Patents by Inventor Lee Cheng Hung

Lee Cheng Hung 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: 8565009
    Abstract: Mechanisms for improving static noise margin and/or reducing misread current in multi-port devices are disclosed. In some embodiments related to dual port SRAM a suppress device (e.g., transistor) is provided at each word line port. When both ports are activated, both suppress devices are on and lower the voltage level of these ports, which in turn lower the voltage level at the node storing the data for the memory. As the voltage level at the data node is lowered, noise margin is improved and read disturb can be avoided.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: October 22, 2013
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Ching-Wei Wu, Lee Cheng Hung, Hung-Je Liao, Jui-Che Tsai
  • Patent number: 8427888
    Abstract: A representative circuit device includes a local control circuit having a level shifter, wherein in response to receipt of a first address signal the level shifter shifts the first address signal from a first voltage level to a second voltage level, providing a level shifted first address signal; and a word-line driver having at least one input for receiving a plurality of address signals, wherein the at least one input includes a first input that is coupled to the local control circuit to receive the level shifted first address signal, and an output that is electrically coupled to a word line of a memory cell array.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: April 23, 2013
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Chung-Ji Lu, Lee-Cheng Hung, Hung-Jen Liao, Hsu-Shun Chen, Hong-Chen Cheng, Chung-Yi Wu, Uppu Sharath Chandra
  • Publication number: 20110194362
    Abstract: A representative circuit device includes a local control circuit having a level shifter, wherein in response to receipt of a first address signal the level shifter shifts the first address signal from a first voltage level to a second voltage level, providing a level shifted first address signal; and a word-line driver having at least one input for receiving a plurality of address signals, wherein the at least one input includes a first input that is coupled to the local control circuit to receive the level shifted first address signal, and an output that is electrically coupled to a word line of a memory cell array.
    Type: Application
    Filed: February 9, 2010
    Publication date: August 11, 2011
    Applicant: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
    Inventors: Chung-Ji LU, Lee-Cheng HUNG, Hung-Jen LIAO, Hsu-Shun CHEN, Hong-Chen CHENG, Chung-Yi Wu, Uppu Sharath CHANDRA
  • Publication number: 20100271898
    Abstract: Mechanisms for improving static noise margin and/or reducing misread current in multi-port devices are disclosed. In some embodiments related to dual port SRAM a suppress device (e.g., transistor) is provided at each word line port. When both ports are activated, both suppress devices are on and lower the voltage level of these ports, which in turn lower the voltage level at the node storing the data for the memory. As the voltage level at the data node is lowered, noise margin is improved and read disturb can be avoided.
    Type: Application
    Filed: April 27, 2010
    Publication date: October 28, 2010
    Applicant: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
    Inventors: Ching-Wei WU, Lee Cheng HUNG, Hung-Je LIAO, Jui-Che TSAI
  • Patent number: 7639551
    Abstract: A semiconductor device includes a first sense amplifier coupled to an input for generating a first output; a second sense amplifier couple to the input for generating a second output; and a third sense amplifier coupled to the input for generating a third output, wherein a fourth output amplifying the input is generated based on combinations of logic states of the first, second and third outputs.
    Type: Grant
    Filed: April 18, 2007
    Date of Patent: December 29, 2009
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Chia-Wei Wang, Hong-Chen Cheng, Lee Cheng Hung, Hung-Jen Liao
  • Publication number: 20080258813
    Abstract: A semiconductor device includes a first sense amplifier coupled to an input for generating a first output; a second sense amplifier couple to the input for generating a second output; and a third sense amplifier coupled to the input for generating a third output, wherein a fourth output amplifying the input is generated based on combinations of logic states of the first, second and third outputs.
    Type: Application
    Filed: April 18, 2007
    Publication date: October 23, 2008
    Inventors: Chia-Wei Wang, Hong-Chen Cheng, Lee Cheng Hung, Hung-Jen Liao
  • Patent number: 7298180
    Abstract: A latch type sense amplifier includes a latch unit, an amplifying unit and a circuit module for charging or discharging the latch unit. The latch unit is configured by two sets of serially coupled PMOS and NMOS transistors, whose gates and drains are cross-coupled. The amplifying unit is coupled between the latch unit and a complementary power supply for controlling the latch unit in response to a bit line signal and a complementary bit line signal. The circuit module is designed to charge or discharge the data storage node and the complementary data storage node of the latch unit in response to the bit line signal and the complementary bit line signal, without using a current path across the NMOS transistors therein, such that the data storage node and the complementary data storage node are charged or discharged in a manner insensitive to a mismatch between the two NMOS transistors.
    Type: Grant
    Filed: November 17, 2005
    Date of Patent: November 20, 2007
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventor: Lee Cheng Hung