Patents by Inventor Sumant Ranganathan
Sumant Ranganathan 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: 8449393Abstract: A game controller with a communications interface, at least one touch sensitive pad having a plurality of touch sensitive elements, and processing circuitry coupled to the communications interface and the at least one touch sensitive pad. The processing circuitry enacts touch pad configuration settings that correlate subsets of the plurality of touch sensitive elements to respective distinct user input locations. The processing circuitry receives touch pad input from the at least one touch sensitive pad. The touch pad input corresponds to a user's touch of at least some of the plurality of touch sensitive elements. The processing circuitry processes the touch pad input to determine user input directions based upon the touch pad configuration settings, and then transmits the touch pad input directions to a game console via the communications interface for use as gaming input.Type: GrantFiled: October 26, 2010Date of Patent: May 28, 2013Assignee: Broadcom CorporationInventors: David A. Sobel, Monika Gupta, Sumant Ranganathan, Pieter Vorenkamp, Jeyhan Karaoguz
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Publication number: 20130109441Abstract: Embodiments provide systems and methods for aligning the supply voltage signal applied to a power amplifier (PA) with the radio frequency (RF) output signal of the PA in a wireless device. The RF output signal is generated by applying a transmit signal to a transmit path of the wireless device. The supply voltage is generated by applying an envelope tracking (ET) signal, based on the transmit signal, to an envelope tracking (ET) path of the wireless device. Embodiments operate by estimating the delays of the ET path and the transmit path, and then controlling a relative delay between the transmit signal and the ET signal accordingly. In an embodiment, estimation of the delays of the ET path and the transmit path is done by correlating respective signals of each path.Type: ApplicationFiled: June 7, 2012Publication date: May 2, 2013Inventors: Robert Lorenz, Sumant Ranganathan, Xinyu Yu, Sriraman Dakshinamurthy
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Publication number: 20120329533Abstract: A system for operating a portable communication device includes a module to operate the portable communication device in a first mode. The system may provide telephony service to a user at a first performance level. The system may determine to operate the portable communication device in a power-save mode that is different from the first mode. The system may operate the portable communication device in the power-save mode and provide telephony service to the user at a second performance level different from the first performance level.Type: ApplicationFiled: September 7, 2012Publication date: December 27, 2012Applicant: Broadcom CorporationInventors: Chun-ying Chen, Pieter Vorenkamp, Neil Y. Kim, Sumant Ranganathan
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Publication number: 20120299868Abstract: A mutual capacitive touch panel providing improved noise immunity and improved spatial resolution is described. The touch panel includes a drive line having a plurality of drive electrodes. The touch panel further includes a sense line arranged at an angle with respect to the drive line and the sense line having a plurality of sense electrodes, such that each of the plurality of sense electrodes overlies one of the plurality of drive electrodes. The touch panel is further configured such that a perimeter of each of the plurality of drive electrodes encompasses a perimeter of at least one of the plurality of sense electrodes.Type: ApplicationFiled: December 20, 2011Publication date: November 29, 2012Applicant: BROADCOM CORPORATIONInventors: Milind Bhagavat, David Sobel, John Walley, Sumant Ranganathan
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Patent number: 8286013Abstract: A system and method for providing multi-tiered power save operation in a portable communication device. A portable communication device may be operated in a first power-save mode. A power-save module of the portable communication device may, for example, provide for operation in such a first power-save mode. It may be determined to operate the portable communication device in a second power-save mode that is different than the first power-save mode. A power-save management module may, for example, make such a determination. The portable communication device may then be operated in the second power-save mode. The power-save module may, for example, provide for operation in such a second power-save mode.Type: GrantFiled: June 24, 2005Date of Patent: October 9, 2012Assignee: Broadcom CorporationInventors: Chun-ying Chen, Pieter Vorenkamp, Neil Y. Kim, Sumant Ranganathan
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Patent number: 8250499Abstract: A system and method for storing power utilization information in an integrated circuit and utilizing such information. Various aspects of the present invention provide an integrated circuit that comprises a first module, which stores power utilization information for at least a portion of the integrated circuit. A second module of the integrated circuit may communicate the power utilization information with an electrical device external to the integrated circuit. Various aspects of the present invention provide a method for storing power utilization information in an integrated circuit. For example, a performance characteristic and/or a power supply characteristic may be monitored as the integrated circuit is utilized. Power utilization information may be determined from the monitored characteristic(s), and the power utilization information may be stored in the integrated circuit.Type: GrantFiled: April 11, 2011Date of Patent: August 21, 2012Assignee: Broadcom CorporationInventors: Chun-ying Chen, Pieter Vorenkamp, Neil Y. Kim, Sumant Ranganathan
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Patent number: 8208462Abstract: A second output transmission signal (“TX2”) added to a line driver is a scaled version of the main output transmission signal (“TX1”). TX2 is scaled from TX1 by a variable scale factor K. An adaptive hybrid circuit subtracts TX1 and TX2 from a line signal carrying both a line transmission signal and a line received signal (“RX”). A programmable impedance Ztune is coupled between the TX2 output of the line driver and the RX output of the adaptive hybrid circuit. A transmission echo in the output RX signal is measured. K and Ztune are then adaptively tuned to minimize the transmission echo. The hybrid in this case becomes a 4-port network, one port specifically added to adaptively cancel the transmission echo in the RX output of the adaptive hybrid circuit. Alternatively, the hybrid may be a 3-port hybrid including variable impedances to cancel the line transmission signal.Type: GrantFiled: July 2, 2009Date of Patent: June 26, 2012Assignee: Broadcom CorporationInventors: Tom Kwan, Sumant Ranganathan
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Patent number: 8181045Abstract: A circuit and method utilizing a power control data bus for implementing power control. Various aspects of the present invention provide an electrical circuit that comprises a power supply circuit that outputs electrical power. The electrical circuit may also comprise an integrated circuit that receives electrical power from the power supply circuit. The electrical circuit may also comprise a power control data bus, which communicatively couples a power control data bus interface of the power supply circuit and a power control data bus interface of the integrated circuit. The power control data bus may, for example, carry power control data between the integrated circuit and the power supply circuit. Various aspects of the present invention also provide a method that comprises communicating power control data over a power control data bus and utilizing the power control data to control characteristics of electrical power provided to an integrated circuit or module.Type: GrantFiled: March 15, 2010Date of Patent: May 15, 2012Assignee: Broadcom CorporationInventors: Neil Y. Kim, Pieter Vorenkamp, Sumant Ranganathan, Chun-ying Chen
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Patent number: 8145921Abstract: A system and method for implementing a common control bus in a multi-regulator power supply integrated circuit. The integrated circuit may, for example, comprise first and second power regulator modules that control at least one characteristic of respective power signals. The integrated circuit may also, for example, comprise a communication interface module that receives power control information related to operation of the first and second power regulator modules over a shared data bus. An exemplary method may, for example, comprise receiving power control information over a data bus. The method may also, for example, comprise determining which of a plurality of power regulators corresponds to the received power control information. The method may further, for example, comprise determining a regulator control signal, based at least in part on the received power control information, and provide the regulator control signal to the determined regulator(s) to control operation of the determined regulator(s).Type: GrantFiled: March 10, 2009Date of Patent: March 27, 2012Assignee: Broadcom CorporationInventors: Chun-ying Chen, Pieter Vorenkamp, Neil Y. Kim, Sumant Ranganathan
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Patent number: 8072096Abstract: An integrated circuit comprising multiple independent power supply zones at substantially the same voltage level and a method for utilizing such power supply zones. An integrated circuit may comprise a first module and may, for example, comprise a second module. A first power supply bus may communicate first electrical power to the first module, where the first electrical power is characterized by a first set of power characteristics comprising a first voltage level. A second power supply bus may communicate second power to the second module, where the second power is characterized by a second set of power characteristics comprising a second voltage level that is substantially similar to the first voltage level. The second set of power characteristics may, for example, be substantially different than the first set of power characteristics. The second power supply bus may also, for example, communicate the second electrical power to the first module.Type: GrantFiled: July 2, 2010Date of Patent: December 6, 2011Inventors: Sumant Ranganathan, Pieter Vorenkamp, Neil Y. Kim, Chun-ying Chen
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Patent number: 8018361Abstract: The present invention relates generally to analog-to-digital converters (ADCs). Embodiments of the present invention provide novel ADC architectures directed at reducing the overall ADC area and power consumption. Embodiments of the present invention may be used in pipelined ADCs, cyclic ADCs, and successive approximation (SAR) ADCs, for example. Further, embodiments of the present invention may be implemented using both single-ended and differential configurations.Type: GrantFiled: November 10, 2009Date of Patent: September 13, 2011Assignee: Broadcom CorporationInventors: Sumant Ranganathan, Tom Kwan, Xinyu Yu
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Patent number: 8000083Abstract: The present invention provides several scalable integrated circuit high density capacitors and their layout techniques. The capacitors are scaled, for example, by varying the number of metal layers and/or the area of the metal layers used to form the capacitors. The capacitors use different metallization patterns to form the metal layers, and different via patterns to couple adjacent metal layers. In embodiments, optional shields are included as the top-most and/or bottom-most layers of the capacitors, and/or as side shields, to reduce unwanted parasitic capacitance.Type: GrantFiled: July 29, 2009Date of Patent: August 16, 2011Assignee: Broadcom CorporationInventors: Victor Chiu-Kit Fong, Eric Bruce Blecker, Tom W. Kwan, Ning Li, Sumant Ranganathan, Chao Tang, Pieter Vorenkamp
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Publication number: 20110193809Abstract: Provided are systems and methods for providing enhanced touch sensing. One system providing enhanced touch sensing includes a multi-mode touch screen and a processor configured to apply at least one test signal to a sense element of the multi-mode touch screen, detect at least one return signal from the sense element, and then determine a relative position of an object corresponding to the at least one return signal, the multi-mode touch screen being capable of sensing the first object using first and second detection modes. One multi-mode touch screen comprises a multi-mode multi-touch touch screen. One processor is configured to apply an adaptive test signal to a sense element of a touch screen.Type: ApplicationFiled: February 3, 2011Publication date: August 11, 2011Applicant: BROADCOM CORPORATIONInventors: John Walley, Robert Lukas, David Sobel, Sumant Ranganathan, Tianhao Li
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Patent number: 7995679Abstract: Provided are a method and system for digitizing a sensor model output signal. The system includes a filter, a demodulator coupled to the filter, a DC offset cancellation mechanism coupled to the demodulator, and an analog to digital converter (ADC). The ADC is directly coupled to the demodulator and the DC offset cancellation mechanism.Type: GrantFiled: April 27, 2005Date of Patent: August 9, 2011Assignee: Broadcom CorporationInventors: Sumant Ranganathan, Tom W. Kwan, Hung-Sung Li
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Publication number: 20110187316Abstract: A system and method for implementing a multi-voltage multi-battery power management integrated circuit. Various aspects of the present invention provide a power management integrated circuit. The power management IC may comprise a first regulator module that receives a first battery power signal from a first battery characterized by a first battery voltage and outputs a first regulated power signal, based at least in part on the first battery power signal. The power management IC may also comprise a second regulator module that receives a second battery power signal from a second battery characterized by a second battery voltage and outputs a second regulated power signal, based at least in part on the second battery power signal. The second battery voltage may, for example, be substantially different than the first battery voltage. The power first and second regulated power signals may, for example, correspond to substantially different power supply voltages.Type: ApplicationFiled: April 11, 2011Publication date: August 4, 2011Applicant: BROADCOM CORPORATIONInventors: Sumant Ranganathan, Pieter Vorenkamp, Neil Y. Kim, Chun-Ying Chen
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Publication number: 20110191736Abstract: A system and method for storing power utilization information in an integrated circuit and utilizing such information. Various aspects of the present invention provide an integrated circuit that comprises a first module, which stores power utilization information for at least a portion of the integrated circuit. A second module of the integrated circuit may communicate the power utilization information with an electrical device external to the integrated circuit. Various aspects of the present invention provide a method for storing power utilization information in an integrated circuit. For example, a performance characteristic and/or a power supply characteristic may be monitored as the integrated circuit is utilized. Power utilization information may be determined from the monitored characteristic(s), and the power utilization information may be stored in the integrated circuit.Type: ApplicationFiled: April 11, 2011Publication date: August 4, 2011Applicant: BROADCOM CORPORATIONInventors: Chun-ying Chen, Pieter Vorenkamp, Neil Y. Kim, Sumant Ranganathan
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Patent number: 7978456Abstract: The present invention provides several scalable integrated circuit high density capacitors and their layout techniques. The capacitors are scaled, for example, by varying the number of metal layers and/or the area of the metal layers used to from the capacitors. The capacitors use different metallization patterns to form the metal layers, and different via patterns to couple adjacent metal layers. In embodiments, optional shields are included as the top-most and/or bottom-most layers of the capacitors, and/or as side shields, to reduce unwanted parasitic capacitance.Type: GrantFiled: July 29, 2009Date of Patent: July 12, 2011Assignee: Broadcom CorporationInventors: Victor Chiu-Kit Fong, Eric Bruce Blecker, Tom W. Kwan, Ning Li, Sumant Ranganathan, Chao Tang, Pieter Vorenkamp
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Patent number: 7953459Abstract: A system and method for providing a low power warning in a portable communication device based on predicted device utilization. Various aspects of the present invention may comprise monitoring power utilization for a portable communication device. A power utilization profile may be determined based, at least in part, on the results of the power utilization monitoring. Power availability for the portable communication device may be determined. Future power need for the portable communication device may be predicted based, at least in part, on the determined power utilization profile. The predicted future power need and the determined power availability may be analyzed to determine whether to generate a warning indicating a potential future power shortage. If it is determined that a potential future power shortage warning should be generated, such a warning may be generated. Such a warning may, for example, be generated in accordance with user specifications.Type: GrantFiled: June 15, 2009Date of Patent: May 31, 2011Assignee: Broadcom CorporationInventors: Neil Y. Kim, Pieter Vorenkamp, Sumant Ranganathan, Chun-Ying Chen
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Publication number: 20110118024Abstract: Operating a game controller by setting initial operational parameters of at least one touch sensitive pad of the game controller. The touch sensitive pad has a plurality of touch sensitive elements. Touch pad input is received from the at least one touch sensitive pad of the game controller. The touch pad input corresponds to a user's touch of at least some of the plurality of touch sensitive elements. The touch pad input is at least partially processed by processing circuitry of the game controller and transmitted to a game console via a communications interface of the game controller for processing. Upon meeting an operational parameter alteration condition, the operational parameters of the at least one touch sensitive pad of the game controller are altered.Type: ApplicationFiled: October 26, 2010Publication date: May 19, 2011Applicant: BROADCOM CORPORATIONInventors: BOB LUKAS, DAVID A. SOBEL, SUMANT RANGANATHAN, JOHN WALLEY, PIETER VORENKAMP
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Publication number: 20110118025Abstract: A game controller with a communications interface, at least one touch sensitive pad having a plurality of touch sensitive elements, and processing circuitry coupled to the communications interface and the at least one touch sensitive pad. The processing circuitry receives touch pad input via the plurality of touch sensitive elements of the at least one touch sensitive pad. The processing circuitry then transmits the touch pad input to a game console via the communications interface. The touch sensitive pad can have a plurality of separate and distinct touch sensitive pads, allowing the processing circuitry to receive touch pad input via each of the plurality of separate and distinct touch sensitive pads. Touch pad input could include user finger and/or user thumb touch pad input.Type: ApplicationFiled: October 26, 2010Publication date: May 19, 2011Applicant: BROADCOM CORPORATIONInventors: ROBERT M. LUKAS, DAVID A. SOBEL, MONIKA GUPTA, QIANG FU, SUMANT RANGANATHAN, TOM W. KWAN, XINYU YU