Patents by Inventor Sridhar Kotikalapoodi
Sridhar Kotikalapoodi 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: 10270345Abstract: An efficient power supply with fast, wideband response has been disclosed. In one implementation, two switching regulators with different frequency responses are combined to provide wideband, efficient power.Type: GrantFiled: July 23, 2017Date of Patent: April 23, 2019Inventor: Sridhar Kotikalapoodi
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Patent number: 10084384Abstract: Method and Apparatus for a switch mode power supply are disclosed. The switch mode power supply is efficient and generates a very small inductor current ripple and output voltage ripple. The switch mode power supply has a wider bandwidth and the filter components including magnetic storage element and the output capacitor can be made extremely smaller.Type: GrantFiled: April 22, 2015Date of Patent: September 25, 2018Inventor: Sridhar Kotikalapoodi
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Patent number: 9748845Abstract: An efficient power supply with fast, wideband response has been disclosed. In one implementation, two switching regulators with different frequency responses are combined to provide wideband, efficient power.Type: GrantFiled: November 2, 2013Date of Patent: August 29, 2017Inventor: Sridhar Kotikalapoodi
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Patent number: 9257905Abstract: An efficient power supply with fast transient response has been disclosed. In one implementation, two loops with different frequency responses are combined to provide an efficient, fast responding power supply.Type: GrantFiled: November 2, 2013Date of Patent: February 9, 2016Inventor: Sridhar Kotikalapoodi
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Patent number: 9256238Abstract: A method and apparatus for fast, efficient, low noise power supply have been disclosed. In one implementation a switching power supply and a linear regulator provide efficiency and rapid response.Type: GrantFiled: May 10, 2013Date of Patent: February 9, 2016Inventor: Sridhar Kotikalapoodi
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Patent number: 9250694Abstract: A method and apparatus for fast, efficient, low noise power supply have been disclosed. In one implementation a switching power supply and a linear regulator provide efficiency and rapid response.Type: GrantFiled: May 10, 2013Date of Patent: February 2, 2016Inventor: Sridhar Kotikalapoodi
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Patent number: 9153999Abstract: Embodiments of the present invention include circuits and methods for sensing resistance. In one embodiment the present invention includes a method comprising detecting a voltage at an input of a regulator received from a power adapter, determining a maximum current capability of the power adapter, and charging a battery coupled to an output of the regulator using said detected voltage and said maximum current as inputs to said regulator. In one embodiment, the detected voltage is used to configure a voltage used to determine if or when a voltage received from a power adapter drops below some threshold.Type: GrantFiled: October 24, 2011Date of Patent: October 6, 2015Assignee: QUALCOMM, IncorporatedInventors: Shadi Hawawini, M. Abid Hussain, Georgios K. Paparrizos, Sridhar Kotikalapoodi
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Patent number: 8436936Abstract: Embodiments of the present invention include circuits and methods for calibrating position displacement in a voltage controlled actuator. In one embodiment, a calibration circuit comprises an actuator having a control terminal for receiving a programmable control voltage to set a displacement, a switch that selectively decouples said programmable voltage from said control terminal and couples a reference current to said control terminal when the control terminal is decoupled from said control voltage, a comparator that senses a voltage difference between said control voltage and said control terminal, and a timer coupled to an output of the comparator. The timer measures a time period required to increase the control terminal voltage. The capacitance of the actuator may be determined and used to calibrate the position of the actuator.Type: GrantFiled: July 12, 2012Date of Patent: May 7, 2013Assignee: Qualcomm IncorporatedInventors: Sang Ton Ngo, Thomas O'Brien, Sridhar Kotikalapoodi, M Abid Hussain
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Patent number: 8344791Abstract: Embodiments of the present invention include charge pump circuits and methods. In one embodiment, a first charge pump receives a voltage and generates a first charge pump output voltage and current for supplying the power requirements of a circuit. A second charge pump is coupled in series with the first charge pump. The second charge pump generates a second charge pump output voltage and current for supplying different power requirements of the circuit. In one embodiment, the first charge pump provides a high current low voltage output to a first circuit and the second charge pump provides a low current high voltage output to a second circuit. Capacitors of the first charge pump may be external to an integrated circuit and capacitors of the second charge pump may be internal to the integrated circuit.Type: GrantFiled: August 1, 2012Date of Patent: January 1, 2013Assignee: Qualcomm IncorporatedInventors: Kenneth C Adkins, Sang Ton Ngo, M Abid Hussain, Thomas O'Brien, Sridhar Kotikalapoodi, George A Hall
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Publication number: 20120293244Abstract: Embodiments of the present invention include charge pump circuits and methods. In one embodiment, a first charge pump receives a voltage and generates a first charge pump output voltage and current for supplying the power requirements of a circuit. A second charge pump is coupled in series with the first charge pump. The second charge pump generates a second charge pump output voltage and current for supplying different power requirements of the circuit. In one embodiment, the first charge pump provides a high current low voltage output to a first circuit and the second charge pump provides a low current high voltage output to a second circuit. Capacitors of the first charge pump may be external to an integrated circuit and capacitors of the second charge pump may be internal to the integrated circuit.Type: ApplicationFiled: August 1, 2012Publication date: November 22, 2012Applicant: SUMMIT MICROELECTRONICS, INC.Inventors: Kenneth C. Adkins, Sang Ton Ngo, M. Abid Hussain, Thomas O'Brien, Sridhar Kotikalapoodi, George A. Hall
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Publication number: 20120274787Abstract: Embodiments of the present invention include circuits and methods for calibrating position displacement in a voltage controlled actuator. In one embodiment, a calibration circuit comprises an actuator having a control terminal for receiving a programmable control voltage to set a displacement, a switch that selectively decouples said programmable voltage from said control terminal and couples a reference current to said control terminal when the control terminal is decoupled from said control voltage, a comparator that senses a voltage difference between said control voltage and said control terminal, and a timer coupled to an output of the comparator. The timer measures a time period required to increase the control terminal voltage. The capacitance of the actuator may be determined and used to calibrate the position of the actuator.Type: ApplicationFiled: July 12, 2012Publication date: November 1, 2012Inventors: Sang Ton Ngo, Thomas O'Brien, Sridhar Kotikalapoodi, M. Abid Hussain
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Patent number: 8258857Abstract: Embodiments of the present invention include charge pump circuits and methods. In one embodiment, a first charge pump receives a voltage and generates a first charge pump output voltage and current for supplying the power requirements of a circuit. A second charge pump is coupled in series with the first charge pump. The second charge pump generates a second charge pump output voltage and current for supplying different power requirements of the circuit. In one embodiment, the first charge pump provides a high current low voltage output to a first circuit and the second charge pump provides a low current high voltage output to a second circuit. Capacitors of the first charge pump may be external to an integrated circuit and capacitors of the second charge pump may be internal to the integrated circuit.Type: GrantFiled: August 25, 2010Date of Patent: September 4, 2012Assignee: Summit Microelectronics, Inc.Inventors: Kenneth C. Adkins, Sang Ton Ngo, M. Abid Hussain, Thomas O'Brien, Sridhar Kotikalapoodi, George A. Hall
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Patent number: 8237851Abstract: Embodiments of the present invention include circuits and methods for calibrating lens displacement in a voltage controlled actuator. In one embodiment, a calibration circuit comprises a programmable voltage source that provides a voltage to a control terminal of an actuator to set a lens displacement, a switch that selectively decouples said programmable voltage source from said control terminal, a current source that provides a reference current to said control terminal when the control terminal is decoupled from said programmable voltage source, a comparator that senses a voltage difference between said programmable voltage source and said control terminal, and a timer coupled to an output of the comparator. The timer measures a time period required to increase the control terminal voltage. The capacitance of the actuator may be determined and used to calibrate the position of a lens.Type: GrantFiled: July 2, 2009Date of Patent: August 7, 2012Assignee: Summit Microelectronics, IncInventors: Sang Ton Ngo, Thomas O'Brien, Sridhar Kotikalapoodi, M. Abid Hussain
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Publication number: 20120049936Abstract: Embodiments of the present invention include charge pump circuits and methods. In one embodiment, a first charge pump receives a voltage and generates a first charge pump output voltage and current for supplying the power requirements of a circuit. A second charge pump is coupled in series with the first charge pump. The second charge pump generates a second charge pump output voltage and current for supplying different power requirements of the circuit. In one embodiment, the first charge pump provides a high current low voltage output to a first circuit and the second charge pump provides a low current high voltage output to a second circuit. Capacitors of the first charge pump may be external to an integrated circuit and capacitors of the second charge pump may be internal to the integrated circuit.Type: ApplicationFiled: August 25, 2010Publication date: March 1, 2012Applicant: SUMMIT MICROELECTRONICS, INC.Inventors: Kenneth C. Adkins, Sang Ton Ngo, M. Abid Hussain, Thomas O'Brien, Sridhar Kotikalapoodi, George A. Hall
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Publication number: 20110001832Abstract: Embodiments of the present invention include circuits and methods for calibrating lens displacement in a voltage controlled actuator. In one embodiment, a calibration circuit comprises a programmable voltage source that provides a voltage to a control terminal of an actuator to set a lens displacement, a switch that selectively decouples said programmable voltage source from said control terminal, a current source that provides a reference current to said control terminal when the control terminal is decoupled from said programmable voltage source, a comparator that senses a voltage difference between said programmable voltage source and said control terminal, and a timer coupled to an output of the comparator. The timer measures a time period required to increase the control terminal voltage. The capacitance of the actuator may be determined and used to calibrate the position of a lens.Type: ApplicationFiled: July 2, 2009Publication date: January 6, 2011Applicant: Summit Microelectronics, Inc.Inventors: Sang Ton Ngo, Thomas O'Brien, Sridhar Kotikalapoodi, M. Abid Hussain
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Patent number: 7705557Abstract: Traditionally, system loads are placed in parallel with the battery. This simple topology wastes the available power if the USB power and/or wall adapter is present. Recent topologies have made some improvements by powering the load by the maximum available voltage. Thus, if a USB power source or wall adapter is present, the load is powered by them rather than the battery, thus improving the system efficiency. However, since the USB power and wall adapter power are current limited, if the load requires higher current than the current limited USB or adapter, then the entire system is powered at voltage of the battery. The present invention further improves the system efficiency by distinguishing the load and powering the constant power loads by the maximum voltage and placing the constant current loads in parallel with the battery.Type: GrantFiled: March 30, 2007Date of Patent: April 27, 2010Assignee: Broadcom CorporationInventors: Sridhar Kotikalapoodi, Farzan Roohparvar, Tivadar Szabo, Manisha Pandya
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Patent number: 7560916Abstract: A system and method providing output voltage control in a power supply circuit. Various aspects of the present invention may comprise at least a first module adapted to receive an input DC voltage and at least one voltage control signal and output an output DC voltage that is a function of the input DC voltage and the voltage control signal. At least a second module may be adapted to receive a feedback signal representative of the output DC voltage and output the at least one voltage control signal as a function of at least the feedback signal. The second module may, for example, be a digital module adapted to generate the at least one voltage control signal utilizing digital active components. The second module may also, for example, utilize transistors and/or passive components controlled by the digital active components to generate the at least one voltage control signal.Type: GrantFiled: January 19, 2006Date of Patent: July 14, 2009Assignee: Broadcom CorporationInventors: James Zeng, Sridhar Kotikalapoodi, Farzan Roohparvar
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Patent number: 7498786Abstract: A digital control system and method for use in switching type voltage regulators measures the rate of the change and the magnitude of the output voltage to change not only the pulse width but also the frequency of the pulses. A voltage regulator according to the present invention creates a more stable output voltage and responds more quickly to sudden changes in current load than prior analog and digitally controlled systems.Type: GrantFiled: December 1, 2003Date of Patent: March 3, 2009Assignee: Fairchild Semiconductor CorporationInventors: Francois X. Prinz, Sridhar Kotikalapoodi
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Publication number: 20080238203Abstract: Traditionally, system loads are placed in parallel with the battery. This simple topology wastes the available power if the USB power and/or wall adapter is present. Recent topologies have made some improvements by powering the load by the maximum available voltage. Thus, if a USB power source or wall adapter is present, the load is powered by them rather than the battery, thus improving the system efficiency. However, since the USB power and wall adapter power are current limited, if the load requires higher current than the current limited USB or adapter, then the entire system is powered at voltage of the battery. The present invention further improves the system efficiency by distinguishing the load and powering the constant power loads by the maximum voltage and placing the constant current loads in parallel with the battery.Type: ApplicationFiled: March 30, 2007Publication date: October 2, 2008Applicant: Broadcom CorporationInventors: Sridhar Kotikalapoodi, Farzan Roohparvar, Tivadar Szabo, Manisha Pandya
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Publication number: 20080129263Abstract: A method and apparatus is disclosed for an internal control circuit that switches transistors rapidly on and off to stabilize the output voltage or current of a switch-mode power supply (SMPS). The internal control circuit uses analog and digital signals to regulate the output voltage of the switch-mode power supply. The internal control circuit adjusts the output voltage using pulse width modulation. The duty cycle of the pulse is based upon the comparison of the output voltage and a reference level.Type: ApplicationFiled: December 5, 2006Publication date: June 5, 2008Applicant: Broadcom CorporationInventors: Sridhar Kotikalapoodi, James Zeng, Farzan Roohparvar