Patents by Inventor Sreedhar Natarajan

Sreedhar Natarajan 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: 7590017
    Abstract: Circuits and method for precharging a pair of complementary bitlines in a dynamic random access memory (DRAM). Both bitlines are precharged to VDD during a precharge phase, and during a sensing phase, the voltage of one of the pair of complementary bitlines is adjusted from VDD to a reference level. The reference level is generated by coupling the one of the pair of complementary bitlines to a capacitance means located within a reference voltage circuit. The reference voltage circuit can include one capacitor element or a plurality of capacitor elements connected in parallel with each other. Any number of the plurality of capacitor elements can be selectively enabled.
    Type: Grant
    Filed: April 12, 2007
    Date of Patent: September 15, 2009
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Sergiy Romanovskyy, Sreedhar Natarajan
  • Publication number: 20070242543
    Abstract: Circuits and method for precharging a pair of complementary bitlines in a dynamic random access memory (DRAM). Both bitlines are precharged to VDD during a precharge phase, and during a sensing phase, the voltage of one of the pair of complementary bitlines is adjusted from VDD to a reference level. The reference level is generated by coupling the one of the pair of complementary bitlines to a capacitance means located within a reference voltage circuit. The reference voltage circuit can include one capacitor element or a plurality of capacitor elements connected in parallel with each other. Any number of the plurality of capacitor elements can be selectively enabled.
    Type: Application
    Filed: April 12, 2007
    Publication date: October 18, 2007
    Applicant: EMERGING MEMORY TECHNOLOGIES INC.
    Inventors: Sergiy ROMANOVSKYY, Sreedhar NATARAJAN
  • Patent number: 6628540
    Abstract: Quiescent current drawn by an array of four-transistor loadless static random access memory (SRAM) cells is minimized by using a negative feedback loop to set a reference voltage, for the wordline driver, to a level which reduces the subthreshold current through the pass transistors to a level which is just barely sufficient to reliably retain data.
    Type: Grant
    Filed: December 31, 2001
    Date of Patent: September 30, 2003
    Assignee: Texas Instruments Incorporated
    Inventors: Andrew Marshall, Theodore W. Houston, Sreedhar Natarajan
  • Patent number: 6598214
    Abstract: A method (40) of designing a circuit comprising a plurality of transistors (10, 46T, 60T). Each transistor of the plurality of transistors comprises an active region, a gate (G1, G2), a first source/drain (S/D1, S/D3) in the active region, a second source/drain in the active region, and at least one contact in each of the first source/drain and the second source/drain. The method comprises various steps. The method specifies a first set of distances for each transistor in a first set (10) of transistors in the plurality of transistors, wherein the first set of distances comprises a gate length (Lg), a gate width (Wg), and a distance representative of one or both of a first contact-to-edge distance (CTE1) and a first contact-to-gate distance (CTG1).
    Type: Grant
    Filed: October 25, 2001
    Date of Patent: July 22, 2003
    Assignee: Texas Instruments Incorporated
    Inventors: Amitava Chatterjee, Sreedhar Natarajan
  • Publication number: 20020105825
    Abstract: Quiescent current drawn by an array of four-transistor loadless static random access memory (SRAM) cells is minimized by using a negative feedback loop to set a reference voltage, for the wordline driver, to a level which reduces the subthreshold current through the pass transistors to a level which is just barely sufficient to reliably retain data.
    Type: Application
    Filed: December 31, 2001
    Publication date: August 8, 2002
    Applicant: Texas Instruments Incorporated
    Inventors: Andrew Marshall, Theodore W. Houston, Sreedhar Natarajan
  • Publication number: 20020083399
    Abstract: A method (40) of designing a circuit comprising a plurality of transistors (10, 46T, 60T). Each transistor of the plurality of transistors comprises an active region, a gate (G1, G2), a first source/drain (S/D1, S/D3) in the active region, a second source/drain in the active region, and at least one contact in each of the first source/drain and the second source/drain. The method comprises various steps. The method specifies a first set of distances for each transistor in a first set (10) of transistors in the plurality of transistors, wherein the first set of distances comprises a gate length (Lg), a gate width (Wg), and a distance representative of one or both of a first contact-to-edge distance (CTE1) and a first contact-to-gate distance (CTG1).
    Type: Application
    Filed: October 25, 2001
    Publication date: June 27, 2002
    Inventors: Amitava Chatterjee, Sreedhar Natarajan