates the first current based on the PTAT current and the second current. | 02-24-2011 |
| 20110096068 | LEVEL SHIFTER - A level shifter including a voltage selection unit and at least one voltage level conversion unit. The voltage selection unit may be configured to apply a first voltage to a power supply node during a first time interval and apply a second voltage to the power supply node during a second time interval, in response to a control signal. The voltage level conversion unit may be connected to the power supply node and may be configured to convert a voltage level of an input signal to another voltage level based upon a voltage level at the power supply node and a third voltage. | 04-28-2011 |
| 20110157079 | CAPACITIVE SENSING DEVICE COMPRISING CROSS-SHAPED SENSING ELEMENTS - A capacitive sensing device comprises first electrodes in which a plurality of first sensing elements are arranged in rows and columns, and second electrodes in which a plurality of second sensing elements are arranged in rows and columns. Each of the first sensing elements has an iron cross shape, and each of the second sensing elements has a double-cross shape in which a first cross and a second cross overlap each at a shared center point and the second cross is rotated with respect to the first cross. Capacitances are formed between the first sensing elements and the second sensing elements. | 06-30-2011 |
