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公开(公告)号：US20170272290A1
公开(公告)日：2017-09-21
申请号：US15460537
申请日：2017-03-16
Inventor： Seung Hyun JANG , Bong Hyuk PARK , Hui Dong LEE
CPC classification number: H04L27/2003 , H03F1/0222 , H03F3/19 , H03F3/245 , H03F3/45475 , H03F2200/102 , H03F2200/451 , H03F2203/45526 , H04B1/04 , H04B1/0483 , H04B2001/0408 , H04L27/122
Abstract: An envelope signal time delay adjustment apparatus includes a negative group delay unit for converting an envelope signal input from a signal generator into an envelope signal having a group delay of a negative value whose frequency increases from a predetermined frequency band; an envelope-tracking modulator for power-amplifying and outputting the envelope signal output from the negative group delay unit; and a frequency limiting unit for limiting a bandwidth of the envelope-tracking modulator to be lower than an original bandwidth of the envelope-tracking modulator.
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公开(公告)号：US20240223408A1
公开(公告)日：2024-07-04
申请号：US18395956
申请日：2023-12-26
Inventor： Seung Hun WANG , Sun Woo KONG , Bong Hyuk PARK , Hui Dong LEE , Seung Hyun JANG , Seok Bong HYUN
CPC classification number: H04L25/0272 , H03M3/34 , H04B3/02
Abstract: A reconfigurable circuit for differential network includes: first circuit which is a two-port differential circuit; first cross-coupled switch circuit connected to first port on one side of the first circuit in parallel; and second circuit connected to second port on the other side of the first cross-coupled switch circuit in series. The first cross-coupled switch circuit includes: first-series switch disposed between and connected to first terminal of the first port and first terminal of the second port in series; second-series switch disposed between and connected to second terminal of the first port and second terminal of the second port in series; first cross-coupled element disposed between and connected to the first terminal of the first port and the second terminal of the second port; and second cross-coupled element disposed between and connected to the second terminal of the first port and the first terminal of the second port.
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公开(公告)号：US20200266775A1
公开(公告)日：2020-08-20
申请号：US16788177
申请日：2020-02-11
Inventor： Sun Woo KONG , Kwang Seon KIM , Jee Hoon PARK , Kwang Chun LEE , Hui Dong LEE , Seung Hyun JANG
Abstract: An amplifier may comprise first and second matching networks; first and second transistors; and a transformer including first to third inductors. Also, a gate and a source of the first transistor are connected to the first matching network, one end of the first inductor is connected to a drain of the first transistor, the other end of the first inductor is connected to a source of the second transistor, one end of the second inductor is connected to a gate of the second transistor, the other end of the second inductor is grounded, one end of the third inductor is connected to a drain of the second transistor, and the other end of the third inductor is connected to the second matching network.
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4.发明申请APPARATUS AND METHOD FOR ADJUSTING ENVELOPE SIGNAL DELAY IN ENVELOPE-TRACKING POWER AMPLIFIER 有权用于调节信号跟踪功率放大器中的信号延迟的装置和方法公开(公告)号：US20160218679A1
公开(公告)日：2016-07-28
申请号：US14996809
申请日：2016-01-15
Inventor： Seung Hyun JANG , Bong Hyuk PARK , Nam Sik RYU , Dong Seung KWON
CPC classification number: H03F1/0222 , H03F3/19 , H03F3/245 , H03F2200/102 , H03F2200/451 , H03G3/30 , H03G3/3005
Abstract: Provided is an apparatus for adjusting an envelope signal delay in an envelope-tracking power amplifier. The apparatus includes: an envelope signal providing unit configured to provide an envelope signal; a variable negative group delay unit configured to adjust a group delay of the envelope signal received from the envelope signal providing unit and output the adjusted envelope signal; an envelope modulator configured to modulate the envelope signal outputted from the variable negative group delay unit; a group delay difference detecting unit configured to detect a group delay difference between the envelope signal which is outputted from the envelope signal providing unit and the envelope signal which is outputted from the envelope modulator; and a control signal generating unit configured to generate a control signal to control a group delay value of the variable negative group delay unit according to the group delay difference.
Abstract translation: 提供了一种用于调整包络跟踪功率放大器中的包络信号延迟的装置。 该装置包括：包络信号提供单元，被配置为提供包络信号; 可变负组延迟单元，被配置为调整从包络信号提供单元接收的包络信号的组延迟并输出调整的包络信号; 包络调制器，被配置为调制从所述可变负组延迟单元输出的包络信号; 组延迟差检测单元，被配置为检测从包络信号提供单元输出的包络信号与从包络调制器输出的包络信号之间的组延迟差; 以及控制信号生成单元，被配置为根据组延迟差产生控制信号以控制可变负组延迟单元的组延迟值。
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Patent Agency Ranking
公开(公告)号：US20240224221A1
公开(公告)日：2024-07-04
申请号：US18491468
申请日：2023-10-20
Inventor： Seok Bong HYUN , Sung Jun LEE , Sun Woo KONG , Bong Hyuk PARK , Hui Dong LEE , Seung Hyun JANG
CPC classification number: H04W64/00 , G01S5/0218
Abstract: An operation method of a first communication node may comprise: receiving a first signal from a second communication node of the communication system; estimating a first time interval corresponding to a first path detected as a FAP among one or more paths through which the first signal is received; defining a first gain control function based on the estimated first time interval; receiving a second signal transmitted from the second communication node by variably controlling a reception gain based on the first gain control function; estimating a second time interval corresponding to a DP between the first and second communication nodes, based on a result of receiving the second signal based on the first gain control function; and transmitting relative distance information on the second time interval to a first positioning device.
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公开(公告)号：US20230224191A1
公开(公告)日：2023-07-13
申请号：US18059197
申请日：2022-11-28
Inventor： Seung Hun WANG , Sun Woo KONG , Bong Hyuk PARK , Hui Dong LEE , Seung Hyun JANG , Seok Bong HYUN
CPC classification number: H04L25/0272 , H01P1/383
Abstract: A differential transmission line having a switch may comprise: a first transmission line comprising a first distribution element having a first impedance; a second transmission line comprising a second distribution element having a second impedance; and a first switch block connected between a first end of the first transmission line and a first end of the second transmission line, wherein the first switch block comprises a first switch connected in series to the first end of the first transmission line, a second switch connected in series to the first end of the second transmission line, a first-cross capacitor connected between a first terminal of the first switch and a second terminal of the second switch, and a second cross-capacitor connected between a first terminal of the second switch and a second terminal of the first switch.
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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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8.发明申请公开(公告)号：US20160094294A1
公开(公告)日：2016-03-31
申请号：US14863862
申请日：2015-09-24
Inventor： Seung Hyun JANG , Bong Hyuk PARK , Dong Seung KWON
IPC: H04B10/2575 , H04W88/08
CPC classification number: H04B10/25753 , H04B10/25759
Abstract: The present invention relates to a central office device, a remote site device, and a communication method thereof that can be used in a radio over fiber (RoF) technique. Provided are a central office device and a communication method thereof that convert an analog signal into a signal having a carrier with an intermediate frequency and converts the converted signal into a digital signal to transmit the converted digital signal to a remote site device. Provided are a remote site device and a communication method thereof that filter a digital signal having a carrier with an intermediate frequency to easily induce a corresponding analog signal.
Abstract translation: 本发明涉及可用于无线电光纤（RoF）技术的中心局设备，远程站点设备及其通信方法。 提供了一种中央办公设备及其通信方法，其将模拟信号转换为具有中频的载波的信号，并将转换的信号转换为数字信号，以将转换的数字信号发送到远程站点设备。 提供一种远程站点设备及其通信方法，其对具有中频的载波的数字信号进行滤波以容易地引起对应的模拟信号。
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公开(公告)号：US20140064355A1
公开(公告)日：2014-03-06
申请号：US14011268
申请日：2013-08-27
Inventor： Young Kyun CHO , Sung Jun LEE , Seung Hyun JANG , Bong Hyuk PARK , Jae Ho JUNG , Kwang Chun LEE
CPC classification number: H04L25/4902 , H03K7/08 , H03M3/504 , H04B14/062
Abstract: A delta-sigma modulator and a transmitter apparatus including the same are disclosed. The delta-sigma modulator includes a first integrator, a second integrator, a first comparator configured to compare an output signal of the second integrator and a reference signal, and output a first comparison signal, a second comparator configured to compare the output signal of the second integrator and the reference signal, and output a second comparison signal, a first DAC configured to output the first signal corresponding to the first comparison signal and the second comparison signal, a second DAC configured to output the second signal corresponding to the first comparison signal and the second comparison signal, a delayer configured to generate a delayed signal that delays the first comparison signal and the second comparison signal by a predetermined time, and an output DAC configured to generate an output signal having a multi-level corresponding to the delayed signal.
Abstract translation: 公开了一种Δ-Σ调制器及其发射机装置。 Δ-Σ调制器包括第一积分器，第二积分器，被配置为比较第二积分器的输出信号和参考信号的第一比较器，并输出第一比较信号;第二比较器，被配置为比较第二积分器的输出信号 第二积分器和参考信号，并输出第二比较信号，第一DAC被配置为输出对应于第一比较信号和第二比较信号的第一信号;第二DAC，被配置为输出对应于第一比较信号的第二信号 和第二比较信号，延迟器，被配置为产生将第一比较信号和第二比较信号延迟预定时间的延迟信号;以及输出DAC，被配置为产生具有与延迟信号相对应的多电平的输出信号 。
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