Patent application number | Description | Published |
20110280334 | DIGITAL AMPLITUDE MODULATOR AND POLAR TRANSMITTER USING THEREOF - The present invention provides a digital amplitude modulator and polar transmitter using the same. The polar transmitter includes: a polar converter for converting an input signal into an amplitude information signal and a phase information signal, and outputting the converted amplitude and phase information signal; a sigma-delta modulator for receiving a fractional part of the amplitude information signal, and generating a correcting value for an integer part of the amplitude information signal; a phase-modulator for upward-modulating the phase information signal outputted from the polar converter, and outputting carrier waves including the upward-modulated phase information signal; and a digital power amplifier for generating an output signal whose amplitude corresponds to the integer part of the amplitude information signal which is subjected to correction by the correcting value, and outputting combining the output signal with an output value of the phase-modulator to output the combined signal. | 11-17-2011 |
20110309885 | DELAY CIRCUIT FOR LOW POWER RING OSCILLATOR - Disclosed herein is a delay circuit for a low power ring oscillator. The delay circuit includes: a pair of N type transistors that receive first differential input signals Vin | 12-22-2011 |
20120111029 | AC POWERED THERMOELECTRIC DEVICE - Disclosed herein is an AC powered thermoelectric device, including: a power supplier outputting AC power; a plurality of thermoelectric modules; and a plurality of rectifiers connected to each of the plurality of thermoelectric modules in series and applying the AC power having different polarities to each of the plurality of thermoelectric modules, whereby the positions of the hot side and the cold side are fixed to function as a heater and a cooler, while using the AC power. | 05-10-2012 |
20120268197 | PAD CONTROLLING APPARATUS - Disclosed herein is a pad controlling apparatus controlling current and voltage applied to a pad, the pad controlling apparatus including: a voltage drop unit dropping the voltage applied to the pad; a switching unit connected in parallel with the voltage drop unit; and a control unit comparing a level of the dropped voltage and first reference voltage with each other and turning on the switching unit on when the level of the dropped voltage is larger than the first reference voltage. According to the present invention, even though interrupt occurs from the outside, a chip may be normally operated. | 10-25-2012 |
20130181947 | TOUCH SCREEN PANEL - Disclosed herein is a touch screen panel. The touch screen panel includes: a driving unit generating a driving signal; a signal sensing unit that is activated by the driving signal input from the driving unit; and a signal detection unit that generates a combination signal by using a sensing signal generated by capacitance sensed by the signal sensing unit, and counts a period of the sensing signal by using the combination signal to calculate a counting value and calculates a delay time of a remaining period after the counting, and combines the calculated values to determine a cell in which the capacitance is generated. | 07-18-2013 |
20130325391 | CIRCUIT AND METHOD FOR SENSING TEMPERATURE - The present invention relates to a circuit and a method for sensing a temperature. In accordance with an embodiment of the present invention, a circuit for sensing a temperature including: a bipolar transistor unit connected to a current source to output an output voltage which is inversely proportional to temperature; a variable reference voltage unit for providing a variable reference voltage which varies according to setting; a first amplifying unit for receiving the output voltage of the bipolar transistor unit and the variable reference voltage and performing differential amplification to output the amplified voltage; and a second amplifying unit for variably amplifying a variation of the output voltage of the first amplifying unit using a feedback variable resistor is provided. Further, a method for sensing a temperature using the same is provided. | 12-05-2013 |
20140036974 | ADAPTIVE FILTER AND METHOD OF ADAPTIVE FILTERING - The present invention relates to an adaptive filter, which includes an analog filter; an analog-digital converter; a modem; a control unit connected to the modem to detect an adjacent interference signal adjacent to an interested channel signal; and a filter control signal generating unit connected to the control unit to generate a filter control signal for controlling a capacity of a variable capacitor, and a method of adaptive filtering and can control a filter passband adaptively to the adjacent interference signal. | 02-06-2014 |
20150048985 | ANTENNA MODULE FOR NEAR FIELD COMMUNICATION - Embodiments of the invention provide an antenna module for NFC. According to at least one embodiment, the antenna module includes an antenna sheet patterned with a loop coil of a conductive metal material, a magnetic shielding sheet comprising a metal sheet, which is embedded in a magnetic sheet, and an adhesive film interposed between the antenna sheet and the magnetic shielding sheet. | 02-19-2015 |