Patents by Inventor Dinesh Somasekhar

Dinesh Somasekhar 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: 20060014331
    Abstract: A floating-body dynamic random access memory device may include a semiconductor body having a top surface and laterally opposite sidewalls formed on a substrate. A gate dielectric layer may be formed on the top surface of the semiconductor body and on the laterally opposite sidewalls of the semiconductor body. A gate electrode may be formed on the gate dielectric on the top surface of the semiconductor body and adjacent to the gate dielectric on the laterally opposite sidewalls of the semiconductor body. The gate electrode may only partially deplete a region of the semiconductor body, and the partially depleted region may be used as a storage node for logic states.
    Type: Application
    Filed: June 30, 2004
    Publication date: January 19, 2006
    Applicant: Intel Corporation
    Inventors: Stephen Tang, Ali Keshavarzi, Dinesh Somasekhar, Fabrice Paillet, Muhammad Khellah, Yibin Ye, Shih-Lien Lu, Brian Doyle, Suman Datta, Vivek De
  • Patent number: 6985380
    Abstract: A SRAM memory cell comprising cross-coupled inverters, each cross-coupled inverter comprising a pull-up transistor, where the pull-up transistors are forward body biased during read operations. Forward body biasing improves the read stability of the memory cell. Other embodiments are described and claimed.
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: January 10, 2006
    Assignee: Intel Corporation
    Inventors: Muhammad M. Khellah, Dinesh Somasekhar, Yibin Ye, Ali R. Farhang, Gunjan H. Pandya, Vivek K. De
  • Publication number: 20060002211
    Abstract: A two transistor memory cell includes a write transistor and a read transistor. When reading the memory cell, the read transistor is turned on, and a voltage develops on a read bit line.
    Type: Application
    Filed: June 30, 2004
    Publication date: January 5, 2006
    Inventors: Yibin Ye, Dinesh Somasekhar, Muhammad Khellah, Fabrice Paillet, Stephen Tang, Ali Keshavarzi, Shih-Lien Lu, Vivek De
  • Patent number: 6982589
    Abstract: A multiplexer includes a first stage that has tri-state buffers each of which has split outputs and a final stage that has a tri-state buffer with an output. The multiplexer includes circuitry configured to enable or disable a signal at an input of a selected one of the first-stage buffers to propagate to the output of the final-stage buffer.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: January 3, 2006
    Assignee: Intel Corporation
    Inventors: Venkat S. Veeramachaneni, Dinesh Somasekhar
  • Publication number: 20050285616
    Abstract: A transistor may have degraded characteristics because of an overvoltage condition. The degraded characteristics may be sensed to determine that the transistor has previously been subjected to an overvoltage condition.
    Type: Application
    Filed: June 29, 2004
    Publication date: December 29, 2005
    Inventors: Ali Keshavarzi, Fabrice Paillet, Muhammad Khellah, Dinesh Somasekhar, Yibin Ye, Stephen Tang, Mohsen Alavi, Vivek De
  • Publication number: 20050226032
    Abstract: A SRAM device is provided having a plurality of memory cells. Each memory cell may include a plurality of transistors coupled in a cross-coupled inverter configuration. An NMOS transistor may be coupled to a body of the two PMOS transistors in the cross-coupled inverter configuration so as to apply a forward body bias to the PMOS transistors of the cross-coupled inverter configuration. A power control unit may control a supply voltage to each of the PMOS transistors as well as apply the switching signal to the NMOS transistor based on a STANDBY mode of the memory cell.
    Type: Application
    Filed: March 31, 2004
    Publication date: October 13, 2005
    Inventors: Stephen Tang, Muhammad Khellah, Dinesh Somasekhar, Yibin Ye, Vivek De, James Tschanz
  • Patent number: 6952376
    Abstract: An apparatus and method for generating a reference in a memory circuit are disclosed. At least two dummy bit-cells are used to generate a reference voltage. One cell has high value stored and the other has a low value stored. The cells are activated and discharged into respective bit-lines. The bit-lines are equalized during the discharge process to generate a reference that is approximately a mid point between a high value cell and a low value cell.
    Type: Grant
    Filed: December 22, 2003
    Date of Patent: October 4, 2005
    Assignee: Intel Corporation
    Inventors: Dinesh Somasekhar, Yibin Ye, Muhammad M. Khellah, Fabrice Paillet, Stephen H. Tang, Ali Keshavarzi, Shih-Lien Lu, Vivek K. De
  • Publication number: 20050213370
    Abstract: A SRAM memory cell comprising cross-coupled inverters, each cross-coupled inverter comprising a pull-up transistor, where the pull-up transistors are forward body biased during read operations. Forward body biasing improves the read stability of the memory cell. Other embodiments are described and claimed.
    Type: Application
    Filed: March 26, 2004
    Publication date: September 29, 2005
    Inventors: Muhammad Khellah, Dinesh Somasekhar, Yibin Ye, Ali Farhang, Gunjan Pandya, Vivek De
  • Publication number: 20050146956
    Abstract: Some embodiments provide pre-charge of a bit-line coupled to a memory cell to a reference voltage using a pre-charge device, discharge of the bit-line based on a value stored by the memory cell, injection during the discharge, of a first current into the bit-line using the pre-charge device, and injection, during the discharge, of a second current into a reference bit-line using a second pre-charge device. Also during the discharge, a difference is sensed between a voltage on the bit-line and a voltage on the reference bit-line.
    Type: Application
    Filed: December 24, 2003
    Publication date: July 7, 2005
    Inventors: Dinesh Somasekhar, Yibin Ye, Muhammad Khellah, Fabrice Paillet, Stephen Tang, Ali Keshavarzi, Shih-Lien Lu, Vivek De
  • Publication number: 20050145935
    Abstract: Some embodiments provide a memory cell comprising a body region doped with charge carriers of a first type, a source region disposed in the body region and doped with charge carriers of a second type, and a drain region disposed in the body region and doped with charge carriers of the second type. According to some embodiments, the body region, the source region, and the drain region are oriented in a first direction, the body region and the source region form a first junction, and the body region and the drain region form a second junction. Moreover, a conductivity of the first junction from the body region to the source region in a case that the first junction is unbiased is substantially less than a conductivity of the second junction from the body region to the drain region in a case that the second junction is unbiased. Some embodiments further include a transistor oriented in a second direction, wherein the second direction is not parallel to the first direction.
    Type: Application
    Filed: December 31, 2003
    Publication date: July 7, 2005
    Inventors: Ali Keshavarzi, Stephen Tang, Dinesh Somasekhar, Fabrice Paillet, Muhammad Khellah, Yibin Ye, Shih-Lien Lu, Vivek De
  • Publication number: 20050145886
    Abstract: Some embodiments provide a memory cell that includes a body region, a source region and a drain region. The body region is doped with charge carriers of a first type, the source region is disposed in the body region and doped with charge carriers of a second type, and the drain region is disposed in the body region and doped with charge carriers of the second type. The body region and the source region form a first junction, the body region and the drain region form a second junction, and a conductivity of the first junction from the body region to the source region in a case that the first junction is unbiased is substantially less than a conductivity of the second junction from the body region to the drain region in a case that the second junction is unbiased.
    Type: Application
    Filed: December 31, 2003
    Publication date: July 7, 2005
    Inventors: Ali Keshavarzi, Stephen Tang, Dinesh Somasekhar, Fabrice Paillet, Muhammad Khellah, Yibin Ye, Shih-Lien Lu, Vivek De
  • Publication number: 20050146921
    Abstract: A two-transistor DRAM cell includes an NMOS device and a PMOS device coupled to the NMOS device.
    Type: Application
    Filed: December 30, 2003
    Publication date: July 7, 2005
    Inventors: Yibin Ye, Dinesh Somasekhar, Muhammad Khellah, Fabrice Paillet, Stephen Tang, Ali Keshavarzi, Shih-Lien Lu, Vivek De
  • Publication number: 20050141290
    Abstract: A DRAM memory cell uses a single transistor to perform the data storage and switching functions of a conventional cell. The transistor has a floating channel body which stores a potential that corresponds to one of two digital data values. The transistor further includes a gate connected to a first word line, a drain connected to a second word line, and a source connected to a bit line. By setting the word and bit lines to specific voltage states, the channel body stores a digital one potential as a result of impact ionization and a digital zero value as a result of forward bias of body-to-source junction.
    Type: Application
    Filed: February 28, 2005
    Publication date: June 30, 2005
    Inventors: Stephen Tang, Ali Keshavarzi, Dinesh Somasekhar, Fabrice Paillet, Muhammad Khellah, Yibin Ye, Vivek De
  • Publication number: 20050135162
    Abstract: An apparatus and method are provided for limiting a drop of a supply voltage in an SRAM device to retain the state of the memory during an IDLE state. The apparatus may include a memory array, a sleep device, and a clamping circuit. The clamping circuit may be configured to activate the sleep device when a voltage drop across the memory array falls below a preset voltage and the memory array is in an IDLE state.
    Type: Application
    Filed: December 18, 2003
    Publication date: June 23, 2005
    Inventors: Dinesh Somasekhar, Muhammad Khellah, Yibin Ye, Vivek De, James Tschanz, Stephen Tang
  • Publication number: 20050135169
    Abstract: An apparatus and method for generating a reference in a memory circuit are disclosed. At least two dummy bit-cells are used to generate a reference voltage. One cell has high value stored and the other has a low value stored. The cells are activated and discharged into respective bit-lines. The bit-lines are equalized during the discharge process to generate a reference that is approximately a mid point between a high value cell and a low value cell.
    Type: Application
    Filed: December 22, 2003
    Publication date: June 23, 2005
    Inventors: Dinesh Somasekhar, Yibin Ye, Muhammad Khellah, Fabrice Paillet, Stephen Tang, Ali Keshavarzi, Shih-Lien Lu, Vivek De
  • Patent number: 6909652
    Abstract: A SRAM with reduced subthreshold leakage current, the SRAM including a pMOSFET with its gate at VSS and its source at VCC, and a diode-connected pMOSFET with its source at VCC, where the drains of the pMOSFET and the diode-connected pMOSFET are connected together to provide a voltage VCCL, where VSS<VCCL<VCC. The beta of the diode-connected pMOSFET is substantially larger than the beta of the pMOSFET. The wordline associated with each memory cell is driven to a voltage ?VEE during a read operation, where ?VEE<VSS and VEE?VCC?VCCL. Each memory cell has cross-coupled inverters to store a data bit, where the cross-coupled inverters have pMOSFETs with their sources at VCCL.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: June 21, 2005
    Assignee: Intel Corporation
    Inventors: Yibin Ye, Dinesh Somasekhar, Muhammad M. Khellah, Vivek K. De
  • Patent number: 6906973
    Abstract: Some embodiments provide pre-charge of a bit-line coupled to a memory cell to a reference voltage using a pre-charge device, discharge of the bit-line based on a value stored by the memory cell, injection during the discharge, of a first current into the bit-line using the pre-charge device, and injection, during the discharge, of a second current into a reference bit-line using a second pre-charge device. Also during the discharge, a difference is sensed between a voltage on the bit-line and a voltage on the reference bit-line.
    Type: Grant
    Filed: December 24, 2003
    Date of Patent: June 14, 2005
    Assignee: Intel Corporation
    Inventors: Dinesh Somasekhar, Yibin Ye, Muhammad M. Khellah, Fabrice Paillet, Stephen H. Tang, Ali Keshavarzi, Shih-Lien L. Lu, Vivek K. De
  • Patent number: 6903984
    Abstract: A DRAM memory cell uses a single transistor to perform the data storage and switching functions of a conventional cell. The transistor has a floating channel body which stores a potential that corresponds to one of two digital data values. The transistor further includes a gate connected to a first word line, a drain connected to a second word line, and a source connected to a bit line. By setting the word and bit lines to specific voltage states, the channel body stores a digital one potential as a result of impact ionization and a digital zero value as a result of forward bias of body-to-source junction.
    Type: Grant
    Filed: December 31, 2003
    Date of Patent: June 7, 2005
    Assignee: Intel Corporation
    Inventors: Stephen Tang, Ali Keshavarzi, Dinesh Somasekhar, Fabrice Paillet, Muhammad Khellah, Yibin Ye, Vivek De
  • Publication number: 20050114618
    Abstract: A short latency and high bandwidth memory includes a systolic memory that is sub-divided into a plurality of memory arrays, including banks and pipelines that access these banks. Shorter latency and faster performance is achieved with this memory, because each bank is smaller in size and is accessed more rapidly. A high throughput rate is accomplished because of the pipelining. Memory is accessed at the pipeline frequency with the proposed read and write mechanism. Design complexity is reduced because each bank within the memory is the same and repeated. The memory array size is re-configured and organized to fit within desired size and area parameters.
    Type: Application
    Filed: November 26, 2003
    Publication date: May 26, 2005
    Inventors: Shih-Lien Lu, Dinesh Somasekhar, Yibin Ye
  • Publication number: 20050111255
    Abstract: Embodiments relate to a Floating Body Dynamic Random Access Memory (FBDRAM). The FBDRAM utilizes a purge line to reset a FBDRAM cell, prior to writing data to the FBDRAM cell.
    Type: Application
    Filed: November 26, 2003
    Publication date: May 26, 2005
    Inventors: Stephen Tang, Ali Keshavarzi, Dinesh Somasekhar, Fabrice Paillet, Muhammad Khellah, Yibin Ye, Shih-Lien Lu, Vivek De