Patents by Inventor Sriram Narayanan
Sriram Narayanan 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: 9599975Abstract: A method of synchronizing includes providing a sensor network including sensor nodes having object recognition sensors (ORS's) and building automation network nodes. The ORS's have partially overlapping fields of view in a sensed overlap area in the building. Movement of an individual through the sensed overlap area triggers dynamic synchronizing with the first sensor node waking up and sending a first RF request to join a subnet and for a schedule of wakeup times, the first sensor node receiving a response from any sensor node that receives the first request including synchronization information having times the first sensor node should wake up. The second sensor node is activated by the individual's movement and sends a second RF message to join the subnet and for a schedule of wakeup times. The first sensor node receives the second RF message and in response sends the synchronization information to the second sensor node.Type: GrantFiled: May 15, 2014Date of Patent: March 21, 2017Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Leonardo William Estevez, Sriram Narayanan, Gangadhar Burra
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Patent number: 9578336Abstract: A computing device (300) includes a storage (325) that over time is operable to include video and graphics content and the storage has a first set of instructions representing lossy video compression (130) and a second set of instructions representing lossless compression (120); and a processor (320) coupled with said storage (325), and said processor (320) operable to electronically analyze (110) at least a portion of the content for motion based on magnitudes of motion vectors and, on detection of a significant amount of motion, further operable to activate the first set of instructions (130) to compress at least the motion video, and otherwise to activate the second set of instructions representing lossless compression (120) to compress at least the graphics. Other devices, systems, and processes are disclosed.Type: GrantFiled: June 7, 2012Date of Patent: February 21, 2017Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Thanh Thien Tran, Jonathan Edward Hunter, Sriram Narayanan, Jian Wang
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Publication number: 20160380660Abstract: Reduced noise and power with rapid settling time and increased performance in multi-modal analog multiplexed data acquisition systems. An example apparatus arrangement includes a circuit input configured to receive a plurality of analog input signals; an analog to digital converter circuit configured to output a digital representation of an analog voltage; a selection circuit configured to select one of the analog input signals received at the circuit input; a buffer coupled to receive the selected one of the analog input signals; a filter coupled to the buffer and configured to perform a high bandwidth sample operation and a low bandwidth sample operation and having a filter output, responsive to a control signal; and a sampling capacitor coupled to the filter to sample the filter output, and having an output coupled to the analog to digital converter. Methods and additional apparatus arrangements are disclosed.Type: ApplicationFiled: March 29, 2016Publication date: December 29, 2016Inventors: Arup Polley, Ajit Sharma, Seung Bae Lee, Sriram Narayanan, Srinath Ramaswamy
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Publication number: 20160369780Abstract: A structure of a floating, semi-submersible wind turbine platform is provided. The floating wind turbine platform includes three elongate stabilizing columns, each having a top end, a keel end, and an outer shell containing an inner shaft. Each stabilizing column further includes a water entrapment plate at its keel cantilevered in a plane perpendicular to a longitudinal axis of the stabilizing column. The floating wind turbine platform also includes three truss members, each truss member including two horizontal main tubular members and two diagonal tubular members. The truss members connect the stabilizing columns to form a triangular cross-section. An elongate wind turbine tower is disposed over the top end of one of the three stabilizing columns such that the longitudinal axis of the tower is substantially parallel to the longitudinal axis of the stabilizing column.Type: ApplicationFiled: June 17, 2016Publication date: December 22, 2016Applicant: PRINCIPLE POWER, INC.Inventors: Alexia Aubault, Cermelli Christian, Dominique Roddier, Bing Bin Yu, Sriram Narayanan, Alireza Lahijanian
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Publication number: 20160235313Abstract: The circuitry of an optical receiver reduces the ambient DC component and the pleth DC component to leave a pleth signal with substantially only a pleth AC component. The circuitry also provides gain control and can provide transmit power control to change the range of the pleth AC component to occupy a desired input range of an analog-to-digital converter.Type: ApplicationFiled: August 27, 2015Publication date: August 18, 2016Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Ajit Sharma, Sriram Narayanan, Srinath Mathur Ramaswamy, Arup Polley, Seung Bae Lee, Wen Li
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Patent number: 9397685Abstract: Described examples include low power analog front end circuits for sensing repeating signal waveforms, including a first sampling circuit to sample an input signal, an analog detector circuit to provide a detector output signal representing a feature of the input signal, a second sampling circuit to sample the detector output signal, and a control circuit to control a sample rate or other analog front end operating parameter at least partially according to the sampled detector output signal, and to selectively enable and disable the analog detector circuit at least partially according to a model representing an expected repeating waveform of the input signal.Type: GrantFiled: July 23, 2015Date of Patent: July 19, 2016Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Sriram Narayanan, Srinath Mathur Ramaswamy, Arup Polley, Ajit Sharma
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Publication number: 20160109261Abstract: A sensor power management arrangement includes a signal processing circuit configured to receive signal from a sensor, to test the signal against at least one criterion, and to pass the signal for further processing in response to the signal passing the at least one criterion. In this way, only signals that are of a sufficient importance or significance will consume the maximum amount of processing energy and through processing by later processes or circuitry. Should a signal from a sensor not be strong enough or meet other criteria, power will not be wasted in preparing that signal for provision to the microcontroller or microprocessor. Additional flexibility in the sensor power management can be realized by adjusting the criteria against which the sensor signal is compared based on a status of the sensor apparatus.Type: ApplicationFiled: December 28, 2015Publication date: April 21, 2016Inventors: Sriram Narayanan, David Louis Freeman, Marco Corsi
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Patent number: 9319059Abstract: The silicon real estate required for the semiconductor fabrication of a calibrated capacitor-based successive approximation register (SAR) analog-to-digital converter (ADC) (100) is substantially reduced by using a number of shared capacitors (SC1-SCs?1) which are used as calibration capacitors when operating in a calibration mode and as bit capacitors when operating in a normal mode.Type: GrantFiled: June 6, 2015Date of Patent: April 19, 2016Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Ajit Sharma, Seung Bae Lee, Srinath Mathur Ramaswamy, Sriram Narayanan, Arup Polley
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Patent number: 9222802Abstract: A sensor power management arrangement includes a signal processing circuit configured to receive signal from a sensor, to test the signal against at least one criterion, and to pass the signal for further processing in response to the signal passing the at least one criterion. In this way, only signals that are of a sufficient importance or significance will consume the maximum amount of processing energy and through processing by later processes or circuitry. Should a signal from a sensor not be strong enough or meet other criteria, power will not be wasted in preparing that signal for provision to the microcontroller or microprocessor. Additional flexibility in the sensor power management can be realized by adjusting the criteria against which the sensor signal is compared based on a status of the sensor apparatus.Type: GrantFiled: March 29, 2012Date of Patent: December 29, 2015Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Sriram Narayanan, David Louis Freeman, Marco Corsi
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Publication number: 20150334353Abstract: A method of synchronizing includes providing a sensor network including sensor nodes having object recognition sensors (ORS's) and building automation network nodes. The ORS's have partially overlapping fields of view in a sensed overlap area in the building. Movement of an individual through the sensed overlap area triggers dynamic synchronizing with the first sensor node waking up and sending a first RF request to join a subnet and for a schedule of wakeup times, the first sensor node receiving a response from any sensor node that receives the first request including synchronization information having times the first sensor node should wake up. The second sensor node is activated by the individual's movement and sends a second RF message to join the subnet and for a schedule of wakeup times. The first sensor node receives the second RF message and in response sends the synchronization information to the second sensor node.Type: ApplicationFiled: May 15, 2014Publication date: November 19, 2015Applicant: Texas Instruments IncorporatedInventors: LEONARDO WILLIAM ESTEVEZ, SRIRAM NARAYANAN, GANGADHAR BURRA
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Patent number: 9148159Abstract: An analog-to-digital converter (ADC) includes a first comparator, a second comparator, and a decision timing comparison logic unit. The first comparator is configured to output a first output voltage and the second comparator is configured to output a second output voltage during a same binary algorithmic iteration of the ADC. The decision timing comparison logic unit is configured to identify a first polarity of the first output voltage and a second polarity of the second output voltage and, if the first polarity is equivalent to a second polarity, to insert at least one redundant capacitor for a next binary algorithmic iteration of the ADC.Type: GrantFiled: March 13, 2014Date of Patent: September 29, 2015Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Ajit Sharma, Seung Bae Lee, Srinath M. Ramaswamy, Sriram Narayanan, Arup Polley
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Publication number: 20150263744Abstract: An analog-to-digital converter (ADC) includes a first comparator, a second comparator, and a decision timing comparison logic unit. The first comparator is configured to output a first output voltage and the second comparator is configured to output a second output voltage during a same binary algorithmic iteration of the ADC. The decision timing comparison logic unit is configured to identify a first polarity of the first output voltage and a second polarity of the second output voltage and, if the first polarity is equivalent to a second polarity, to insert at least one redundant capacitor for a next binary algorithmic iteration of the ADC.Type: ApplicationFiled: March 13, 2014Publication date: September 17, 2015Applicant: Texas Instruments IncorporatedInventors: Ajit Sharma, Seung Bae Lee, Srinath M. Ramaswamy, Sriram Narayanan, Arup Polley
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Patent number: 9007244Abstract: A mixed signal device includes an analog circuit and a digital circuit coupled to the analog circuit. The digital circuit includes a component that samples a signal at a sampling rate that is dynamically variable by the digital circuit based on the bandwidth of the incoming signal. The digital circuit is to automatically assert a signal to the analog circuit to change a bias current of the analog circuit based on a change to the sampling rate in the digital circuit.Type: GrantFiled: July 1, 2014Date of Patent: April 14, 2015Assignee: Texas Instruments IncorporatedInventors: Ajit Sharma, Sriram Narayanan, Srinath M. Ramaswamy
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Publication number: 20150067119Abstract: A network of sensor and controller nodes having the ability to be dynamically programmed and receive updated software from one another, and from a host system. Each network node includes multiple state machines, at least some of which are operable relative to physical pins at the network node; the physical pins correspond to inputs from sensor functions or outputs to control functions. The network nodes include microcontrollers that are operable in an operating mode to execute a state machine and respond to commands from other nodes or the host, and in a read mode to receive and store program instructions transmitted from other nodes or the host. A learn mode is also provided, by way of which a network node can store program code corresponding to instructions and actions at the node when under user control.Type: ApplicationFiled: August 30, 2013Publication date: March 5, 2015Applicant: Texas Instruments IncorporatedInventors: Leonardo William Estevez, Sriram Narayanan
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Publication number: 20150002324Abstract: A mixed signal device includes an analog circuit and a digital circuit coupled to the analog circuit. The digital circuit includes a component that samples a signal at a sampling rate that is dynamically variable by the digital circuit based on the bandwidth of the incoming signal. The digital circuit is to automatically assert a signal to the analog circuit to change a bias current of the analog circuit based on a change to the sampling rate in the digital circuit.Type: ApplicationFiled: July 1, 2014Publication date: January 1, 2015Inventors: Ajit SHARMA, Sriram NARAYANAN, Srinath M. RAMASWAMY
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Publication number: 20140241581Abstract: A periphery band is around an excluded region. For automatically counting physical objects within the periphery band and the excluded region, an imaging sensor captures: a first image of the periphery band and the excluded region; and a second image of the periphery band and the excluded region. In response to the first image, a first number is counted of physical objects within the periphery band and the excluded region. Relevant motion is automatically detected within the periphery band, while ignoring motion within the excluded region. In response to the second image, a second number is counted of physical objects within the periphery band and the excluded region. In response to determining that a discrepancy exists between the detected relevant motion and the second number, the discrepancy is handled.Type: ApplicationFiled: February 25, 2014Publication date: August 28, 2014Inventors: Sriram Narayanan, Russell Rosenquist, Srinath Ramaswamy
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Publication number: 20130262036Abstract: A sensor power management arrangement includes a signal processing circuit configured to receive signal from a sensor, to test the signal against at least one criterion, and to pass the signal for further processing in response to the signal passing the at least one criterion. In this way, only signals that are of a sufficient importance or significance will consume the maximum amount of processing energy and through processing by later processes or circuitry. Should a signal from a sensor not be strong enough or meet other criteria, power will not be wasted in preparing that signal for provision to the microcontroller or microprocessor. Additional flexibility in the sensor power management can be realized by adjusting the criteria against which the sensor signal is compared based on a status of the sensor apparatus.Type: ApplicationFiled: March 29, 2012Publication date: October 3, 2013Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Sriram Narayanan, David Louis Freeman, Marco Corsi
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Publication number: 20130050254Abstract: A computing device (300) includes a storage (325) that over time is operable to include video and graphics content and the storage has a first set of instructions representing lossy video compression (130) and a second set of instructions representing lossless compression (120); and a processor (320) coupled with said storage (325), and said processor (320) operable to electronically analyze (110) at least a portion of the content for motion based on magnitudes of motion vectors and, on detection of a significant amount of motion, further operable to activate the first set of instructions (130) to compress at least the motion video, and otherwise to activate the second set of instructions representing lossless compression (120) to compress at least the graphics. Other devices, systems, and processes are disclosed.Type: ApplicationFiled: June 7, 2012Publication date: February 28, 2013Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Thanh Thien Tran, Jonathan Edward Hunter, Sriram Narayanan, Jian Wang
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Publication number: 20120263252Abstract: Statistical analysis may be requested for a solar panel system. Each section of the panel may be assigned to a particular slice of an OFDM transmission scheme. The photovoltaic (PV) modules are divided into strings of modules and a spectrum of frequencies is divided into sub-channels. Then each string is assigned into a timeslot data related PV modules is transmitted on a particular sub-channel during the assigned timeslot.Type: ApplicationFiled: April 12, 2011Publication date: October 18, 2012Applicant: Texas Instruments IncorporatedInventor: Sriram Narayanan