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Patent Agency Ranking
公开(公告)号：US10432164B2
公开(公告)日：2019-10-01
申请号：US15835148
申请日：2017-12-07
Inventor： Sun Woo Kong , Cheol Ho Kim , Bong Hyuk Park , Hui Dong Lee
IPC: H03H7/38 , H03H7/40 , H03F3/19 , H03F1/56 , H01F27/29 , H03H11/32 , H03H7/09 , H03F3/193 , H04M1/76
Abstract: A matching circuit in a communication apparatus may comprise a first inductor disposed at a primary side of a transformer; a second inductor disposed at a secondary side of the transformer; and an impedance element connected to the first inductor and the second inductor. Also, a first terminal of the first inductor may be connected to an input terminal of the transformer, a second terminal of the first inductor may be connected to a common node connected to a ground, a first terminal of the second inductor may be connected to an output terminal of the transformer, a second terminal of the second inductor may be connected to the common node, a first terminal of the impedance element may be connected to the common node, and a second terminal of the impedance element may be connected to the ground.
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公开(公告)号：US10193718B2
公开(公告)日：2019-01-29
申请号：US15870826
申请日：2018-01-12
Inventor： Sun Woo Kong , Bong Hyuk Park , Moon Sik Lee , Hui Dong Lee
Abstract: A data modulation apparatus may comprise a S2D conversion part including a first amplifier operating based on a carrier wave signal and two transformers receiving an output signal of the first amplifier; a first switch part transferring status of input data to the first amplifier based on the input data; a differential amplification part receiving output signals of the S2D conversion part and amplifying the output signals of the S2D conversion part; a D2S conversion part receiving output signals of the differential amplification part and performing modulation on the output signals by converting the output signals to a single signal; and a second switch part transferring the output signals of the differential amplification part to the D2S conversion part based on the input data. Here, the first switch part and the second switch part may be alternately turned on and off.
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公开(公告)号：US10804862B2
公开(公告)日：2020-10-13
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：US11205998B2
公开(公告)日：2021-12-21
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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公开(公告)号：US10547478B2
公开(公告)日：2020-01-28
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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