Patents by Inventor Jung-Hyun Choi

Jung-Hyun Choi 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).

  • Publication number: 20160000633
    Abstract: There is provided an upper limb rehabilitation robot including: a base frame that has a side to which a connecting support is rotatably laterally connected; a connecting shaft unit that is rotatably disposed at a side of the connecting support; a link unit that has a side coupled to the connecting shaft unit and the other side with an upper limb connector mounted to enable a person who needs rehabilitation to connect an upper limb; an active actuator that rotates a connecting shaft unit; and a manual actuator that generates resistant torque against rotation to the connecting shaft unit.
    Type: Application
    Filed: December 3, 2014
    Publication date: January 7, 2016
    Inventors: Jinung An, Yoon Gu Kim, Gwang Hee Jang, Jung Hyun Choi
  • Publication number: 20140288215
    Abstract: The present invention relates to an aliphatic-aromatic copolyester resin composition with excellent hydrolysis resistance, wherein an unsaturated compound or an anhydride thereof is introduced into a molecular structure, and specifically, the aliphatic-aromatic copolyester resin composition can be manufactured into all molded products by extrusion, injection and the like, by solving problems with respect to physical properties, processability, reaction rates and water solubility of conventional biological resins.
    Type: Application
    Filed: November 28, 2011
    Publication date: September 25, 2014
    Applicant: Gio-Soltech Co., Ltd.
    Inventors: Ki Cheol Kim, Jung Hyun Choi
  • Publication number: 20140008765
    Abstract: The present invention relates to a polysilicon resistor, a reference voltage circuit including the same, and a method for manufacturing the polysilicon resistor. The polysilicon resistor according includes a first polysilicon resistor and at least one of second polusilicon resistors, coupled to the first polysilicon resistor in series. The first polysilicon resistor and the at least one of the second polysilicon resistors are P-type polysilicon, and a doping concentration of the first polysilicon resistor is different from a doping concentration of the at least one of the second polysilicon resistors. The polysilicon resistor formed by serially coupling the first polysilicon resistor and the at least one of the second polysilicon resistors is applied with a constant current such that a reference voltage or a constant voltage is generated.
    Type: Application
    Filed: September 12, 2013
    Publication date: January 9, 2014
    Applicant: FAIRCHILD KOREA SEMICONDUCTOR LTD.
    Inventor: Jung-Hyun CHOI
  • Publication number: 20130328169
    Abstract: This disclosure is related to a resistive device including a silicide pattern. A resistive device can include a substrate, and a first resistive layer disposed above the substrate. The resistive device can include a second resistive layer disposed on the first resistive layer and has a resistance different from a resistance of the first resistive layer. The resistive device can include a third resistive layer disposed on a first portion of the first resistive layer such that a second portion of the first resistive layer is disposed between the third resistive layer and the second resistive layer. The resistive layer can also include a conductive plug electrically connected to the third resistive layer.
    Type: Application
    Filed: June 11, 2013
    Publication date: December 12, 2013
    Inventor: Jung-hyun CHOI
  • Patent number: 8558608
    Abstract: The present invention relates to a polysilicon resistor, a reference voltage circuit including the same, and a method for manufacturing the polysilicon resistor. The polysilicon resistor according includes a first polysilicon resistor and at least one of second polysilicon resistors, coupled to the first polysilicon resistor in series. The first polysilicon resistor and the at least one of the second polysilicon resistors are P-type polysilicon, and a doping concentration of the first polysilicon resistor is different from a doping concentration of the at least one of the second polysilicon resistors. The polysilicon resistor formed by serially coupling the first polysilicon resistor and the at least one of the second polysilicon resistors is applied with a constant current such that a reference voltage or a constant voltage is generated.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: October 15, 2013
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventor: Jung-Hyun Choi
  • Publication number: 20130033309
    Abstract: The present invention relates to a polysilicon resistor, a reference voltage circuit including the same, and a method for manufacturing the polysilicon resistor. The polysilicon resistor according includes a first polysilicon resistor and at least one of second polysilicon resistors, coupled to the first polysilicon resistor in series. The first polysilicon resistor and the at least one of the second polysilicon resistors are P-type polysilicon, and a doping concentration of the first polysilicon resistor is different from a doping concentration of the at least one of the second polysilicon resistors. The polysilicon resistor formed by serially coupling the first polysilicon resistor and the at least one of the second polysilicon resistors is applied with a constant current such that a reference voltage or a constant voltage is generated.
    Type: Application
    Filed: July 26, 2012
    Publication date: February 7, 2013
    Inventor: Jung-Hyun CHOI
  • Publication number: 20110114474
    Abstract: This invention relates to a method and apparatus for deposition of a diffused thin film, useful in the fabrication of semiconductors and for the surface DC-Bias coating of various tools. In order to coat the surface of a treatment object, such as semiconductors, various molded products, or various tools, with a thin film, one or more process factors selected from among a bias voltage, a gas quantity, an arc power, and a sputtering power are continuously and variably adjusted, whereby the composition ratio of the thin film which is formed on the surface of the treatment object not through a chemical reaction but through a physical method is continuously varied, thus manufacturing a thin film having high hardness. The composition ratio of the thin film to be deposited is selected depending on the end use thereof, thereby depositing the thin film having superior wear resistance, impact resistance, and heat resistance.
    Type: Application
    Filed: November 22, 2007
    Publication date: May 19, 2011
    Inventors: Sang-Youl Bae, Si-Young Choi, Sung-Youp Chung, Jung-Hyun Choi
  • Patent number: 7746129
    Abstract: A low power servo-controlled single clock ramp generator (100) includes a fast switched comparator (102), charge pump (110) and voltage-to-current converter (120) connected to provide a feedback control mechanism under control of a pulse comparison clock signal (pulse_comp) and a reset pulse clock signal (rst_pulse) that are generated from a single input clock signal (clkin) so that there are well defined time intervals between pulses in the pulse comparison clock signal and the reset pulse clock signal, thereby providing a ramp signal (Vramp_out) having a stable, frequency-independent amplitude that is not limited by the reference voltage.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: June 29, 2010
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Jung Hyun Choi, Fernando Chavez Porras
  • Publication number: 20100153079
    Abstract: A method of modeling mismatch of capacitors and devices thereof. Unlike methods of only performing a measurement of capacitor mismatch using a floating gate technique, a method of modeling mismatch may include constructing an analog circuit having capacitors including a different ratio and/or size, and/or measuring capacitor mismatch values. A method of modeling mismatch may include extracting modeling parameters by applying measured mismatch values to a mismatch model, and/or calculating actual capacitor mismatch values by applying extracted modeling parameters and/or a ratio and/or size of actual capacitors to be modeled to a mismatch model. It may be possible to detect characteristics of an analog circuit based on calculated and/or actual capacitor mismatch values.
    Type: Application
    Filed: December 9, 2009
    Publication date: June 17, 2010
    Inventor: Jung-Hyun Choi
  • Patent number: 7647218
    Abstract: Disclosed is a method for detecting properties of a Metal Oxide Silicon (MOS) varactor, which includes: establishing a MOS varactor model equation in conjunction with an area of a gate; calculating values of the coefficients of the MOS varactor model equation through measurements for test materials; and extracting the properties of a capacitor of the MOS varactor using the calculated values of the coefficients. According to the method, the MOS varactor model equation can be expressed by Cgate=[Cigate×Area+Cpgate×Perimeter]×N, wherein, Cgate denotes gate capacitance for voltage applied to the gate, Cigate denotes intrinsic gate capacitance, Cpgate denotes perimeter gate capacitance, and N denotes the number of gate fingers. The MOS varactor model equation can be applicable to various sized capacitors, so that it is possible to estimate a gate capacitance for voltage applied to a gate, considering the differences due to the surface shapes of a device.
    Type: Grant
    Filed: October 24, 2006
    Date of Patent: January 12, 2010
    Assignee: Dongbu Electronics Co., Ltd.
    Inventor: Jung Hyun Choi
  • Publication number: 20090251178
    Abstract: A low power servo-controlled single clock ramp generator (100) includes a fast switched comparator (102), charge pump (110) and voltage-to-current converter (120) connected to provide a feedback control mechanism under control of a pulse comparison clock signal (pulse_comp) and a reset pulse clock signal (rst_pulse) that are generated from a single input clock signal (clkin) so that there are well defined time intervals between pulses in the pulse comparison clock signal and the reset pulse clock signal, thereby providing a ramp signal (Vramp_out) having a stable, frequency-independent amplitude that is not limited by the reference voltage.
    Type: Application
    Filed: April 4, 2008
    Publication date: October 8, 2009
    Inventors: Jung Hyun Choi, Fernando Chavez Porras
  • Patent number: D578988
    Type: Grant
    Filed: December 31, 2007
    Date of Patent: October 21, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin-Man Chung, Jung-Hyun Choi, Seung-Min Park, Chang-Hwan Hwang
  • Patent number: D579439
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: October 28, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin-Man Chung, Jung-Hyun Choi, Seung-Min Park, Chang-Hwan Hwang
  • Patent number: D591259
    Type: Grant
    Filed: July 28, 2008
    Date of Patent: April 28, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jung-Hyun Choi, Sang-Min Hyun, Chang-Hwan Hwang
  • Patent number: D593529
    Type: Grant
    Filed: August 5, 2008
    Date of Patent: June 2, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jung-Hyun Choi, Sang-Min Hyun, Chang-Hwan Hwang
  • Patent number: D601992
    Type: Grant
    Filed: November 18, 2008
    Date of Patent: October 13, 2009
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Jung-Hyun Choi, Seung-Min Park, Seog-Guen Kim
  • Patent number: D603363
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: November 3, 2009
    Assignee: Samsung Electronics, Ltd.
    Inventors: Jung-Hyun Choi, Seung-Min Park, Seog-Guen Kim
  • Patent number: D615061
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: May 4, 2010
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Jung-Hyun Choi, Seung-Min Park, Seog-Guen Kim
  • Patent number: D657334
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: April 10, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jung-Hyun Choi
  • Patent number: D721375
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: January 20, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jung-Hyun Choi, Jin-Soo Kim