Patents by Inventor Yong Sik Youn
Yong Sik Youn has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10491161Abstract: An apparatus for and method of a supply modulator (SM) for a power amplifier (PA) is provided. The apparatus includes a buck-boost converter, including a supply input connected to a battery voltage (Vbat), and an output; and a buck converter, including a supply input connected to Vbat, an input connected to the output of the buck-boost converter, and an output.Type: GrantFiled: March 15, 2017Date of Patent: November 26, 2019Assignee: Samsung Electronics Co., LtdInventors: Yong Sik Youn, Seung Chul Lee, Ji Seon Paek, Thomas Byunghak Cho
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Publication number: 20170187332Abstract: An apparatus for and method of a supply modulator (SM) for a power amplifier (PA) is provided. The apparatus includes a buck-boost converter, including a supply input connected to a battery voltage (Vbat), and an output; and a buck converter, including a supply input connected to Vbat, an input connected to the output of the buck-boost converter, and an output.Type: ApplicationFiled: March 15, 2017Publication date: June 29, 2017Inventors: Yong Sik YOUN, Seung Chul Lee, Ji Seon Paek, Thomas Byunghak Cho
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Publication number: 20170085224Abstract: An apparatus for and method of a supply modulator (SM) for a power amplifier (PA) is provided. The apparatus includes a buck-boost converter, including a supply input connected to a battery voltage (Vbat), and an output; a switch and capacitors module, including a first input connected to the output of the buck-boost converter, and a second input; a buck (dual) converter, including a supply input connected to Vbat, an input connected to the output of the buck-boost converter, and an output connected to the second input of the switch and capacitors module; a linear amplifier (LA), including a supply input connected to the output of the buck-boost converter, an input, and an output connected to the second input of the switch and capacitors module; and the PA, including a supply input connected to the output of the buck (dual converter, an input for receiving a radio frequency (RF) signal, and an output for outputting an RF signal.Type: ApplicationFiled: November 30, 2015Publication date: March 23, 2017Inventors: Yong Sik YOUN, Seung Chul LEE, Ji Seon PAEK, Thomas Byunghak CHO
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Patent number: 9602057Abstract: An apparatus for and method of a supply modulator (SM) for a power amplifier (PA) is provided. The apparatus includes a buck-boost converter, including a supply input connected to a battery voltage (Vbat), and an output; a switch and capacitors module, including a first input connected to the output of the buck-boost converter, and a second input; a buck (dual) converter, including a supply input connected to Vbat, an input connected to the output of the buck-boost converter, and an output connected to the second input of the switch and capacitors module; a linear amplifier (LA), including a supply input connected to the output of the buck-boost converter, an input, and an output connected to the second input of the switch and capacitors module; and the PA, including a supply input connected to the output of the buck (dual converter, an input for receiving a radio frequency (RF) signal, and an output for outputting an RF signal.Type: GrantFiled: November 30, 2015Date of Patent: March 21, 2017Assignee: Samsung Electronics Co., LtdInventors: Yong Sik Youn, Seung Chul Lee, Ji Seon Paek, Thomas Byunghak Cho
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Patent number: 9525384Abstract: A method and a supply modulator (SM) are provided for supplying power from a wireless transmitter to a radio frequency (RF) power amplifier. A power control signal input from a modem is received. A reference voltage is determined. An operating mode of the SM is changed by controlling a level of the reference voltage. A voltage is determined based on the level of a reference voltage. When the operating mode of the SM is an ET mode, a first output signal from a linear regulator and a second output signal from a switching regulator are combined to obtain a combined result, and the combined result is output. The first output signal is based on the voltage. When the operating mode of the SM is an APT mode, the voltage based on the reference voltage is output.Type: GrantFiled: September 2, 2015Date of Patent: December 20, 2016Assignee: Samsung Electronics Co., LtdInventors: Sung-Jun Lee, Ji-Seon Paek, Seung-Chul Lee, Yong-Sik Youn, Jun-Hee Jung, Thomas Byunghak Cho, Sang-Wook Han
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Publication number: 20160065139Abstract: A method and a supply modulator (SM) are provided for supplying power from a wireless transmitter to a radio frequency (RF) power amplifier. A power control signal input from a modem is received. A reference voltage is determined. An operating mode of the SM is changed by controlling a level of the reference voltage. A voltage is determined based on the level of a reference voltage. When the operating mode of the SM is an ET mode, a first output signal from a linear regulator and a second output signal from a switching regulator are combined to obtain a combined result, and the combined result is output. The first output signal is based on the voltage. When the operating mode of the SM is an APT mode, the voltage based on the reference voltage is output.Type: ApplicationFiled: September 2, 2015Publication date: March 3, 2016Inventors: Sung-Jun LEE, Ji-Seon Paek, Seung-Chul Lee, Yong-Sik Youn, Jun-Hee Jung, Thomas Byunghak Cho, Sang-Wook Han
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Patent number: 8436188Abstract: Disclosed is a method for the separation of S-(?)-amlodipine from a racemic amlodipine. Featuring the use of inexpensive L-tartaric acid as an optical resolution agent and DMAC as a solvent, the separation method allows the resolution of S-(?)-amlodipine from racemic amlodipine at high yield and to a satisfactory enantiomeric excess and thus is economically favorable and applicable to the mass production of the optical isomer.Type: GrantFiled: October 26, 2007Date of Patent: May 7, 2013Assignee: CJ Cheiljedang CorporationInventors: Seog Beom Song, Il Hwan Cho, Yong Sik Youn, Dong Kwon Lim
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Patent number: 8362263Abstract: Disclosed are crystalline S-(?)-amlodipine adipic acid salt anhydrous and a preparation method thereof. The crystalline S-(?)-amlodipine adipic acid salt anhydrous exhibits excellent physical and chemical properties including non-hygroscopicity, solubility, thermal stability, and photostability, and is superior in formulation processability and long-term storage safety.Type: GrantFiled: October 26, 2007Date of Patent: January 29, 2013Assignee: CJ Cheiljedang CorporationInventors: Il Hwan Cho, Yong Sik Youn, Seog Beom Song, Dong Kwon Lim
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Publication number: 20100069642Abstract: Disclosed are crystalline S-(?)-amlodipine adipic acid salt anhydrous and a preparation method thereof. The crystalline S-(?)-amlodipine adipic acid salt anhydrous exhibits excellent physical and chemical properties including non-hygroscopicity, solubility, thermal stability, and photostability, and is superior in formulation processability and long-term storage safety.Type: ApplicationFiled: October 26, 2007Publication date: March 18, 2010Applicant: CJ CHEILJEDANG CORPORATIONInventors: Il Hwan Cho, Yong Sik Youn, Seog Beom Song, Dong Kwon Lim
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Publication number: 20100069445Abstract: Disclosed is a method for the separation of S-(?)-amlodipine from a racemic amlodipine. Featuring the use of inexpensive L-tartaric acid as an optical resolution agent and DMAC as a solvent, the separation method allows the resolution of S-(?)-amlodipine from racemic amlodipine at high yield and to a satisfactory enantiomeric excess and thus is economically favorable and applicable to the mass production of the optical isomer.Type: ApplicationFiled: October 26, 2007Publication date: March 18, 2010Applicant: CJ CHEILJEDANG CORPORATIONInventors: Seog Beom Song, Il Hwan Cho, Yong Sik Youn, Dong Kwon Lim
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Publication number: 20090042930Abstract: Provided is a pharmaceutical composition including clopidogrel bisulfate and a pregelatinized starch. The pharmaceutical composition in which the stability of clopidogrel bisulfate is significantly enhanced can be obtained by mixing clopidogrel bisulfate with the pregelatinized starch.Type: ApplicationFiled: July 14, 2006Publication date: February 12, 2009Applicant: CJ CHEILJEDANG CORP.Inventors: Jeong KU, Dong-Kwon LIM, Eun-Young YANG, Tae-Kun AN, Eun-Kyung JEON, Kwang-Do CHOI, Yong-Sik YOUN, Tae-Hyoung KIM, Hea-Ran SUH, Chang-Ju KIM
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Patent number: 7432398Abstract: Disclosed are novel inorganic acid salts of sibutramine, which have good physicochemical properties, and crystalline forms thereof. Also disclosed are pharmaceutical compositions comprising the compounds as effective ingredients, methods of preparing the compounds, and the use of the compounds.Type: GrantFiled: January 6, 2006Date of Patent: October 7, 2008Assignee: CJ CorporationInventors: Dong Kwon Lim, Eun Young Yang, Jae Kyoung Ko, Kwang Do Choi, Yong Sik Youn, Hea Ran Suh, Chang Ju Kim
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Patent number: 7429679Abstract: Disclosed is a novel sulphonic acid salt of sibutramine, which has good physicochemical properties. Also disclosed are a method of preparing the compound and a pharmaceutical composition comprising the compound.Type: GrantFiled: January 6, 2006Date of Patent: September 30, 2008Assignee: CJ CorporationInventors: Dong Kwon Lim, Eun Young Yang, Jae Kyoung Ko, Kwang Do Choi, Yong Sik Youn, Hea Ran Suh, Chang Ju Kim
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Patent number: 7393977Abstract: Disclosed is a novel dicarboxylic acid salt of sibutramine, which has good physicochemical properties. Also disclosed are a method of preparing the compound and a pharmaceutical composition comprising the compound.Type: GrantFiled: January 6, 2006Date of Patent: July 1, 2008Assignee: CJ Cheiljedang CorporationInventors: Kwang Do Choi, Yong Sik Youn, Hea Ran Suh, Dong Kwon Lim, Eun Young Yang, Jae Kyoung Ko, Chang Ju Kim
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Patent number: 7329780Abstract: Provided is a method of preparing an optically pure compound having formula 1 or its salts. The method includes: reacting (R)-2-(4-methoxy-3-aminosulfonyl-phenyl)-1 -methylethylamine or its salts with a compound selected from the group consisting of chloroacetic acid, bromoacetic acid, fluoroacetic acid, iodoacetic acid, ?-halogenoacetic acid anhydride, and ?-halogenoacetyl halide in the presence of a base or an acylating agent.Type: GrantFiled: December 9, 2004Date of Patent: February 12, 2008Assignee: CJ CorporationInventors: Seong Hwan Cho, Dong Kwon Lim, Kwang Hyeg Lee, Yong Sik Youn, Choong Sil Park
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Patent number: 7015238Abstract: A novel crystalline organic acid salt of amlodipine having improved physiochemical properties, a preparation method thereof and a pharmaceutical composition comprising the same are provided.Type: GrantFiled: August 29, 2003Date of Patent: March 21, 2006Assignee: CJ Corp.Inventors: Dong Kwon Lim, Hyuk Koo Lee, Hea Ran Suh, Seong Hwan Cho, Kwang Hyeg Lee, Yun Cheul Kim, Sung Hak Jung, Sung Hak Lee, Hyun Suk Kang, Kyung Mi Park, Yun Taek Jung, Jun Hee Cheon, Choong Sil Park, Yong Sik Youn, Young Hoon Kim, Kyu Jeong Yeon, Myeong Yun Chae, Hae Tak Jin
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Patent number: 6940350Abstract: An amplifier including an amplifier transistor that operates in an active region has main current flowing therethrough according to input voltage, and a linear transistor that is driven by offset positive-polarity input voltage to operate in a linear region and has auxiliary current flowing therethrough. The main current and auxiliary current are added to become output current. The offset positive-polarity voltage corresponds to the sum of AC component of the input voltage and an offset DC voltage. Here, a transistor stacked on the linear transistor is coupled to the amplifier transistor to secure the linear region operation of the linear transistor. The stacked transistor is driven by a voltage having polarity opposite to that of the input voltage.Type: GrantFiled: July 11, 2003Date of Patent: September 6, 2005Assignee: Electronics and Telecommunications Research InstituteInventors: Yong-Sik Youn, Hyun-Kyu Yu, Mun-Yang Park
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Patent number: 6903124Abstract: Disclosed are a novel organic acid salt of amlodipine, its preparation method, and a pharmaceutical composition containing as a therapeutically active ingredient the same.Type: GrantFiled: July 29, 2003Date of Patent: June 7, 2005Assignee: CJ CorpInventors: Seong Hwan Cho, Yong Sik Youn, Yun Taek Jung, Choong Sil Park, Hyuk Koo Lee, Kwang Hyeg Lee, Eun Ju Jeong, Young Hoon Kim, Hae Tak Jin, Jun Hee Cheon, Sung Hak Lee, Sung Hak Jung, Dong Kwon Lim, Kyu Jeong Yeon, Yun Cheul Kim, Kyung Mi Park, Hyun Suk Kang
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Patent number: 6890944Abstract: Disclosed are a novel organic acid salt of amlodipine, its preparation method, and a pharmaceutical composition containing the same as a therapeutically active ingredient.Type: GrantFiled: July 29, 2003Date of Patent: May 10, 2005Assignee: CJ CorporationInventors: Seong Hwan Cho, Yong Sik Youn, Yun Taek Jung, Choong Sil Park, Hyuk Koo Lee, Kwang Hyeg Lee, Eun Ju Jeong, Young Hoon Kim, Hae Tak Jin, Jun Hee Cheon, Sung Hak Lee, Sung Hak Jung, Dong Kwon Lim, Kyu Jeong Yeon, Yun Cheul Kim, Kyung Mi Park, Hyun Suk Kang
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Patent number: 6846931Abstract: Disclosed are a novel organic acid salt of amlodipine, its preparation method, and a pharmaceutical composition containing the same as a therapeutically active ingredient.Type: GrantFiled: August 19, 2003Date of Patent: January 25, 2005Assignee: CJ CorpInventors: Yong Sik Youn, Seong Hwan Cho, Choong Sil Park, Yun Cheul Kim, Dong Kwon Lim, Sung Hak Jung, Sung Hak Lee, Hyun Suk Kang, Kyung Mi Park, Yun Taek Jung, Young Hoon Kim, Kyu Jeong Yeon, Myeong Yun Chae, Hae Tak Jin, Hea Ran Suh, Kwang Hyeg Lee, Hyuk Koo Lee