Samsung Electro-mechanics Co., Ltd.

Kyung Uk Kim

Jeong Hoon Kim

Kwang Du Lee

Seung Chul Pyo

Young Ha Cho

Sung Tae Kim

Eung Soo Kim

Soo Woong Lee

Hyun Suk Lee

Bon Young Koo

Wan Cheol Yang

Eung Ju Kim

Sang Gyu Park

Dong Ok Han

Jung Hoo Lee

The present invention includes a calculating unit for calculating an absolute value of an applied commercial voltage, an accumulating unit for accumulating the absolute value of the applied commercial voltage per a constant period to output, an extracting unit for sampling an absolute value accumulative maximum value of the commercial voltage for each period and a determining unit for determining a quality of the commercial voltage by using the absolute value accumulative maximum value of the sampled commercial voltage. It has an advantage that the power quality can be monitored at high speed.

Power quality monitoring apparatus and method thereof

Disclosed herein is a wireless power transmission/reception apparatus and method having a communication function. The wireless power transmission/reception apparatus includes a wireless power transmission device and wireless power transmission devices. The wireless power transmission device receives a returned wireless power signal, detects the number of power consumption devices, modulates pieces of ID data, each including ID of a corresponding power consumption device, transmits the modulated ID data, receives returned ID data, and determines suitableness of the power consumption devices. Each of the wireless power reception devices returns a remaining wireless power signal which is not received among wireless power signals from the wireless power transmission device, and temporarily stops a power consumption device when an ID of the received ID data is an ID of a power consumption device connected thereto, thus returning ID data which will be subsequently received to the wireless power transmission device.

Wireless power transmission/reception apparatus and method having communication function

Disclosed herein is a wireless power transmission/reception apparatus. The wireless power transmission/reception apparatus includes a wireless power transmission unit and a wireless power reception unit. The wireless power transmission unit receives power, generates a wireless power signal to be wirelessly transmitted, wirelessly transmits the generated wireless power signal in a magnetic resonance manner, receives a returned wireless power signal and detects the number of power consumption devices, and wirelessly transmits a wireless power signal using resonance frequency appropriate for the number of power consumption devices.

Wireless power transmission/reception apparatus and method

Disclosed herein are an offset compensation apparatus for a magnetic detection circuit, and a method thereof. The offset compensation apparatus includes: an amplifying unit amplifying an output voltage, and outputting the amplified voltages; an offset detection unit detecting an offset; a comparison unit determining whether or not the offset output from the offset detection unit is greater than a pre-set positive reference value or smaller than a pre-set negative reference value; a counter unit; and a current supply.

Offset compensation apparatus for magnetic detection circuit and method thereof

There are provided a Schmitt trigger circuit that has hysteresis characteristics in which a release point and an operating point are determined based on a width of an inputted pulse. The Schmitt trigger circuit may include a signal/pulse conversion unit that receives an analog signal to generate an input pulse having a width corresponding to a magnitude of the analog signal, a pulse width determination unit that compares the width of the input pulse generated in the signal/pulse conversion unit with a predetermined first threshold width and a second threshold width greater than the first threshold width to output state information indicating the compared result, and an output determination unit that outputs a high signal, when the width of the input pulse is changed from a state of being smaller than the second threshold width to a state of being greater than the second threshold width based on the state information, and outputs a low signal when the width of the input pulse is changed from a state of being greater than the first threshold width to a state of being smaller than the first threshold width based on the state information.

Schmitt trigger circuit operated based on pulse width

A time-domain IQ mismatch detection apparatus for detecting mismatch between an I-channel signal and a Q-channel signal in unit of a sample included in a symbol of an OFDM signal comprises: a first delayer which delays an input I-channel signal by one sample interval; a second delayer which delays an input Q-channel signal by one sample interval; a first phase mismatch detector which multiplies a currently-input I-channel signal with a currently-input Q-channel signal and output a result thereof; a second phase mismatch detector which multiplies the currently-input I-channel signal and the delayed Q-channel signal and output a result thereof; a third phase mismatch detector which multiplies the delayed I-channel signal with the currently-input Q-channel signal and output a result thereof; and a phase error arithmetic unit which outputs a phase error value calculated using the outputs of the first, second and third phase mismatch detectors.

Time-domain IQ mismatch detection apparatus of OFDM receiver

An orthogonal frequency division multiplexing (OFDM) receiver capable of improving equalization performance is provided. In the OFDM receiver receiving an OFDM signal having a frame structure constructed with one reference symbol and a plurality of data symbols following the reference symbol, the OFDM receiver includes: a synchronizer which detects a position of the reference symbol from the received OFDM signal; a time-domain equalizer which equalizes in a time domain the data symbols that are separated by a distance longer than a predetermined distance from the position of the reference symbol; an FFT (fast Fourier transform) unit which performs an FFT process on the OFDM signal; and a frequency-domain equalizer which equalizes in a frequency domain the data symbols that are separated by a distance shorter than a predetermined distance from the position of the reference symbol.

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Seoul, South Korea

Kyung Uk Kim