Patents by Inventor Jeonghu Han
Jeonghu Han 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: 8378749Abstract: Systems and methods may include an amplifier having at least a first input port, where the amplifier includes a first capacitance associated with the first input port; a first bias circuit, where the first bias circuit comprises a series connection of a first charging circuit and a first discharging circuit, wherein a first node between the first charging circuit and the first discharging circuit is connected to the first input port, wherein responsive to an RF input signal having at least a first predetermined level being received at the first input port, the first charging circuit charges the first capacitance associated with the first input port during a first portion of a cycle of the RF input signal, and discharges the first capacitance associated with the first input port during a second portion of the cycle, thereby controlling a DC bias voltage level available at the first input port.Type: GrantFiled: July 29, 2011Date of Patent: February 19, 2013Assignee: Samsung Electro-MechanicsInventors: Woonyun Kim, Jeonghu Han, Ki Seok Yang, Jae Joon Chang, Chang-Ho Lee
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Publication number: 20130027135Abstract: Systems and methods may include an amplifier having at least a first input port, where the amplifier includes a first capacitance associated with the first input port; a first bias circuit, where the first bias circuit comprises a series connection of a first charging circuit and a first discharging circuit, wherein a first node between the first charging circuit and the first discharging circuit is connected to the first input port, wherein responsive to an RF input signal having at least a first predetermined level being received at the first input port, the first charging circuit charges the first capacitance associated with the first input port during a first portion of a cycle of the RF input signal, and discharges the first capacitance associated with the first input port during a second portion of the cycle, thereby controlling a DC bias voltage level available at the first input port.Type: ApplicationFiled: July 29, 2011Publication date: January 31, 2013Applicant: SAMSUNG ELECTRO-MECHANICS COMPANYInventors: Woonyun Kim, Jeonghu Han, Ki Seok Yang, Jae Joon Chang, Chang-Ho Lee
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Publication number: 20120194150Abstract: Systems and methods may include a low-dropout (LDO) voltage regulator for portable communication devices. The systems and methods may include a comparator having first and second inputs and generating a control voltage, the first input receiving a battery voltage from a battery source, the second input receiving a fixed voltage independent from the battery voltage, and a power management circuit that receives the control voltage and provides a regulated voltage based upon the control voltage, wherein when the received battery voltage is above the fixed voltage, the control voltage is provided at a high constant voltage, thereby resulting in the regulated voltage being at a first voltage, and wherein when the battery voltage is below the fixed voltage, the control voltage is provided at a low constant voltage, thereby resulting in the regulated voltage being at a second voltage less than the first voltage.Type: ApplicationFiled: February 1, 2011Publication date: August 2, 2012Applicant: SAMSUNG ELECTRO-MECHANICS COMPANYInventors: Jaejoon Chang, Ki Seok Yang, Jeonghu Han, Woonyun Kim, Chang-Ho Lee
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Patent number: 8044759Abstract: Systems and methods are provided for overlapping compact multiple transformers.Type: GrantFiled: October 12, 2010Date of Patent: October 25, 2011Assignees: Samsung Electro-Mechanics, Georgia Tech Research CorporationInventors: Ki Seok Yang, Jeonghu Han, Jaejoon Chang, Woonyun Kim, Chang-Ho Lee
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Patent number: 7944293Abstract: Systems and methods for providing an adaptive bias circuit that may include a differential amplifier, low-pass filter, and common source amplifier or common emitter amplifier. The adaptive bias circuit may generate an adaptive bias output signal depending on input signal power level. As the input power level goes up, the adaptive bias circuit may increase the bias voltage or bias current of the adaptive bias output signal. A power amplifier (e.g., a differential amplifier) may be biased according to the adaptive bias output signal in order to reduce current consumption at low power operation levels.Type: GrantFiled: November 17, 2009Date of Patent: May 17, 2011Assignees: Samsung Electro-Mechanics Company, Ltd., Georgia Tech Research CorporationInventors: Dong Ho Lee, Kyu Hwan An, Jeonghu Han, Chang-Ho Lee, Joy Laskar
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Patent number: 7936215Abstract: Embodiments of the invention may provide for power amplifier systems and methods. The systems and methods may include a power amplifier that generates a first differential output signal and a second differential output signal, a primary winding comprised of a plurality of primary segments, where a first end of each primary segment is connected to a first common input port and a second end of each primary segment is connected to a second common input port, where the first common input port is operative to receive the first differential output signal, and where the second common input port is operative to receive the second differential output signal, and a single secondary winding inductively coupled to the plurality of primary segments.Type: GrantFiled: April 1, 2009Date of Patent: May 3, 2011Assignees: Samsung-Electro Mechanics, Georgia Tech Research CorporationInventors: Chang-Ho Lee, Ockgoo Lee, Jeonghu Han, Kyu Hwan An, Hyungwook Kim, Dong Ho Lee, Ki Seok Yang, Haksun Kim, Joy Laskar
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Publication number: 20110043316Abstract: Systems and methods are provided for overlapping compact multiple transformers.Type: ApplicationFiled: October 12, 2010Publication date: February 24, 2011Inventors: Ki Seok Yang, Jeonghu Han, Jaejoon Chang, Woonyun Kim, Chang-Ho Lee
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Publication number: 20100148871Abstract: Systems and methods for providing an adaptive bias circuit that may include a differential amplifier, low-pass filter, and common source amplifier or common emitter amplifier. The adaptive bias circuit may generate an adaptive bias output signal depending on input signal power level. As the input power level goes up, the adaptive bias circuit may increase the bias voltage or bias current of the adaptive bias output signal. A power amplifier (e.g., a differential amplifier) may be biased according to the adaptive bias output signal in order to reduce current consumption at low power operation levels.Type: ApplicationFiled: November 17, 2009Publication date: June 17, 2010Applicant: SAMSUNG ELECTRO-MECHANICS COMPANYInventors: Dong Ho Lee, Kyu Hwan An, Jeonghu Han, Chang-Ho Lee, Joy Laskar
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Patent number: 7576607Abstract: Embodiments of the invention may provide for power amplifier systems and methods. The systems and methods may include a power amplifier that generates a first differential output signal and a second differential output signal, a primary winding comprised of a plurality of primary segments, where a first end of each primary segment is connected to a first common input port and a second end of each primary segment is connected to a second common input port, where the first common input port is operative to receive the first differential output signal, and where the second common input port is operative to receive the second differential output signal, and a single secondary winding inductively coupled to the plurality of primary segments.Type: GrantFiled: January 3, 2008Date of Patent: August 18, 2009Assignees: Samsung Electro-Mechanics, Georgia Tech Research CorporationInventors: Chang-Ho Lee, Ockgoo Lee, Jeonghu Han, Kyu Hwan An, Hyungwook Kim, Dong Ho Lee, Ki Seok Yang, Haksun Kim, Joy Laskar
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Publication number: 20090184786Abstract: Embodiments of the invention may provide for power amplifier systems and methods. The systems and methods may include a power amplifier that generates a first differential output signal and a second differential output signal, a primary winding comprised of a plurality of primary segments, where a first end of each primary segment is connected to a first common input port and a second end of each primary segment is connected to a second common input port, where the first common input port is operative to receive the first differential output signal, and where the second common input port is operative to receive the second differential output signal, and a single secondary winding inductively coupled to the plurality of primary segments.Type: ApplicationFiled: April 1, 2009Publication date: July 23, 2009Inventors: Chang-Ho Lee, Ockgoo Lee, Jeonghu Han, Kyu Hwan An, Hyungwook Kim, Dong Ho Lee, Ki Seok Yang, Haksun Kim, Joy Laskar
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Patent number: 7560994Abstract: Example embodiments of the invention may provide systems and methods for a power amplifier. The systems and methods may include a first common-source device having a first source, a first gate, a first drain, and a first body, where the first source is connected to the first body, and wherein the first gate is connected to an input port. The systems and methods may further include a second common-gate device having a second source, a second gate, a second drain, and a second body, where the second source is connected to the first drain, where the second source is further connected to the second body, and where the second drain is connected to an output port.Type: GrantFiled: January 3, 2008Date of Patent: July 14, 2009Assignees: Samsung Electro-Mechanics Company, Georgia Tech Research CorporationInventors: Ockgoo Lee, Jeonghu Han, Kyu Hwan An, Hyungwook Kim, Dong Ho Lee, Ki Seok Yang, Chang-Ho Lee, Haksun Kim, Joy Laskar
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Publication number: 20090174477Abstract: Embodiments of the invention may provide for power amplifier systems and methods. The systems and methods may include a power amplifier that generates a first differential output signal and a second differential output signal, a primary winding comprised of a plurality of primary segments, where a first end of each primary segment is connected to a first common input port and a second end of each primary segment is connected to a second common input port, where the first common input port is operative to receive the first differential output signal, and where the second common input port is operative to receive the second differential output signal, and a single secondary winding inductively coupled to the plurality of primary segments.Type: ApplicationFiled: January 3, 2008Publication date: July 9, 2009Inventors: Chang-Ho Lee, Ockgoo Lee, Jeonghu Han, Kyu Hwan An, Hyungwook Kim, Dong Ho Lee, Ki Seok Yang, Haksun Kim, Joy Laskar
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Publication number: 20090174480Abstract: Example embodiments of the invention may provide systems and methods for a power amplifier. The systems and methods may include a first common-source device having a first source, a first gate, a first drain, and a first body, where the first source is connected to the first body, and wherein the first gate is connected to an input port. The systems and methods may further include a second common-gate device having a second source, a second gate, a second drain, and a second body, where the second source is connected to the first drain, where the second source is further connected to the second body, and where the second drain is connected to an output port.Type: ApplicationFiled: January 3, 2008Publication date: July 9, 2009Inventors: Ockgoo Lee, Jeonghu Han, Kyu Hwan An, Hyungwook Kim, Dong Ho Lee, Ki Seok Yang, Chang-Ho Lee, Haksun Kim, Joy Laskar