Magnachip Semiconductor, Inc.

Haechitech Corporation

Dong Ho Kim

Ki Seok Cho

Sang Kyung Kim

Gil Sung Roh

Yong Sup Lee

Chel Ho Chung

Hee Jung Kim

Hyeong Sik Choi

Myung Soo Kang

A device for increasing a slew rate of a driving amplifier includes a driving amplifier, a slew rate improvement circuit, and a controller. The driving amplifier is configured to amplify an input voltage and output an output voltage. The slew rate improvement circuit is configured to provide or receive a current to increase the slew rate of the driving amplifier. The controller is configured to control an operation of the slew rate improvement circuit based on a difference between a first code corresponding to the input voltage of the driving amplifier during a current horizontal line time and a second code corresponding to the input voltage during a next horizontal line time.

Method for improving slew rate of amplifier circuit and display device using the same

A device includes a clock delay circuit configured to receive a reference clock signal and generate N delay clock signals, where N is a natural number greater than or equal to 2, by using the reference clock signal, and an output circuit configured to receive the N delay clock signals and output at least a portion of the delay clock signals from among the N delay clock signals as an output signal, wherein a phase delay of a delay clock signal that is output later in time from among the at least the portion of the delay clock signals is greater than or equal to a phase delay of a delay clock signal that is output earlier in time, and wherein a cycle of the output clock signal is longer than or equal to a cycle of the reference clock signal.

Spread spectrum clock generation device and method for operating spread spectrum clock generation device

According to one embodiment, a physical quantity measuring apparatus includes a signal measurer configured to include sensors configured to measure component values of two axes from among component values of three axes including an X(Hx), a Y(Hy) and a Z(Hz) measured component value of a physical quantity to be measured, a sensor controller configured to select one from among the sensors to be controlled to output a measured value from the selected sensor, an A/D transformer configured to transform an outputted signal selected by the sensor control unit into a digital signal, and a signal processor configured to receive the digital signal from the A/D transformer and to combine the received digital signal with other received digital signals to calculate X, Y and Z component values of the physical quantity.

Physical quantity measuring apparatus and signal processing method thereof

A method and an apparatus for calculating azimuth, and a method and an apparatus for determining an offset from geomagnetic field are provided. An apparatus for calculating azimuth includes a magnetic sensor configured to sense magnetic field, a data selecting unit configured to select offset data items, an offset calculating unit configured to calculate an offset by a geometrical method that uses the selected offset data items, and an azimuth calculating unit configured to calculate an azimuth by using the calculated offset.

Method and apparatus for calculating azimuth

A magnetic detection apparatus includes a Hall device configured to include terminals and to generate an electromotive force based on a magnetic field, a Hall output controller configured to control an output of the Hall device such that an output phase alteration order of a first section of the output is symmetrical to an output phase alteration order of a second section of the output on the basis of half cycle of a control cycle of the Hall device, an amplifier configured to be connected to output terminals of the Hall device to amplify the output of the Hall device, and an amplifier output controller configured to control an output polarity of the amplifier based on the output of the Hall device.

Method for controlling of hall device and magnetic detection apparatus using the same

An apparatus and a method for testing a magnetic field sensor are provided, in which the method includes arranging a coil for generating a magnetic field, applying the magnetic field to the magnetic field sensor using the coil, and detecting the magnetic field applied to the magnetic field sensor.

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Cheongju-si, South Korea

Dong Ho Kim