Patents by Inventor Jae-Joon Kim

Jae-Joon Kim 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).

  • Patent number: 7328413
    Abstract: A device and method for increasing the read stability of a memory device includes sizing a sleep transistor according to a size ratio of the transistor relative to a driver transistor forming part of the memory device based on a static noise margin value. A leakage reduction circuit and method includes reducing a voltage via a current leakage of a transistor to track the leakage of the memory cells and generating a sleep signal if the voltage drops below a predetermined threshold.
    Type: Grant
    Filed: February 25, 2005
    Date of Patent: February 5, 2008
    Assignee: Purdue Research Foundation
    Inventors: Hyung-il Kim, Jae-Joon Kim, Kaushik Roy
  • Patent number: 7313012
    Abstract: Techniques are provided for back-gate control in an asymmetrical memory cell. In one aspect, the cell includes five transistors and can be employed for static random access memory (SRAM) applications. An inventive memory circuit can include a plurality of bit line structures, a plurality of word line structures that intersect the plurality of bit line structures to form a plurality of cell locations, and a plurality of cells located at the plurality of cell locations. Each cell can be selectively coupled to a corresponding one of the bit line structures under control of a corresponding one of the word line structures. Each cell can include a first inverter having first and second field effect transistors (FETS) and a second inverter with third and fourth FETS that is cross-coupled to the first inverter to form a storage flip-flop. One of the FETS in the first inverter can be configured with independent front and back gates and can function as both an access transistor and part of one of the inverters.
    Type: Grant
    Filed: February 27, 2006
    Date of Patent: December 25, 2007
    Assignee: International Business Machines Corporation
    Inventors: Ching-Te Chuang, Jae-Joon Kim, Keunwoo Kim
  • Publication number: 20070236982
    Abstract: Techniques are provided for asymmetrical SRAM cells which can be improved, for example, by providing one or more of improved read stability and improved write performance and margin. A first inverter and a second inverter are cross-coupled and configured for selective coupling to true and complementary bit lines under control of read and write word lines. The first inverter is formed by a first, n-type, FET (NFET) and a second, p-type, FET (PFET). Process and/or technology approaches can be employed to adjust the relative strength of the FETS to obtain, for example, read margin, write margin, and/or write performance improvements.
    Type: Application
    Filed: March 29, 2006
    Publication date: October 11, 2007
    Applicant: International Business Machines Corporation
    Inventors: Ching-Te Chuang, Jae-Joon Kim, Keunwoo Kim
  • Publication number: 20070201261
    Abstract: Techniques are provided for employing independent gate control in asymmetrical memory cells. A memory circuit, such as an SRAM circuit, can include a number of bit line structures, a number of word line structures that intersect the bit line structures to form a number of cell locations, and a number of asymmetrical memory cells located at the cell locations. Each of the asymmetrical cells can be selectively coupled to a corresponding one of the bit line structures under control of a corresponding one of the word line structures. Each of the cells can include a number of field effect transistors (FETS), and at least one of the FETS can be configured with separately biased front and back gates. One gate can be biased separately from the other gate in a predetermined manner to enhance read stability of the asymmetrical cell.
    Type: Application
    Filed: February 27, 2006
    Publication date: August 30, 2007
    Applicant: International Business Machines Corporation
    Inventors: Ching-Te Chuang, Jae-Joon Kim, Keunwoo Kim
  • Publication number: 20070201273
    Abstract: Techniques are provided for back-gate control in an asymmetrical memory cell. In one aspect, the cell includes five transistors and can be employed for static random access memory (SRAM) applications. An inventive memory circuit can include a plurality of bit line structures, a plurality of word line structures that intersect the plurality of bit line structures to form a plurality of cell locations, and a plurality of cells located at the plurality of cell locations. Each cell can be selectively coupled to a corresponding one of the bit line structures under control of a corresponding one of the word line structures. Each cell can include a first inverter having first and second field effect transistors (FETS) and a second inverter with third and fourth FETS that is cross-coupled to the first inverter to form a storage flip-flop. One of the FETS in the first inverter can be configured with independent front and back gates and can function as both an access transistor and part of one of the inverters.
    Type: Application
    Filed: February 27, 2006
    Publication date: August 30, 2007
    Applicant: International Business Machines Corporation
    Inventors: Ching-Te Chuang, Jae-Joon Kim, Keunwoo Kim
  • Patent number: 7177177
    Abstract: An eight transistor static random access memory (SRAM)device includes first and second inverters, a first bit line, a first complement bit line, a pair of write access transistors, and a pair of read access transistors. Each of the first and second inverters includes a respective pair of transistors, and has a respective data node. Each of a first and a second of the access transistors has a source, a drain, a front gate, and a back gate. The first access transistor is coupled to the first bit line, and the second access transistor is coupled to the first complement bit line. The back gate of the first access transistor is coupled to the data node of the first inverter; and the back gate of the second access transistor is coupled to the data node of the second inverter. This increases the difference between the threshold voltages of the first and second access transistors.
    Type: Grant
    Filed: April 7, 2005
    Date of Patent: February 13, 2007
    Assignee: International Business Machines Corporation
    Inventors: Ching-Te Kent Chuang, Jae-Joon Kim, Keunwoo Kim
  • Publication number: 20060239334
    Abstract: This invention is concerned with a transmission control method and apparatus in a collision interval for a collision of multidimensional hopping patterns. In the present invention, each orthogonal wireless resource in the coordinate of the multidimensional orthogonal resource can hop according to the hopping pattern negotiated between a transmitter and a receiver, and each corresponding channel is distinguished by the hopping pattern. A specific multidimensional hopping pattern is allocated to each secondary station. The hopping pattern is either permanently allocated to the secondary stations or temporarily allocated from the primary station during a call set-up. The permanent allocation of the hopping pattern to the secondary stations is achieved when the hopping pattern is identified based on a unique identifier, such as ESN of the secondary station.
    Type: Application
    Filed: September 18, 2002
    Publication date: October 26, 2006
    Inventors: Jae-Kyun Kwon, Kang-Soo Shin, Jae-Hoon Chung, Ji-Young Yun, Sung-Ho Moon, Soo-Mee Park, Dan-Keun Sung, Su-Won Park, Mun-Geon Kyeong, Jae-Sang Cha, Seo-Young Lee, Seog-Ill Song, In-Soo Sohn, Ju-Phil Cho, Jae-Joon Kim, Hee-Soo Lee
  • Publication number: 20060227595
    Abstract: Disclosed is an eight transistor static random access memory (SRAM) device, comprising first and second inverters, a first bit line, a first complement bit line, a pair of write access transistors, and a pair of read access transistors. Each of the first and second inverters includes a respective pair of transistors, and has a respective data node. Each of a first and a second of the access transistors has a source, a drain, a front gate, and a back gate. The first access transistor is coupled to the first bit line, and the second access transistor is coupled to the first complement bit line. The back gate of the first access transistor is coupled to the data node of the first inverter; and the back gate of the second access transistor is coupled to the data node of the second inverter. This increases the difference between the threshold voltages of the first and second access transistors.
    Type: Application
    Filed: April 7, 2005
    Publication date: October 12, 2006
    Applicant: International Business Machines Corporation
    Inventors: Ching-Te Chuang, Jae-Joon Kim, Keunwoo Kim
  • Publication number: 20060206739
    Abstract: A device and method for increasing the read stability of a memory device includes sizing a sleep transistor according to a size ratio of the transistor relative to a driver transistor forming part of the memory device based on a static noise margin value. A leakage reduction circuit and method includes reducing a voltage via a current leakage of a transistor to track the leakage of the memory cells and generating a sleep signal if the voltage drops below a predetermined threshold.
    Type: Application
    Filed: February 25, 2005
    Publication date: September 14, 2006
    Inventors: Hyung-il Kim, Jae-Joon Kim, Kaushik Roy
  • Patent number: 7085798
    Abstract: A 64-bit adder implemented in partially depleted silicon on insulator technology and having two levels of lookahead uses a dynamic eight-bit carry module containing a differential pass-gate evaluation tree employing a chain of source followers that feeds a sense amplifier, thereby obtaining benefits from high initial drive, low variation in body voltage, resulting in low variation in history-dependent delay, reduced noise sensitivity and noise-based delay.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: August 1, 2006
    Assignee: International Business Machines Corporation
    Inventors: Jae-Joon Kim, Ching-Te K. Chuang, Rajiv V. Joshi, Kaushik Roy
  • Publication number: 20060081936
    Abstract: A semiconductor device for low power operation includes a channel region having a channel length greater than a standard minimum channel length. The voltage supply of the device is less than the threshold voltage of the device. A gate terminal of the device may have a raised height relative to a source and drain region of the device. In one embodiment, the semiconductor device is a double gate metal-oxide field effect transistor.
    Type: Application
    Filed: September 16, 2005
    Publication date: April 20, 2006
    Inventors: Jae-Joon Kim, Kaushik Roy
  • Publication number: 20050259147
    Abstract: An apparatus and method for adapting 2D and 3D stereoscopic video signal. The apparatus for adapting 2D and 3D stereoscopic video signal provides a user with the best experience of digital contents by adapting the digital contents to a particular usage environment including the user characteristic and terminal characteristic. The apparatus allows the efficient delivery of video contents associated with user's adaptation request.
    Type: Application
    Filed: July 16, 2003
    Publication date: November 24, 2005
    Inventors: JeHo Nam, Jin-Woo Hong, Hae-Kwang Kim, Rin-Chul Kim, Nam-Ik Cho, Jae-Joon Kim, Man-Bae Kim, Hyoung-Joong Kim
  • Publication number: 20050105796
    Abstract: Disclosed are a method and a system that adaptively transform visual contents inputted from a network, in accordance with the visual characteristics of a terminal user. A visual characteristics descriptor that describes the information of the user visual characteristics in a predetermined format is proposed. The descriptor includes the information of the color vision deficiency type and the color vision deficiency degree. The color vision deficiency may be described in numerical degree or textual degree. The invention adaptively transforms visual contents differently in accordance with the color vision deficiency type.
    Type: Application
    Filed: April 14, 2003
    Publication date: May 19, 2005
    Inventors: Jin-Woo Hong, Seung-Ji Yang, Jae-Ii Song, Yong-Man Ro, Je-ho Nam, Jin-Woong Kim, Jae-Joon Kim, Cheon-Seog Kim
  • Patent number: 6789099
    Abstract: A 64-bit adder implemented in partially depleted silicon on insulator technology and having two levels of lookahead uses a dynamic eight-bit carry module containing a cascode evaluation tree employing a chain of source followers that feeds a sense amplifier, thereby obtaining benefits from high initial drive, low variation in body voltage, resulting in low variation in history-dependent delay, reduced noise sensitivity and noise-based delay.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: September 7, 2004
    Assignee: International Business Machines Corporation
    Inventors: Jae-Joon Kim, Ching-Te K. Chuang, Rajiv V. Joshi, Kaushik Roy
  • Publication number: 20040073592
    Abstract: A 64-bit adder implemented in partially depleted silicon on insulator technology and having two levels of lookahead uses a dynamic eight-bit carry module containing a cascode evaluation tree employing a chain of source followers that feeds a sense amplifier, thereby obtaining benefits from high initial drive, low variation in body voltage, resulting in low variation in history-dependent delay, reduced noise sensitivity and noise-based delay.
    Type: Application
    Filed: June 10, 2002
    Publication date: April 15, 2004
    Applicant: International Business Machines Corporation
    Inventors: Jae-Joon Kim, Ching-Te K. Chuang, Rajiv V. Joshi, Kaushik Roy
  • Publication number: 20030229661
    Abstract: A 64-bit adder implemented in partially depleted silicon on insulator technology and having two levels of lookahead uses a dynamic eight-bit carry module containing a differential pass-gate evaluation tree employing a chain of source followers that feeds a sense amplifier, thereby obtaining benefits from high initial drive, low variation in body voltage, resulting in low variation in history-dependent delay, reduced noise sensitivity and noise-based delay.
    Type: Application
    Filed: June 10, 2002
    Publication date: December 11, 2003
    Applicant: International Business Machines Corporation
    Inventors: Jae-Joon Kim, Ching-Te K. Chuang, Rajiv V. Joshi, Kaushik Roy