Abstract: The present disclosure relates to a polycarbonate resin composition, and more particularly, to a polycarbonate resin composition containing 90 wt % to 99 wt % of a polycarbonate resin, 0.3 wt % to 0.7 wt % of an anthraquinone-based black dye, and 0.2 wt % to 1.0 wt % of an acrylic polymeric chain extender, and a molded article containing the same.

Abstract: The present invention relates to an apparatus for supplying hot water and, more particularly, to a hot water supply apparatus using a revolving magnetic body, wherein the apparatus is driven with low power consumption while being environment-friendly and having excellent safety when hot water and heating are supplied, the apparatus including: a heat exchange body containing water, and including a circular heating pipe circumferentially provided in the heat exchange body; a stator provided to encompass an outside of the heat exchange body and wound with a plurality of coils, the stator being magnetized when an electric current is applied thereto, wherein the heating pipe includes therein a magnetic body that revolves along the circumference of the heating pipe due to a magnetic field formed by the stator, so that water is heated by frictional heat generated when the magnetic body revolves.

Abstract: To control a gain of a transmit signal in a wireless transmitter, the wireless transmitter is provided. The wireless transmitter includes a baseband processor for processing an analog baseband transmit signal, and a Radio Frequency (RF) signal processor including a plurality of mixers. The plurality of mixers are configured to share an output signal of the baseband processor as an input.

Abstract: The present invention relates to a launching apparatus and, more particularly, to a launching apparatus using a revolving magnetic body, wherein the apparatus is safe and is capable of being driven with low power consumption, the apparatus including: an acceleration pipe formed by spirally winding a hollow pipe made of a non-magnetic material; a stator wound with a plurality of coils to encompass an outside of the acceleration pipe, and forming a magnetic field by being magnetized when an electric current is applied thereto; and a magnetic body launched outside after revolving along a circumference of the acceleration pipe due to a force exerted thereto by the magnetic field.

Abstract: The present invention relates to a launching apparatus and, more particularly, to a launching apparatus using a revolving magnetic body, wherein the apparatus is safe and is capable of being driven with low power consumption, the apparatus including: an acceleration pipe formed by spirally winding a hollow pipe made of a non-magnetic material; a stator wound with a plurality of coils to encompass an outside of the acceleration pipe, and forming a magnetic field by being magnetized when an electric current is applied thereto; and a magnetic body launched outside after revolving along a circumference of the acceleration pipe due to a force exerted thereto by the magnetic field.

Abstract: The present invention relates to an apparatus for supplying hot water and, more particularly, to a hot water supply apparatus using a revolving magnetic body, wherein the apparatus is driven with low power consumption while being environment-friendly and having excellent safety when hot water and heating are supplied, the apparatus including: a heat exchange body containing water, and including a circular heating pipe circumferentially provided in the heat exchange body; a stator provided to encompass an outside of the heat exchange body and wound with a plurality of coils, the stator being magnetized when an electric current is applied thereto, wherein the heating pipe includes therein a magnetic body that revolves along the circumference of the heating pipe due to a magnetic field formed by the stator, so that water is heated by frictional heat generated when the magnetic body revolves.

Abstract: The present invention relates to a method for providing a treasure hunting service and a system therefor and, particularly, to a method for providing a treasure hunting service and system therefor whereby virtual and real environments are continuously linked to each other since a location of treasure and multi-stage tasks to find the locations are provided in the virtual environment but most of the task executions thereof are carried out in the real environment, and thereby a game user leaves the screen. Thus, the virtual and real environments are seamlessly connected to each other and moved in a cycle. Limitations of the virtual environment can be overcome such that a result achieved in the real environment, which is an actual living space, is registered in the virtual environment and enables the game user to increase his grade. The game user can enjoy various qualifications and benefits according to the promotion.

Abstract: An electronic device for compensating for process variation is provided. The electronic device includes a first circuit configured to consume a current supplied to the first circuit, and a second circuit configured to control the current supplied to the first circuit, The second circuit is configured to generate a signal for controlling the current supplied to the circuit based on a frequency of a pulse signal generated using a second component that is of a same kind as a first component of the first circuit.

Abstract: A method and apparatus for calibrating a terminal is provided. The apparatus includes a modem; a transmission chain configured to process a signal input from the modem and transmit the processed signal via an antenna; a reception chain configured to process a signal received via the antenna and transmit the processed signal to the modem; and a connector configured to connect an output of the transmission chain and an output of the reception chain via an envelope detector and a switch configured to turn on/off the envelope detector, calibrate a DC offset voltage and I and Q signals of the transmission chain by inputting a one-tone signal of 1 MHz into the transmission channel via the modem in a state where the envelope detector is turned on, and calibrate a second order input intercept point (IIP2) characteristic value by adjusting the signal input into the modem via the reception channel.

Abstract: An apparatus and a method for Direct Current (DC) offset calibration in a signal transmission device of a wireless communication system are provided. The apparatus includes a first DC calibration unit for removing a DC offset from a signal, which is output from a Current-to-Voltage Converter (IVC), by using a first DC calibration value, a Variable Gain Amplifier (VGA) for amplifying the signal output from the IVC, a second DC calibration unit for removing a DC offset from a signal output from the VGA by using a second DC calibration value, a Low Pass Filter (LPF) for filtering the signal output from the VGA, a third DC calibration unit for removing a DC offset from a signal output from the LPF by using a third DC calibration value, and a controller for determining the first DC calibration value, the second DC calibration value and the third DC calibration value.

Abstract: An electronic device and a method for control of an output amplitude of a Voltage Control Oscillator (VCO) in the electronic device is provided. The electronic device includes a first circuit configured to output a frequency signal corresponding to a control voltage, and a second circuit configured to generate control bits that control an amplitude of the frequency signal based on a comparison result between a peak voltage of the frequency signal and a reference voltage of the frequency signal.

Abstract: A method and apparatus for calibrating a terminal is provided. The apparatus includes a modem; a transmission chain configured to process a signal input from the modem and transmit the processed signal via an antenna; a reception chain configured to process a signal received via the antenna and transmit the processed signal to the modem; and a connector configured to connect an output of the transmission chain and an output of the reception chain via an envelope detector and a switch configured to turn on/off the envelope detector, calibrate a DC offset voltage and I and Q signals of the transmission chain by inputting a one-tone signal of 1 MHz into the transmission channel via the modem in a state where the envelope detector is turned on, and calibrate a second order input intercept point (IIP2) characteristic value by adjusting the signal input into the modem via the reception channel.

Abstract: An electronic device and a method for control of an output amplitude of a Voltage Control Oscillator (VCO) in the electronic device is provided. The electronic device includes a first circuit configured to output a frequency signal corresponding to a control voltage, and a second circuit configured to generate control bits that control an amplitude of the frequency signal based on a comparison result between a peak voltage of the frequency signal and a reference voltage of the frequency signal.

Abstract: An electronic device for compensating for process variation is provided. The electronic device includes a first circuit configured to consume a current supplied to the first circuit, and a second circuit configured to control the current supplied to the first circuit. The second circuit is configured to generate a signal for controlling the current supplied to the circuit based on a frequency of a pulse signal generated using a second component that is of a same kind as a first component of the first circuit.

Abstract: To control a gain of a transmit signal in a wireless transmitter, the wireless transmitter is provided. The wireless transmitter includes a baseband processor for processing an analog baseband transmit signal, and a Radio Frequency (RF) signal processor including a plurality of mixers. The plurality of mixers are configured to share an output signal of the baseband processor as an input.

Abstract: An apparatus and a method for Direct Current (DC) offset calibration in a signal transmission device of a wireless communication system are provided. The apparatus includes a first DC calibration unit for removing a DC offset from a signal, which is output from a Current-to-Voltage Converter (IVC), by using a first DC calibration value, a Variable Gain Amplifier (VGA) for amplifying the signal output from the IVC, a second DC calibration unit for removing a DC offset from a signal output from the VGA by using a second DC calibration value, a Low Pass Filter (LPF) for filtering the signal output from the VGA, a third DC calibration unit for removing a DC offset from a signal output from the LPF by using a third DC calibration value, and a controller for determining the first DC calibration value, the second DC calibration value and the third DC calibration value.

Abstract: An apparatus and a method for increasing Error Vector Magnitude (EVM) performance representing quality of transmission signal are provided. The apparatus and the method suppress an image frequency component generated due to mismatch of IQ channels in order to transmit/receive a large amount of data without distortion in 4th generation wireless communication standard candidate technologies such as a Long Term Evolution (LTE) system and a mobile WiMax system. The apparatus includes a LOcal frequency (LO) buffer including an amplifier. The LO buffer controls the gain and the phase of the amplifier using a control bit for controlling resistor connection.

Abstract: A drive amplifier having improved linearity while being characterized by low current consumption. The drive amplifier includes first and second transistors having a gate to which first and second differential Radio Frequency (RF) voltages are respectively input; a third transistor which has a drain connected to a drain of the second transistor and a source connected to the gate of the first transistor, and a drain-source current which increases with an increase in the second differential RF voltage; and a fourth transistor which has a drain connected to a drain of the first transistor and a source connected to the gate of the second transistor, and a drain-source current which increases with an increase in the first differential RF voltage.

Abstract: A drive amplifier having improved linearity while being characterized by low current consumption. The drive amplifier includes first and second transistors having a gate to which first and second differential Radio Frequency (RF) voltages are respectively input; a third transistor which has a drain connected to a drain of the second transistor and a source connected to the gate of the first transistor, and a drain-source current which increases with an increase in the second differential RF voltage; and a fourth transistor which has a drain connected to a drain of the first transistor and a source connected to the gate of the second transistor, and a drain-source current which increases with an increase in the first differential RF voltage.

Abstract: An apparatus and a method for increasing Error Vector Magnitude (EVM) performance representing quality of transmission signal are provided. The apparatus and the method suppress an image frequency component generated due to mismatch of IQ channels in order to transmit/receive a large amount of data without distortion in 4th generation wireless communication standard candidate technologies such as a Long Term Evolution (LTE) system and a mobile WiMax system. The apparatus includes a LOcal frequency (LO) buffer including an amplifier. The LO buffer controls the gain and the phase of the amplifier using a control bit for controlling resistor connection.