Sriram P Narayanan, 45800 W Renner Rd APT 1027, Richardson, TX 75080

2013005, Feb 28, 2013

Jun 7, 2012

13/490639

Thanh Thien Tran - Houston TX, US
Jonathan Edward Hunter - Stafford TX, US
Sriram Narayanan - Richardson TX, US
Jian Wang - Stafford TX, US

TEXAS INSTRUMENTS INCORPORATED - Dallas TX

G06T 1/00
G09G 5/00

345629, 345501

A computing device () includes a storage () that over time is operable to include video and graphics content and the storage has a first set of instructions representing lossy video compression () and a second set of instructions representing lossless compression (); and a processor () coupled with said storage (), and said processor () operable to electronically analyze () 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 () to compress at least the motion video, and otherwise to activate the second set of instructions representing lossless compression () to compress at least the graphics. Other devices, systems, and processes are disclosed.

2013026, Oct 3, 2013

Mar 29, 2012

13/433546

Sriram Narayanan - Richardson TX, US
David Louis Freeman - McKinney TX, US
Marco Corsi - Parker TX, US

TEXAS INSTRUMENTS INCORPORATED - Dallas TX

G06F 15/00

702190, 702189

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.

2012026, Oct 18, 2012

Apr 12, 2011

13/084553

Sriram Narayanan - Richardson TX, US

Texas Instruments Incorporated - Dallas TX

H04L 1/02

375267

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.

2017009, Apr 6, 2017

Apr 18, 2016

15/131831

- Dallas TX, US
Ajit Sharma - Dallas TX, US
Srinath Ramaswamy - Murphy TX, US
Sriram Narayanan - Richardson TX, US

H05B 33/08
A61B 5/1455
A61B 5/024

An LED (light-emitting diode) driver for a photoplethysmography system, including a switched-mode operational amplifier for driving a driver transistor with a source-drain path in series with the LED. In a first clock phase in which the LED is disconnected from the driver transistor, the amplifier is coupled in unity gain mode, and a sampling capacitor stores a voltage corresponding to the offset and flicker noise of the amplifier; the gate of the driver transistor is precharged to a reference voltage in this first clock phase. In a second clock phase, the sampled voltage at the capacitor is subtracted from the reference voltage applied to the amplifier input, so that the LED drive is adjusted according to the sampled noise. A signal from the transmitter channel is forwarded to a noise/ripple remover in the receiving channel, to remove transmitter noise from the received signal.

2016038, Dec 29, 2016

Mar 29, 2016

15/084052

- Dallas TX, US
Ajit Sharma - Dallas TX, US
Seung Bae Lee - Allen TX, US
Sriram Narayanan - Richardson TX, US
Srinath Ramaswamy - Murphy TX, US

H04B 1/10

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.

2016023, Aug 18, 2016

Aug 27, 2015

14/837179

- Dallas TX, US
Sriram Narayanan - Richardson TX, US
Srinath Mathur Ramaswamy - Murphy TX, US
Arup Polley - Richardson TX, US
Seung Bae Lee - Allen TX, US
Wen Li - McKinney TX, US

TEXAS INSTRUMENTS INCORPORATED - Dallas TX

A61B 5/024
A61B 5/00

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.

2015033, Nov 19, 2015

May 15, 2014

14/278661

- Dallas TX, US
SRIRAM NARAYANAN - RICHARDSON TX, US
GANGADHAR BURRA - PLANO TX, US

Texas Instruments Incorporated - Dallas TX

H04N 7/18
G05B 19/05
H04W 52/02

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.

2015026, Sep 17, 2015

Mar 13, 2014

14/209813

- Dallas TX, US
Seung Bae Lee - Atlanta GA, US
Srinath M. Ramaswamy - Murphy TX, US
Sriram Narayanan - Richardson TX, US
Arup Polley - Richardson TX, US

Texas Instruments Incorporated - Dallas TX

H03M 1/06
H03M 1/36
H03M 1/44
H03M 1/12

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.