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1.发明申请公开(公告)号：US20190028027A1
公开(公告)日：2019-01-24
申请号：US16030929
申请日：2018-07-10
Inventor： Young Kyun CHO , Myung Don KIM , Seok Bong HYUN , Bong Hyuk PARK , Cheol Ho KIM
CPC classification number: H02M3/157 , H02M1/08 , H02M1/143 , H02M1/44 , H02M3/158 , H02M2001/0009 , H02M2001/0032 , H02M2001/0054 , H03M3/392 , H03M3/438 , H03M3/454 , H03M3/458
Abstract: The present disclosure a switched-mode power supply using a reconfigurable delta-signal modulator (DSM). The switched-mode power supply comprises, a current sensing unit configured to determine an operation mode on the basis of a result of sensing a current of an output terminal; a compensator configured to output a compensation signal by amplifying a difference value between an output voltage and a reference voltage; a reconfigurable DSM configured to output a digital signal by noise-shaping the compensation signal; a power switch unit switched by the digital signal to output an output voltage; and an attenuator configured to supply a feedback voltage of the output voltage attenuated by a voltage divider to the compensator.
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Patent Agency Ranking
公开(公告)号：US20190207567A1
公开(公告)日：2019-07-04
申请号：US16201754
申请日：2018-11-27
Inventor： Sun Woo KONG , Myung Don KIM , Cheol Ho KIM , Hui Dong LEE
Abstract: High frequency signal amplifier including balun is disclosed. The amplifier comprises an input terminal (Vin) through which the high frequency signal is input; a balun which is connected to the input terminal and outputs a first differential signal and a second differential signal based on the high frequency signal; a transistor (M) which is connected to the balun and outputs an amplified high frequency signal based on the first differential signal and the second differential signal; an output terminal which is connected to the transistor (M) and through which the amplified high frequency signal is acquired and the amplified high frequency signal is output. Therefore, performance of the amplifier can be enhanced.
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公开(公告)号：US20190207790A1
公开(公告)日：2019-07-04
申请号：US16226812
申请日：2018-12-20
Inventor： Seung Hyun JANG , Sun Woo KONG , Kwang Seon KIM , Myung Don KIM , Hui Dong LEE
IPC: H04L25/49 , H04B10/508 , H03M3/00
Abstract: Disclosed are a method for signal modulation based on pulse density modulation and an apparatus therefore. The method for signal modulation is performed in an apparatus for modulating a signal based on pulse density modulation and includes performing pulse density modulation on an analog signal input to the apparatus through a pulse density modulator of the apparatus, converting a bandwidth of the pulse density modulated signal into a bandwidth required for the apparatus through a correlative encoder of the apparatus, transmitting the bandwidth converted signal to a radio frequency (RF) unit of the apparatus based on an electrical-to-optical (E/O) converter and an optical-to-electrical (O/E) converter of the apparatus, filtering a frequency band of the bandwidth converted signal and outputting the frequency band filtered signal via the RF unit.
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4.发明申请公开(公告)号：US20150288546A1
公开(公告)日：2015-10-08
申请号：US14636728
申请日：2015-03-03
Inventor： Heon Kook KWON , Myung Don KIM , Kwangchun LEE , Young Jun CHONG
CPC classification number: H04L25/061 , H04J11/004 , H04J11/0066 , H04L1/206 , H04L25/0212 , H04L27/22 , H04L27/3863
Abstract: A signal receiving device for measuring a characteristic of a wireless communication channel is provided. The signal receiving device includes an analog signal processor, an analog-digital converter, and a digital signal processor. The analog signal processor generates a band-limited signal by decreasing an intensity of a signal having an image frequency in a correlation operation result signal being a result of correlation operation, and generates an intermediate frequency signal by transforming the band-limited signal. The analog-digital converter converts the intermediate frequency signal into a digital signal. The digital signal processor generates a demodulated signal by performing in-phase/quadrature-phase modulation on the digital signal, the demodulated signal including a baseband signal, which includes a direct current component, and signals repeated at constant frequency intervals with a same bandwidth as the baseband signal, and generates an impulse response signal by decreasing intensities of the repeated signals in the demodulated signal.
Abstract translation: 提供了一种用于测量无线通信信道的特性的信号接收装置。 信号接收装置包括模拟信号处理器，模拟数字转换器和数字信号处理器。 模拟信号处理器通过减小作为相关运算结果的相关运算结果信号中具有图像频率的信号的强度来产生频带限制信号，并且通过变换频带限制信号来产生中频信号。 模数转换器将中频信号转换为数字信号。 数字信号处理器通过对数字信号执行同相/正交相位调制来产生解调信号，该解调信号包括包括直流分量的基带信号和以恒定频率间隔以与 基带信号，并且通过降低解调信号中的重复信号的强度来产生脉冲响应信号。
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公开(公告)号：US20190326814A1
公开(公告)日：2019-10-24
申请号：US16198398
申请日：2018-11-21
Inventor： Young Kyun CHO , Myung Don KIM , Seok Bong HYUN
Abstract: A buck-boost converter using a delta-sigma modulator (DSM) includes a buck-boost mode driving circuit configured to receive an input voltage and output an output voltage according to an operation mode, a mode controller configured to sense an output of the buck-boost mode driving circuit and determine the operation mode, and a gate driver configured to receive a mode determination signal for determining the operation mode from the mode controller and control switches included in the buck-boost mode driving circuit. Accordingly, output ripple characteristics thereof can be improved.
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公开(公告)号：US20170142606A1
公开(公告)日：2017-05-18
申请号：US15244046
申请日：2016-08-23
Inventor： Juyul LEE , Myung Don KIM , Jinup KIM , Hyun Kyu CHUNG , Minuk KIM , Jubum KIM , Eun Ae LEE , Joon Ho CHO
CPC classification number: H04B7/086
Abstract: Disclosed are an apparatus and a method for estimating a parameter of a multi path signal. The apparatus for estimating a parameter of a multi path signal includes: a plurality of pre-processing units configured to pre-process respective reception signals received through a plurality of antennas; a plurality of parameter converting units configured to approximate a parameter set of the respective pre-processed reception signals to have a sparse characteristic in a Doppler frequency and angle of arrival domain; and a parameter estimating unit configured to estimate an angle of arrival for a plurality of reception signals in each frequency region of the Doppler frequency and angle of arrival domain.
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