Patents by Inventor Mahbub Hasan
Mahbub Hasan 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: 11906555Abstract: Methods and systems for emulating high side current of a power switch including low and high side switches. The method includes generating, with a low side current sensor, a low side current signal for the low side switch when the power switch is in a low state. The method also includes generating, with a first transconductance amplifier, an emulated current signal based on an input voltage of the power switch. The method further includes generating, with a buffer, a fixed reference voltage by sampling the low side current signal when the power switch changes from the low state to a high state. The method also includes generating, with a capacitor, an emulated voltage based on the emulated current signal and the fixed reference voltage. The method further includes, generating, with a second transconductance amplifier, a high side current signal for the high side switch based on the emulated voltage.Type: GrantFiled: April 7, 2022Date of Patent: February 20, 2024Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLCInventors: Mahbub Hasan, Yue Hung Tang
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Publication number: 20230324441Abstract: Methods and systems for emulating high side current of a power switch including low and high side switches. The method includes generating, with a low side current sensor, a low side current signal for the low side switch when the power switch is in a low state. The method also includes generating, with a first transconductance amplifier, an emulated current signal based on an input voltage of the power switch. The method further includes generating, with a buffer, a fixed reference voltage by sampling the low side current signal when the power switch changes from the low state to a high state. The method also includes generating, with a capacitor, an emulated voltage based on the emulated current signal and the fixed reference voltage. The method further includes, generating, with a second transconductance amplifier, a high side current signal for the high side switch based on the emulated voltage.Type: ApplicationFiled: April 7, 2022Publication date: October 12, 2023Applicant: Semiconductor Components Industries, LLCInventors: Mahbub HASAN, Yue Hung TANG
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Patent number: 11593371Abstract: A relational database management system (RDBMS) accepts a workload comprised of one or more queries against a relational database. The RDBMS evolves a default cost profile into a plurality of cost profiles using fixed or dynamic evolution, wherein each of the cost profiles captures one or more cost parameters for the workload. The cost profiles are represented by a multi-dimensional matrix that has one or more dimensions, and each of the dimensions represents one of the cost parameters. The RDBMS dynamically determines which of the cost profiles is an optimal cost profile for the workload by mapping the cost profiles to the workload using a random walk scoring algorithm or a biased walk scoring algorithm that searches the multi-dimensional matrix to identify the optimal cost profile. The RDBMS selects and performs one or more query execution plans for the workload based on the optimal cost profile for the workload.Type: GrantFiled: August 18, 2020Date of Patent: February 28, 2023Assignee: Teradata US, Inc.Inventors: Wellington Marcos Cabrera Arevalo, Kassem Awada, Mahbub Hasan, Allen N. Diaz, Mohammed Al-Kateb, Awny Kayed Al-Omari
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Patent number: 11526505Abstract: A database system receives a request from a user. The request invokes a data set function (DSF) and uses a property to be provided by the DSF. The database system determines that a function descriptor is available for the DSF. The function descriptor is expressed as markup language instructions. The function descriptor defines the property of the DSF. The database system uses the function descriptor to define a property for the DSF.Type: GrantFiled: December 5, 2019Date of Patent: December 13, 2022Assignee: Teradata US, Inc.Inventors: B. Anantha Subramanian, Mohamed Yassin Eltabakh, Mahbub Hasan, Robert Matthew Wehrmeister, Awny Kayed Al-Omari, Sanjay Sukumaran Nair, Kashif Abdullah Siddiqui, Mohammed Yassin Al-Kateb
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Patent number: 11468102Abstract: A relational database management system (RDBMS) optimizes limit queries over analytical functions, wherein the limit queries include an output clause comprising a LIMIT, TOP and SAMPLE clause with an expression specifying a limit that is a number K or a percentage ? %. The optimizations of the limit queries include: (1) static compile-time optimizations, and (2) dynamic run-time optimizations, based on semantic properties of “granularity” and “input-to-output cardinality” for the analytical functions.Type: GrantFiled: September 28, 2020Date of Patent: October 11, 2022Assignee: Teradata US, Inc.Inventors: Mohamed Ahmed Yassin Eltabakh, Mahbub Hasan, Awny Kayed Al-Omari, Mohammed Al-Kateb
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Patent number: 11409745Abstract: Execution of a query invoking an analytical function (AF) is optimized. The query includes a join operation between an AF table and an AuxiliaryTable. A determination is made that the AF includes a plurality of AF properties. Query-level properties about the query are inferred. A determination is made to change an order of the join operation from the plurality of AF properties and query-level properties.Type: GrantFiled: December 5, 2019Date of Patent: August 9, 2022Assignee: Teradata US, Inc.Inventors: Christina Pavlopoulou, Mahbub Hasan, B. Anantha Subramanian, Mohammed Al-Kateb, Awny Kayed Al-Omari, Kashif Abdullah Siddiqui, Robert Matthew Wehrmeister, Mohamed Yassin Eltabakh
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Patent number: 11223272Abstract: A method includes driving a first transistor to conduct a first current into an inductor when conductive and driving a second transistor to conduct a second current into the inductor when conductive. A first sense current is generated in response to the first current and a copy of the second current. A second sense current is generated in response to the second current and a copy of the first current. The first sense current is adjusted in response to the copy of the second current when the first transistor is nonconductive. The second sense current is adjusted in response to the copy of the first current when the second transistor is nonconductive. On times of the first and second transistors are controlled in response to a sum of the first and second sense currents.Type: GrantFiled: May 19, 2020Date of Patent: January 11, 2022Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLCInventor: Mahbub Hasan
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Publication number: 20210382920Abstract: A relational database management system (RDBMS) optimizes limit queries over analytical functions, wherein the limit queries include an output clause comprising a LIMIT, TOP and SAMPLE clause with an expression specifying a limit that is a number K or a percentage ? %. The optimizations of the limit queries include: (1) static compile-time optimizations, and (2) dynamic run-time optimizations, based on semantic properties of “granularity” and “input-to-output cardinality” for the analytical functions.Type: ApplicationFiled: September 28, 2020Publication date: December 9, 2021Applicant: Teradata US, Inc.Inventors: Mohamed Ahmed Yassin Eltabakh, Mahbub Hasan, Awny Kayed Al-Omari, Mohammed Al-Kateb
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Publication number: 20210117422Abstract: A relational database management system (RDBMS) accepts a workload comprised of one or more queries against a relational database. The RDBMS evolves a default cost profile into a plurality of cost profiles using fixed or dynamic evolution, wherein each of the cost profiles captures one or more cost parameters for the workload. The cost profiles are represented by a multi-dimensional matrix that has one or more dimensions, and each of the dimensions represents one of the cost parameters. The RDBMS dynamically determines which of the cost profiles is an optimal cost profile for the workload by mapping the cost profiles to the workload using a random walk scoring algorithm or a biased walk scoring algorithm that searches the multi-dimensional matrix to identify the optimal cost profile. The RDBMS selects and performs one or more query execution plans for the workload based on the optimal cost profile for the workload.Type: ApplicationFiled: August 18, 2020Publication date: April 22, 2021Applicant: Teradata US, Inc.Inventors: Wellington Marcos Cabrera Arevalo, Kassem Awada, Mahbub Hasan, Allen N. Diaz, Mohammed AI-Kateb, Awny Kayed Al-Omari
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Publication number: 20210083567Abstract: A method includes driving a first transistor to conduct a first current into an inductor when conductive and driving a second transistor to conduct a second current into the inductor when conductive. A first sense current is generated in response to the first current and a copy of the second current. A second sense current is generated in response to the second current and a copy of the first current. The first sense current is adjusted in response to the copy of the second current when the first transistor is nonconductive. The second sense current is adjusted in response to the copy of the first current when the second transistor is nonconductive. On times of the first and second transistors are controlled in response to a sum of the first and second sense currents.Type: ApplicationFiled: May 19, 2020Publication date: March 18, 2021Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLCInventor: Mahbub HASAN
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Publication number: 20200183921Abstract: A database system receives a request from a user. The request invokes a data set function (DSF) and uses a property to be provided by the DSF. The database system determines that a function descriptor is available for the DSF. The function descriptor is expressed as markup language instructions. The function descriptor defines the property of the DSF. The database system uses the function descriptor to define a property for the DSF.Type: ApplicationFiled: December 5, 2019Publication date: June 11, 2020Applicant: Teradata US, IncInventors: B. Anantha Subramanian, Mohamed Yassin Eltabakh, Mahbub Hasan, Robert Matthew Wehrmeister, Awny Kayed Al-Omari, Sanjay Sukumaran Nair, Kashif Abdullah Siddiqui
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Publication number: 20200183935Abstract: Execution of a query invoking an analytical function (AF) is optimized. The query includes a join operation between an AF table and an AuxiliaryTable and includes determining that the AF includes a plurality of AF properties. Query-level properties about the query are inferred. It is determined to change an order of the join operation from the plurality of AF properties and query-level properties.Type: ApplicationFiled: December 5, 2019Publication date: June 11, 2020Applicant: Teradata US, IncInventors: Christina Pavlopoulou, Mahbub Hasan, B. Anantha Subramanian, Mohammed Al-Kateb, Awny Kayed Al-Omari, Kashif Abdullah Siddiqui, Robert Matthew Wehrmeister, Mohamed Yassin Eltabakh
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Patent number: 9035642Abstract: An integrated circuit includes an output terminal and a controller having a measurement input coupled to the output terminal, a first output adapted to couple to a current source to control a first current sourced into the output terminal, and a second output adapted to couple to a current sink to control a second current from the output terminal. The controller applies control signals to the first output and the second output to selectively enable the current source and disable the current sink during a first phase of a load detection period and to disable the current source and enable the current sink during a second phase of the load detection period. The controller detects the load coupled to the output terminal if a voltage at the measurement terminal during the first phase is substantially equal to a voltage at the measurement terminal during the second phase.Type: GrantFiled: June 30, 2011Date of Patent: May 19, 2015Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLCInventor: Mahbub Hasan
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Publication number: 20130002233Abstract: An integrated circuit includes an output terminal and a controller having a measurement input coupled to the output terminal, a first output adapted to couple to a current source to control a first current sourced into the output terminal, and a second output adapted to couple to a current sink to control a second current from the output terminal. The controller applies control signals to the first output and the second output to selectively enable the current source and disable the current sink during a first phase of a load detection period and to disable the current source and enable the current sink during a second phase of the load detection period. The controller detects the load coupled to the output terminal if a voltage at the measurement terminal during the first phase is substantially equal to a voltage at the measurement terminal during the second phase.Type: ApplicationFiled: June 30, 2011Publication date: January 3, 2013Inventor: Mahbub Hasan
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Patent number: 7944299Abstract: A method and circuit for changing a threshold voltage of a transistor. The circuit includes a sense circuit coupled to a switching transistor, a circuit transistor and to one terminal of a resistor. The other terminal of the resistor is connected to a body contact. The switching transistor directs current along one of two different paths in response to an input voltage sensed by the sense circuit. When the switching transistor directs a first current along one path, the first current is steered towards the resistor and flows through the resistor in one direction and when the switching transistor directs a second current along the other path, the second current is directed towards the resistor and flows through the resistor in the opposite direction from the first current. Steering the currents varies the potential of a body with respect to the potential at the source of the circuit transistor.Type: GrantFiled: March 25, 2010Date of Patent: May 17, 2011Assignee: Semiconductor Components Industries, L.L.C.Inventors: Aravind Mangudi, Eric David Joseph, Mahbub Hasan
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Publication number: 20100176883Abstract: A method and circuit for changing a threshold voltage of a transistor. The circuit includes a sense circuit coupled to a switching transistor, a circuit transistor and to one terminal of a resistor. The other terminal of the resistor is connected to a body contact. The switching transistor directs current along one of two different paths in response to an input voltage sensed by the sense circuit. When the switching transistor directs a first current along one path, the first current is steered towards the resistor and flows through the resistor in one direction and when the switching transistor directs a second current along the other path, the second current is directed towards the resistor and flows through the resistor in the opposite direction from the first current. Steering the currents varies the potential of a body with respect to the potential at the source of the circuit transistor.Type: ApplicationFiled: March 25, 2010Publication date: July 15, 2010Inventors: Aravind Mangudi, Eric David Joseph, Mahbub Hasan
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Patent number: 7714652Abstract: A method and circuit for changing a threshold voltage of a transistor. The circuit includes a sense circuit coupled to a switching transistor, a circuit transistor and to one terminal of a resistor. The other terminal of the resistor is connected to a body contact. The switching transistor directs current along one of two different paths in response to an input voltage sensed by the sense circuit. When the switching transistor directs a first current along one path, the first current is steered towards the resistor and flows through the resistor in one direction and when the switching transistor directs a second current along the other path, the second current is directed towards the resistor and flows through the resistor in the opposite direction from the first current. Steering the currents varies the potential of a body with respect to the potential at the source of the circuit transistor.Type: GrantFiled: April 7, 2008Date of Patent: May 11, 2010Assignee: Semiconductor Components Industries, LLCInventors: Aravind Mangudi, Eric David Joseph, Mahbub Hasan
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Publication number: 20090251213Abstract: A method and circuit for changing a threshold voltage of a transistor. The circuit includes a sense circuit coupled to a switching transistor, a circuit transistor and to one terminal of a resistor. The other terminal of the resistor is connected to a body contact. The switching transistor directs current along one of two different paths in response to an input voltage sensed by the sense circuit. When the switching transistor directs a first current along one path, the first current is steered towards the resistor and flows through the resistor in one direction and when the switching transistor directs a second current along the other path, the second current is directed towards the resistor and flows through the resistor in the opposite direction from the first current. Steering the currents varies the potential of a body with respect to the potential at the source of the circuit transistor.Type: ApplicationFiled: April 7, 2008Publication date: October 8, 2009Inventors: Aravind Mangudi, Eric David Joseph, Mahbub Hasan