1
Sang Hoon Ha, Sang Hee Kim, Joong Jin Nam, Ki Joong Kim, Jae Hyouck Choi, Shinichi Ilzuka, Youn Suk Kim: Power amplifier system with power control function. Samsung Electro-Mechanics, Lowe Hauptman Ham & Berner, August 30, 2011: US08008974 (8 worldwide citation)

A power amplifier system with power control function provides accurate and efficient power control by controlling a bias voltage and a bias current of the power amplifier at the same time. A power amplifier system with power control function according to an aspect of the invention may include: a pow ...


2
Shinichi Iizuka, Youn Suk Kim, Jun Goo Won, Myeong Woo Han, Young Jean Song, Ju Young Park, Ki Joong Kim: Bias circuit and power amplifier having the same. Samsung Electro-Mechanics, McDermott Will & Emery, October 7, 2014: US08854142 (6 worldwide citation)

There are provided a bias circuit supplying different levels of bias power according to respective power modes through a simple circuit configuration, and a power amplifier having the same. The bias circuit includes: a bias setting unit setting a bias power voltage level by switching reference power ...


3
Myeong Woo Han, Youn Suk Kim, Shinichi Iizuka, Ju Young Park, Ki Joong Kim, Young Jean Song, Jun Goo Won: Front end module. Samsung Electro-Mechanics, McDermott Will & Emery, June 2, 2015: US09048898 (3 worldwide citation)

There is provided a front end module, including an amplification circuit unit amplifying signal, a multistage matching circuit unit connected to an output terminal of the amplification circuit unit, and a switch circuit unit connected to the multistage matching circuit unit, wherein the switch circu ...


4
Ki Joong Kim, Youn Suk Kim, Jun Goo Won, Jae Hyouck Choi, Sang Wook Park, Chul Hwan Yoon: Power combiner, power amplifying module having the same, and signal transceiving module. Samsung Electro-Mechanics, McDermott Will & Emery, December 16, 2014: US08912865 (2 worldwide citation)

There are provided a power combiner implemented by a printed circuit board, a power amplifying module having the same, and a signal transceiving module. The power combiner includes: a primary wiring unit formed on one surface of a printed circuit board, receiving a plurality of balance signals havin ...


5
Yu Sin Kim, Youn Suk Kim, Dong Hyun Baek, Sun Woo Yoon: Radio frequency switch circuit. Samsung Electro-Mechanics, Korea Advanced Institute of Science and Technology, Lowe Hauptman Ham & Berner, June 11, 2013: US08461919 (2 worldwide citation)

A radio frequency (RF) switch circuit in which an RF switch and a switch controller are formed on a single CMOS substrate and floating resistors are connected to a deep N type well substrate, an N type well substrate, and a P type well substrate to thereby increase linearity with respect to input po ...


6
Youn Suk Kim, Myeong Woo Han, Jun Goo Won, Shinichi Iizuka, Young Jean Song, Ki Joong Kim: Radio frequency input circuit with ESD protection function. Samsung Electro-Mechanics, NSIP Law, August 25, 2015: US09118176 (2 worldwide citation)

There is provided a radio frequency input circuit including a first direct current blocking unit provided between an input terminal and an input circuit unit and blocking a direct current voltage introduced through the input terminal, a first ESD protection circuit unit provided in parallel with the ...


7
Yu Sin Kim, Song Cheol Hong, Sang Hyun Baek, Youn Suk Kim: Asymmetric power divider. Samsung Electro-Mechanics, Korea Advanced Institute of Science and Technology, Blakely Sokoloff Taylor & Zafman, January 1, 2013: US08344824 (2 worldwide citation)

Disclosed herein is an asymmetric power divider. The asymmetric power divider includes a power dividing unit, a first matching network, and a second matching network. The power dividing unit supplies different amounts of power to a carrier amplifier and a peaking amplifier, which are connected in pa ...


8
Ki Joong Kim, Shinichi Iizuka, Sang Hee Kim, Hyo Keun Bae, Youn Suk Kim: Transformer. Samsung Electro-Mechanics, Lowe Hauptman Ham & Berner, March 9, 2010: US07675397 (1 worldwide citation)

A transformer includes: a multilayer board; one or more input conductive lines formed on the multilayer board, whose both ends connected to input terminals of a positive signal and a negative signal, respectively; one output conductive line formed adjacent to the one or more input conductive lines t ...


9
Ki Joong Kim, Tae Joon Park, Young Jean Song, Jun Goo Won, Youn Suk Kim: Wireless apparatus having shielding function. Samsung Electro-Mechanics, Lowe Hauptman Ham & Berner, August 28, 2012: US08253486 (1 worldwide citation)

There is provided a wireless apparatus having a shielding function for shielding signal interference between driving power from a power amplifier and a conductive wire of a coupler. The wireless apparatus having a shielding function, includes an amplifying unit receiving preset driving power and amp ...


10
Youn Suk Kim, Jun Goo Won, Shinichi Iizuka, Ki Joong Kim: Power amplifier. Samsung Electro-Mechanics, McDermott Will & Emery, January 14, 2014: US08629724 (1 worldwide citation)

There is provided a power amplifier which may suppress fluctuations in a phase of an output signal in accordance with fluctuations in a level of an input signal by varying an impedance between a signal input terminal and an amplification unit in accordance with a power level of an input signal. The ...