Patents by Inventor Minsik Ahn
Minsik Ahn 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: 10738934Abstract: A gap adjusting device for adjusting a gap of displays adjacent to each other of a multi-display can include a body, a first fixing part, a second fixing part, an adjusting part, a first wire and a second wire. A fastening hole is defined in the body. The first fixing part is received inside the body, and the first fixing part is fixed to a first display. The second fixing part is received inside the body, and the second fixing part is fixed to a second display adjacent to the first display. The adjusting part is configured to be received in the fastening hole to be rotated, and the adjusting part is interposed between the first fixing part and the second fixing part. The first wire is connected to the adjusting part and the first fixing part, and the second wire is connected to the adjusting part and the second fixing part.Type: GrantFiled: September 30, 2019Date of Patent: August 11, 2020Assignee: LG DISPLAY CO., LTD.Inventor: MinSik Ahn
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Publication number: 20200103068Abstract: A gap adjusting device for adjusting a gap of displays adjacent to each other of a multi-display can include a body, a first fixing part, a second fixing part, an adjusting part, a first wire and a second wire. A fastening hole is defined in the body. The first fixing part is received inside the body, and the first fixing part is fixed to a first display. The second fixing part is received inside the body, and the second fixing part is fixed to a second display adjacent to the first display. The adjusting part is configured to be received in the fastening hole to be rotated, and the adjusting part is interposed between the first fixing part and the second fixing part. The first wire is connected to the adjusting part and the first fixing part, and the second wire is connected to the adjusting part and the second fixing part.Type: ApplicationFiled: September 30, 2019Publication date: April 2, 2020Applicant: LG DISPLAY CO., LTD.Inventor: MinSik AHN
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Patent number: 10069469Abstract: A circuit includes a first transistor comprising a gate, a source, and a drain, and an inductor coupled between the gate and the source of the first transistor, wherein the source is further coupled to a current source and the gate is further coupled to an amplifier.Type: GrantFiled: September 21, 2016Date of Patent: September 4, 2018Assignee: QUALCOMM IncorporatedInventors: Woonyun Kim, Chang-Ho Lee, Minsik Ahn, Jeongwon Cha
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Publication number: 20170222608Abstract: A circuit includes a first transistor comprising a gate, a source, and a drain, and an inductor coupled between the gate and the source of the first transistor, wherein the source is further coupled to a current source and the gate is further coupled to an amplifier.Type: ApplicationFiled: September 21, 2016Publication date: August 3, 2017Inventors: Woonyun Kim, Chang-Ho Lee, Minsik Ahn, Jeongwon Cha
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Patent number: 9160377Abstract: Exemplary embodiments are directed to an amplifier module which may comprise a transmit path including a first amplifier and a second amplifier. The exemplary amplifier module may further include a transformer coupled between the first amplifier and the second amplifier and switchably configured for coupling the first amplifier in series with the second amplifier in a first mode and coupling the first amplifier to bypass the second amplifier in a second mode.Type: GrantFiled: December 19, 2012Date of Patent: October 13, 2015Assignee: QUALCOMM IncorporatedInventors: Chang-Ho Lee, Woonyun Kim, Minsik Ahn, Jeongwon Cha, Yunseo Park, Aristotele Hadjichristos
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Patent number: 9106198Abstract: A high power tunable capacitor is disclosed. In an exemplary embodiment, an apparatus includes a capacitor coupled to an input signal, a body contacted switch coupled to the capacitor, the body contacted switch coupled to a body bias signal, and a floating body switch coupled between the body contacted switch and a ground, the floating body switch configured to decouple the body bias signal from the ground.Type: GrantFiled: August 23, 2012Date of Patent: August 11, 2015Assignee: QUALCOMM IncorporatedInventors: Minsik Ahn, Kyu Hwan An, Chang-Ho Lee, Aristotele Hadjichristos
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Patent number: 9024838Abstract: A multi-throw antenna switch with off-state capacitance reduction is disclosed. In an exemplary embodiment, an apparatus is provided that includes a plurality of first stage switches connected to an antenna, and a plurality of second stage switches connected to the plurality of first stage switches, each first stage switch connected in series to one or more second stage switches to form a plurality of switchable signal paths connected to the antenna.Type: GrantFiled: August 9, 2012Date of Patent: May 5, 2015Assignee: QUALCOMM IncorporatedInventors: Minsik Ahn, Chang-Ho Lee, Aristotele Hadjichristos
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Publication number: 20150050901Abstract: Exemplary embodiments are directed to an amplifier module which may comprise a transmit path including a first amplifier and a second amplifier. The exemplary amplifier module may further include a transformer coupled between the first amplifier and the second amplifier and switchably configured for coupling the first amplifier in series with the second amplifier in a first mode and coupling the first amplifier to bypass the second amplifier in a second mode.Type: ApplicationFiled: December 19, 2012Publication date: February 19, 2015Applicant: QUALCOMM INCORPORATEDInventors: Chang-Ho Lee, Woonyun Kim, Minsik Ahn, Jeongwon Cha, Yunseo Park, Aristotele Hadjichristos
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Publication number: 20140055212Abstract: A high power tunable capacitor is disclosed. In an exemplary embodiment, an apparatus includes a capacitor coupled to an input signal, a body contacted switch coupled to the capacitor, the body contacted switch coupled to a body bias signal, and a floating body switch coupled between the body contacted switch and a ground, the floating body switch configured to decouple the body bias signal from the ground.Type: ApplicationFiled: August 23, 2012Publication date: February 27, 2014Applicant: QUALCOMM INCORPORATEDInventors: Minsik Ahn, Kyu Hwan An, Chang-Ho Lee, Aristotele Hadjichristos
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Publication number: 20140043206Abstract: A multi-throw antenna switch with off-state capacitance reduction is disclosed. In an exemplary embodiment, an apparatus is provided that includes a plurality of first stage switches connected to an antenna, and a plurality of second stage switches connected to the plurality of first stage switches, each first stage switch connected in series to one or more second stage switches to form a plurality of switchable signal paths connected to the antenna.Type: ApplicationFiled: August 9, 2012Publication date: February 13, 2014Applicant: QUALCOMM IncorporatedInventors: Minsik Ahn, Chang-Ho Lee, Aristotele Hadjichristos
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Patent number: 8570235Abstract: Example embodiments of the invention are directed to CMOS differential antenna switches with multi-section impedance transformation. The differential architecture can provide relief from large voltage swings of the power amplifiers by distributing the voltage stress over the receiver switch with two of the identical or substantially similar single-ended switches. In order to reduce the voltage stress further, multi-section impedance transformations can be used. Degraded insertion loss due to the impedance transformation technique can be compensated by selecting an optimal impedance for the antenna switch operation. Accordingly, the use of the multi-section impedance transformations with the differential antenna switch architecture enables high power handling capability for the antenna switch with acceptable efficiency for the transmitter module.Type: GrantFiled: May 4, 2010Date of Patent: October 29, 2013Assignee: Samsung Electro-MechanicsInventors: Minsik Ahn, Chang-Ho Lee
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Publication number: 20130029614Abstract: Systems, methods, and apparatuses may provide for antenna switch controllers. An example antenna switch controller may include: a plurality of antenna switches commonly connected to one or more antennas, where each of the plurality of antenna switches includes a plurality of stacked transistors, where one of the plurality of antenna switches is enabled when transmitting or receiving one or more radio frequency (RF) signals via the one or more antennas; a voltage generator that receives an external supply voltage from a battery, where the voltage generator generates an internal supply voltage, where the internal supply voltage remains constant despite fluctuations in the external supply voltage from the battery; a clock buffer that generates clock signals from the constant internal supply voltage; and a charge pump that receives the clock signals and generates a constant negative voltage, where the constant negative voltage is for biasing of one or more of the plurality of antenna switches that are disabled.Type: ApplicationFiled: July 29, 2011Publication date: January 31, 2013Applicant: SAMSUNG ELECTRO-MECHANICS COMPANYInventors: Changhyuk Cho, Jeongwon Cha, Minsik Ahn, Chang-Ho Lee, Wyangmyong Woo, Jae Joon Chang
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Patent number: 8334708Abstract: Example driver circuits can utilize shared-charge recycling charge pump structures. In particular, an example shared-charge recycling process may be applied to a clock buffer and charge transfer cells of the charge pump in a driver circuit. An example recycling process may include recycling of shared charges between the capacitors/capacitances in the charge transfer cells. An example recycling process may use the charges in one or more capacitors to charge one or more other capacitors before the charges are wasted or otherwise discharged to ground. Such recycling may significantly reduce the power consumption of the charge pump while still providing a high output voltage level, according to an example embodiment of the invention.Type: GrantFiled: July 29, 2011Date of Patent: December 18, 2012Assignee: Samsung Electro-MechanicsInventors: Jeongwon Cha, Taejoong Song, Changhyuk Cho, Minsik Ahn, Chang-Ho Lee, Wangmyong Woo, Jae Joon Chang
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Patent number: 8288895Abstract: A tunable capacitor device may be provided in accordance with example embodiments of the invention. The tunable capacitor device may include a first capacitor; a second capacitor; a third capacitor, where the first, second, and third capacitors are connected in series, wherein the second capacitor is positioned between the first capacitor and the second capacitor; and at least one switch transistor, where the at least one switch transistor is connected in parallel with the second capacitor.Type: GrantFiled: November 27, 2009Date of Patent: October 16, 2012Assignee: Samsung Electro-MechanicsInventors: Youngchang Yoon, Hyungwook Kim, Minsik Ahn, Chang-Ho Lee, Joy Laskar
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Patent number: 8165535Abstract: Systems and methods may be provided for a CMOS RF antenna switch. The systems and methods for the CMOS RF antenna switch may include an antenna that is operative to transmit and receive signals over at least one radio frequency (RF) band, and a transmit switch coupled to the antenna, where the transmit switch is enabled to transmit a respective first signal to the antenna and disabled to prevent transmission of the first signal to the antenna. the systems and methods for the CMOS RF antenna switch may further include a receiver switch coupled to the antenna, where the receiver switch forms a filter when enabled and a resonant circuit when disabled, where the filter provides for reception of a second signal received by the antenna, and where the resonant circuit blocks reception of at least the first signal.Type: GrantFiled: May 25, 2007Date of Patent: April 24, 2012Assignee: Samsung Electro-MechanicsInventors: Minsik Ahn, Chang-Ho Lee, Jaejoon Chang, Wangmyong Woo, Haksun Kim, Joy Laskar
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Publication number: 20110273355Abstract: Example embodiments of the invention are directed to CMOS differential antenna switches with multi-section impedance transformation. The differential architecture can provide relief from large voltage swings of the power amplifiers by distributing the voltage stress over the receiver switch with two of the identical or substantially similar single-ended switches. In order to reduce the voltage stress further, multi-section impedance transformations can be used. Degraded insertion loss due to the impedance transformation technique can be compensated by selecting an optimal impedance for the antenna switch operation. Accordingly, the use of the multi-section impedance transformations with the differential antenna switch architecture enables high power handling capability for the antenna switch with acceptable efficiency for the transmitter module.Type: ApplicationFiled: May 4, 2010Publication date: November 10, 2011Applicant: SAMSUNG ELECTRO-MECHANICS COMPANYInventors: Minsik Ahn, Chang-Ho Lee
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Patent number: 8044540Abstract: A SPDT or SPMT switch may include a transformer having a primary winding and a secondary winding, where a first end of the secondary winding is connected to a single pole port, where a first end of the primary winding is connected to a first throw port; a first switch having a first end and a second end, where the first end is connected to ground; and a second switch, where a second end of the secondary winding is connected to both a second end of the first switch and a first end of the second switch, where a second end of the second switch is connected to a second throw port, where the first switch controls a first communication path between the single pole port and the first throw port, and where the second switch controls a second communication path between the second throw port and the single pole port.Type: GrantFiled: September 23, 2009Date of Patent: October 25, 2011Assignees: Georgia Tech Research Corporation, Samsung Electro-MechanicsInventors: Dong Ho Lee, Minsik Ahn, Kyu Hwan An, Wangmyong Woo, Chang-Ho Lee, Joy Laskar
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Publication number: 20110127849Abstract: A tunable capacitor device may be provided in accordance with example embodiments of the invention. The tunable capacitor device may include a first capacitor; a second capacitor; a third capacitor, where the first, second, and third capacitors are connected in series, wherein the second capacitor is positioned between the first capacitor and the second capacitor; and at least one switch transistor, where the at least one switch transistor is connected in parallel with the second capacitor.Type: ApplicationFiled: November 27, 2009Publication date: June 2, 2011Applicants: SAMSUNG ELECTRO-MECHANICS COMPANY, GEORGIA TECH RESEARCH CORPORATIONInventors: Youngchang Yoon, Hyungwook Kim, Minsik Ahn, Chang-Ho Lee, Joy Laskar
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Publication number: 20110068636Abstract: A SPDT or SPMT switch may include a transformer having a primary winding and a secondary winding, where a first end of the secondary winding is connected to a single pole port, where a first end of the primary winding is connected to a first throw port; a first switch having a first end and a second end, where the first end is connected to ground; and a second switch, where a second end of the secondary winding is connected to both a second end of the first switch and a first end of the second switch, where a second end of the second switch is connected to a second throw port, where the first switch controls a first communication path between the single pole port and the first throw port, and where the second switch controls a second communication path between the second throw port and the single pole port.Type: ApplicationFiled: September 23, 2009Publication date: March 24, 2011Applicant: SAMSUNG ELECTRO-MECHANICS COMPANY, LTD.Inventors: Dong Ho Lee, Minsik Ahn, Kyu Hwan An, Wangmyong Woo, Chang-Ho Lee, Joy Laskar
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Patent number: 7890063Abstract: Embodiments of the invention may provide for a CMOS antenna switch, which may be referred to as a CMOS SP4T switch. The CMOS antenna switch may operate at a plurality of frequencies, perhaps around 900 MHz and 1.9 GHz according to an embodiment of the invention. The CMOS antenna switch may include both a receiver switch and a transmit switch. The receiver switch may utilize a multi-stack transistor with body substrate tuning to block high power signals from the transmit path as well as to maintain low insertion loss at the receiver path. On the other hand, in the transmit switch, a body substrate tuning technique may be applied to maintain high power delivery to the antenna. Example embodiments of the CMOS antenna switch may provide for 31 dBm P 1 dB at both bands (e.g., 900 MHz and 1.8 GHz). In addition, a 0.9 dB and ?1.1 dB insertion loss at 900 MHz and 1.9 GHz, respectively, may be obtained according to example embodiments of the invention.Type: GrantFiled: September 18, 2007Date of Patent: February 15, 2011Assignees: Samsung Electro-Mechanics, Georgia Tech Research CorporationInventors: Minsik Ahn, Chang-Ho Lee, Changhyuk Cho, Jaejoon Chang, Wangmyong Woo, Haksun Kim, Joy Laskar