Patents by Inventor Demi SHEN

Demi SHEN 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: 10249361
    Abstract: A subsystem configured to write data to a static random access memory cell employs a single N-channel MOS device connected to ground in each leg of the bi-stable memory cell to overdrive the stored data. The subsystem implements the dual control required to effect matrix operation of the SRAM cell in the gate circuit of the single N-channel MOS device in the drive path. Specifically, the column select signal controls a semiconductor junction that interrupts the data connection to the gate. In this manner, the column select control is removed from the drive path, thus increasing drive strength. Further, a second semiconductor junction connects the gate of the single NMOS device in the drive path when the gate signal is interrupted.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: April 2, 2019
    Assignee: NVIDIA CORPORATION
    Inventors: Eugene Wang, Gavin Chen, Demi Shen
  • Patent number: 9240232
    Abstract: A subsystem configured to write data to a static random access memory cell employs a single N-channel MOS device connected to ground in each leg of the bi-stable memory cell to overdrive the stored data. The subsystem implements the dual control required to effect matrix operation of the SRAM cell in the gate circuit of the single N-channel MOS device in the drive path. Specifically, the column select signal controls a semiconductor junction that interrupts the data connection to the gate. In this manner, the column select control is removed from the drive path, thus increasing drive strength. Further, a second semiconductor junction connects the gate of the single NMOS device in the drive path when the gate signal is interrupted.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: January 19, 2016
    Assignee: NVIDIA Corporation
    Inventors: Eugene Wang, Gavin Chen, Demi Shen
  • Publication number: 20150200006
    Abstract: A subsystem configured to write data to a static random access memory cell employs a single N-channel MOS device connected to ground in each leg of the bi-stable memory cell to overdrive the stored data. The subsystem implements the dual control required to effect matrix operation of the SRAM cell in the gate circuit of the single N-channel MOS device in the drive path. Specifically, the column select signal controls a semiconductor junction that interrupts the data connection to the gate. In this manner, the column select control is removed from the drive path, thus increasing drive strength. Further, a second semiconductor junction connects the gate of the single NMOS device in the drive path when the gate signal is interrupted.
    Type: Application
    Filed: January 14, 2014
    Publication date: July 16, 2015
    Applicant: NVIDIA CORPORATION
    Inventors: Eugene WANG, Gavin CHEN, Demi SHEN
  • Patent number: 8988960
    Abstract: A static random-access memory (SRAM) module includes a column select (RSEL) driver coupled to an input/output (I/O) circuit by an RSEL line. The I/O circuit is configured to read bit line signals from a bit cell within the SRAM module. During a read operation, the RSEL driver pulls the RSEL line to zero in order to cause p-type metal-oxide-semiconductors (PMOSs) within the I/O circuit to sample the bit line signals output by the bit cell. In response, an aggressor driver drives the RSEL line to a negative voltage, thereby reducing the resistance of the PMOSs within the I/O circuit.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: March 24, 2015
    Assignee: NVIDIA Corporation
    Inventors: Yongchang Huang, Jiping Ma, Demi Shen
  • Publication number: 20140146628
    Abstract: A static random-access memory (SRAM) module includes a column select (RSEL) driver coupled to an input/output (I/O) circuit by an RSEL line. The I/O circuit is configured to read bit line signals from a bit cell within the SRAM module. During a read operation, the RSEL driver pulls the RSEL line to zero in order to cause p-type metal-oxide-semiconductors (PMOSs) within the I/O circuit to sample the bit line signals output by the bit cell. In response, an aggressor driver drives the RSEL line to a negative voltage, thereby reducing the resistance of the PMOSs within the I/O circuit.
    Type: Application
    Filed: November 29, 2012
    Publication date: May 29, 2014
    Applicant: NVIDIA CORPORATION
    Inventors: Yongchang HUANG, Jiping MA, Demi SHEN