Patents by Inventor Sumanth Gururajarao
Sumanth Gururajarao 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).
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Patent number: 7773431Abstract: One embodiment of the present invention includes a column multiplexer for accessing data from a memory array comprising an output node having a logic state that is based on a logic state of a control node, and column elements, each comprising a first pair of series connected switches controlled by a column select signal and a bit line signal associated with data stored in a plurality of memory cells. The first pair of switches is configured to set the control node to a logic low state based on a logic state of the bit line signal. The column elements each also comprise a second pair of series connected switches controlled by the bit line signal and a complement of the column select signal. The second pair of switches is configured to set the control node to a logic high state based on the logic state of the bit line signal.Type: GrantFiled: December 18, 2008Date of Patent: August 10, 2010Assignee: Texas Instruments IncorporatedInventors: Radu Avramescu, Sumanth Gururajarao, Hugh Thomas Mair
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Patent number: 7564077Abstract: An integrated circuit. The integrated circuit comprises an area having a layout aligned in rows. Each row is definable by a pair of row boundaries. The integrated circuit also comprises a plurality of cells, comprising a first set of cells. Each cell in the first set of cells spans at least two rows and comprises a PMOS transistor having a source/drain region that spans across one of the row boundaries and an NMOS transistor having a source/drain region that spans across one of the row boundaries.Type: GrantFiled: May 7, 2007Date of Patent: July 21, 2009Assignee: Texas Instruments IncorporatedInventors: Uming Ko, Dharin Shah, Senthil Sundaramoorthy, Girishankar Gurumurthy, Sumanth Gururajarao, Rolf Lagerquist, Clive Bittlestone
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Publication number: 20090097327Abstract: One embodiment of the present invention includes a column multiplexer for accessing data from a memory array comprising an output node having a logic state that is based on a logic state of a control node, and column elements, each comprising a first pair of series connected switches controlled by a column select signal and a bit line signal associated with data stored in a plurality of memory cells. The first pair of switches is configured to set the control node to a logic low state based on a logic state of the bit line signal. The column elements each also comprise a second pair of series connected switches controlled by the bit line signal and a complement of the column select signal. The second pair of switches is configured to set the control node to a logic high state based on the logic state of the bit line signal.Type: ApplicationFiled: December 18, 2008Publication date: April 16, 2009Inventors: Radu Avramescu, Sumanth Gururajarao, Hugh Thomas Mair
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Publication number: 20090046519Abstract: A computer-implemented method of configuring a static random access memory (SRAM) bit cell for operation, an adaptive biasing device and semiconductor wafer testing system. In one embodiment, the method includes: (1) determining a performance characteristic of the SRAM bit cell on a wafer, (2) comparing the performance characteristic to a target and (3) configuring biasing circuitry associated with the SRAM bit cell based on the comparing.Type: ApplicationFiled: August 15, 2007Publication date: February 19, 2009Applicant: Texas Instruments IncorporatedInventors: Alice Wang, David Scott, Sumanth Gururajarao, Gordon Gammie, Sudha Thiruvengadam
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Patent number: 7477551Abstract: One embodiment of the present invention includes a column multiplexer for accessing data from a memory array comprising an output node having a logic state that is based on a logic state of a control node, and column elements, each comprising a first pair of series connected switches controlled by a column select signal and a bit line signal associated with data stored in a plurality of memory cells. The first pair of switches is configured to set the control node to a logic low state based on a logic state of the bit line signal. The column elements each also comprise a second pair of series connected switches controlled by the bit line signal and a complement of the column select signal. The second pair of switches is configured to set the control node to a logic high state based on the logic state of the bit line signal.Type: GrantFiled: November 8, 2006Date of Patent: January 13, 2009Assignee: Texas Instruments IncorporatedInventors: Radu Avramescu, Sumanth Gururajarao, Hugh Thomas Mair
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Publication number: 20080123449Abstract: One embodiment of the present invention includes a column multiplexer for accessing data from a memory array comprising an output node having a logic state that is based on a logic state of a control node, and column elements, each comprising a first pair of series connected switches controlled by a column select signal and a bit line signal associated with data stored in a plurality of memory cells. The first pair of switches is configured to set the control node to a logic low state based on a logic state of the bit line signal. The column elements each also comprise a second pair of series connected switches controlled by the bit line signal and a complement of the column select signal. The second pair of switches is configured to set the control node to a logic high state based on the logic state of the bit line signal.Type: ApplicationFiled: November 8, 2006Publication date: May 29, 2008Inventors: Radu Avramescu, Sumanth Gururajarao, Hugh Thomas Mair
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Patent number: 7327185Abstract: An electronic system comprises a plurality of circuit paths. Each path in the plurality of circuit paths is coupled to receive a system voltage from a voltage supply. The system further comprises a first circuit for providing a first value indicating a first potential capability of operational speed of at least one path in the plurality of circuit paths and a second circuit for providing a second value for indicating a second potential capability of operational speed of the at least one path in the plurality of circuit paths. The system further comprises circuitry for adjusting the system voltage, as provided by the voltage supply, in response to a relation between the first value and the second value.Type: GrantFiled: November 1, 2005Date of Patent: February 5, 2008Assignee: Texas Instruments IncorporatedInventors: Hugh Mair, Sumanth Gururajarao
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Publication number: 20070290270Abstract: An integrated circuit. The integrated circuit comprises an area having a layout aligned in rows. Each row is definable by a pair of row boundaries. The integrated circuit also comprises a plurality of cells, comprising a first set of cells. Each cell in the first set of cells spans at least two rows and comprises a PMOS transistor having a source/drain region that spans across one of the row boundaries and an NMOS transistor having a source/drain region that spans across one of the row boundaries.Type: ApplicationFiled: May 7, 2007Publication date: December 20, 2007Inventors: Uming Ko, Dharin Shah, Senthil Sundaramoorthy, Girishankar Gurumurthy, Sumanth Gururajarao, Rolf Lagerquist, Clive Bittlestone
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Publication number: 20060267654Abstract: In a method and system for data retention, a data input is latched by a first latch. A second latch coupled to the first latch receives the data input for retention while the first latch is inoperative in a standby power mode. The first latch receives power from a first power line that is switched off during the standby power mode. The second latch receives power from a second power line. A controller receives a clock input and a retention signal and provides a clock output to the first latch and the second latch. A change in the retention signal is indicative of a transition to the standby power mode. The controller continues to hold the clock output at a predefined voltage level and the second latch continues to receive power from the second power line in the standby power mode, thereby retaining the data input.Type: ApplicationFiled: May 26, 2005Publication date: November 30, 2006Applicant: Texas Instruments IncorporatedInventors: Sumanth Gururajarao, Hugh Mair, David Scott, Uming Ko
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Patent number: 7091766Abstract: State retention registers for use in low-power standby modes of digital IC operation are provided, wherein: a differential circuit (M1?M3; M1?M4) is used to load the shadow latch from the normal functional latch; the signal (REST, RESTZ) used to restore data from the shadow latch to the normal functional latch is a “don't care” signal while the shadow latch is retaining the data during low-power standby mode; retained data from the shadow latch is restored to the normal functional latch via a transistor gate connected to a node (N10) of the shadow latch where the retained data is provided; a power supply (VDD) other than the shadow latch's power supply (VRETAIN) powers the data restore operation; and the normal functional latch is operable independently of the operational states of the high Vt transistors (M1, M2, M5 and M6; M3, M4, M5 and M6) used to implement the state retention functionality.Type: GrantFiled: July 3, 2003Date of Patent: August 15, 2006Assignee: Texas Instruments IncorporatedInventors: Uming Ko, David B. Scott, Sumanth Gururajarao, Hugh Mair
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Publication number: 20060123074Abstract: determining piece-wise polynomials which together would represent large data sets having multi-dimensional input vectors and corresponding output element. In an embodiment, a function/procedure/routine is recursively called/invoked to determine piece-wise polynomial is a data set cannot be entirely modeled by one polynomial. Another aspect of the present invention reduces the number of combinations (of orders for sub-polynomials forming the polynomials) to be tried in determining polynomials, meeting various accuracy requirements. Such a reduction is obtained based on a recognition that when the order in one dimension alone is increased and the result does not lead to acceptable accuracy of the polynomial, the combinations with a lesser number for the order (of the dimension) can be ruled out.Type: ApplicationFiled: December 7, 2004Publication date: June 8, 2006Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Girishankar GURUMURTHY, Shitanshu TIWARI, Hugh MAIR, Sumanth GURURAJARAO
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Publication number: 20060091385Abstract: An electronic system. The system comprises a plurality of circuit paths. Each path in the plurality of circuit paths is coupled to receive a system voltage from a voltage supply. The system further comprises a first circuit for providing a first value indicating a potential capability of operational speed of at least one path in the plurality of paths and a second circuit for providing a second value for indicating a potential capability of operational speed of the at least one path in the plurality of paths. The system further comprises circuitry for adjusting the system voltage, as provided by the voltage supply, in response to a relation between the first value and the second value.Type: ApplicationFiled: November 1, 2005Publication date: May 4, 2006Applicant: Texas Instruments IncorporatedInventors: Hugh Mair, Sumanth Gururajarao
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Patent number: 6989702Abstract: State retention registers for use in low-power standby modes of digital IC operation are provided, wherein: a differential circuit (M1–M3; M1–M4) is used to load the shadow latch from the normal functional latch; the signal (REST, RESTZ) used to restore data from the shadow latch to the normal functional latch is a “don't care” signal while the shadow latch is retaining the data during low-power standby mode; retained data from the shadow latch is restored to the normal functional latch via a transistor gate connected to anode (N10) of the shadow latch where the retained data is provided; a power supply (VDD) other than the shadow latch's power supply (VRETAIN) powers the data restore operation; and the normal functional latch is operable independently of the operational states of the high Vt transistors (M1, M2, M5 and M6; M3, M4, M5 and M6) used to implement the state retention functionality.Type: GrantFiled: July 3, 2003Date of Patent: January 24, 2006Assignee: Texas Instruments IncorporatedInventors: Uming Ko, David B. Scott, Sumanth Gururajarao, Hugh T. Mair, Peter H. Cumming, Franck Dahan
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Publication number: 20040051574Abstract: State retention registers for use in low-power standby modes of digital IC operation are provided, wherein: a differential circuit (M1-M3; M1-M4) is used to load the shadow latch from the normal functional latch; the signal (REST, RESTZ) used to restore data from the shadow latch to the normal functional latch is a “don't care” signal while the shadow latch is retaining the data during low-power standby mode; retained data from the shadow latch is restored to the normal functional latch via a transistor gate connected to anode (N10) of the shadow latch where the retained data is provided; a power supply (VDD) other than the shadow latch's power supply (VRETAIN) powers the data restore operation; and the normal functional latch is operable independently of the operational states of the high Vt transistors (M1, M2, M5 and M6; M3, M4, M5 and M6) used to implement the state retention functionality.Type: ApplicationFiled: July 3, 2003Publication date: March 18, 2004Inventors: Uming Ko, David B. Scott, Sumanth Gururajarao, Hugh T. Mair, Peter H. Cumming, Franck Dahan
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Publication number: 20040008071Abstract: State retention registers for use in low-power standby modes of digital IC operation are provided, wherein: a differential circuit (M1−M3; M1−M4) is used to load the shadow latch from the normal functional latch; the signal (REST, RESTZ) used to restore data from the shadow latch to the normal functional latch is a “don't care” signal while the shadow latch is retaining the data during low-power standby mode; retained data from the shadow latch is restored to the normal functional latch via a transistor gate connected to a node (N10) of the shadow latch where the retained data is provided; a power supply (VDD) other than the shadow latch's power supply (VRETAIN) powers the data restore operation; and the normal functional latch is operable independently of the operational states of the high Vt transistors (M1, M2, M5 and M6; M3, M4, M5 and M6) used to implement the state retention functionality.Type: ApplicationFiled: July 3, 2003Publication date: January 15, 2004Inventors: Uming Ko, David B. Scott, Sumanth Gururajarao, Hugh T Mair