Patents by Inventor Ravishankar AYYAGARI
Ravishankar AYYAGARI 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).
-
Patent number: 11543504Abstract: Systems and methods are provided for imaging a surface via time of flight measurement. An illumination system includes an illumination driver and an illumination source and is configured to project modulated electromagnetic radiation to a point on a surface of interest. A sensor system includes a sensor driver and is configured to receive and demodulate electromagnetic radiation reflected from the surface of interest. A temperature sensor is configured to provide a measured temperature representing a temperature at one of the illumination driver and the sensor driver and located at a position remote from the one of the illumination driver and the sensor driver. A compensation component is configured to calculate a phase offset between the illumination system and the sensor system from at least the measured temperature and a model representing transient heat flow within the system.Type: GrantFiled: April 22, 2020Date of Patent: January 3, 2023Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Bharath Patil, Anjana Sharma, Subhash Chandra Venkata Sadhu, Ravishankar Ayyagari
-
Publication number: 20200249331Abstract: Systems and methods are provided for imaging a surface via time of flight measurement. An illumination system includes an illumination driver and an illumination source and is configured to project modulated electromagnetic radiation to a point on a surface of interest. A sensor system includes a sensor driver and is configured to receive and demodulate electromagnetic radiation reflected from the surface of interest. A temperature sensor is configured to provide a measured temperature representing a temperature at one of the illumination driver and the sensor driver and located at a position remote from the one of the illumination driver and the sensor driver. A compensation component is configured to calculate a phase offset between the illumination system and the sensor system from at least the measured temperature and a model representing transient heat flow within the system.Type: ApplicationFiled: April 22, 2020Publication date: August 6, 2020Inventors: Bharath Patil, Anjana Sharma, Subhash Chandra Venkata Sadhu, Ravishankar Ayyagari
-
Patent number: 10663566Abstract: Systems and methods are provided for imaging a surface via time of flight measurement. An illumination system includes an illumination driver and an illumination source and is configured to project modulated electromagnetic radiation to a point on a surface of interest. A sensor system includes a sensor driver and is configured to receive and demodulate electromagnetic radiation reflected from the surface of interest. A temperature sensor is configured to provide a measured temperature representing a temperature at one of the illumination driver and the sensor driver and located at a position remote from the one of the illumination driver and the sensor driver. A compensation component is configured to calculate a phase offset between the illumination system and the sensor system from at least the measured temperature and a model representing transient heat flow within the system.Type: GrantFiled: October 10, 2017Date of Patent: May 26, 2020Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Bharath Patil, Anjana Sharma, Subhash Chandra Venkata Sadhu, Ravishankar Ayyagari
-
Publication number: 20180031682Abstract: Systems and methods are provided for imaging a surface via time of flight measurement. An illumination system includes an illumination driver and an illumination source and is configured to project modulated electromagnetic radiation to a point on a surface of interest. A sensor system includes a sensor driver and is configured to receive and demodulate electromagnetic radiation reflected from the surface of interest. A temperature sensor is configured to provide a measured temperature representing a temperature at one of the illumination driver and the sensor driver and located at a position remote from the one of the illumination driver and the sensor driver. A compensation component is configured to calculate a phase offset between the illumination system and the sensor system from at least the measured temperature and a model representing transient heat flow within the system.Type: ApplicationFiled: October 10, 2017Publication date: February 1, 2018Inventors: Bharath Patil, Anjana Sharma, Subhash Chandra Venkata Sadhu, Ravishankar Ayyagari
-
Publication number: 20150253417Abstract: Systems and methods are provided for imaging a surface via time of flight measurement. An illumination system includes an illumination driver and an illumination source and is configured to project modulated electromagnetic radiation to a point on a surface of interest. A sensor system includes a sensor driver and is configured to receive and demodulate electromagnetic radiation reflected from the surface of interest. A temperature sensor is configured to provide a measured temperature representing a temperature at one of the illumination driver and the sensor driver and located at a position remote from the one of the illumination driver and the sensor driver. A compensation component is configured to calculate a phase offset between the illumination system and the sensor system from at least the measured temperature and a model representing transient heat flow within the system.Type: ApplicationFiled: March 9, 2015Publication date: September 10, 2015Inventors: BHARATH PATIL, ANJANA SHARMA, SUBHASH CHANDRA VENKATA SADHU, RAVISHANKAR AYYAGARI
-
Publication number: 20060268476Abstract: A switch provided between a first terminal and a second terminal with a varying cross terminal voltage. The switch contains two transistors, with the source terminal of the first transistor being coupled to the first terminal and a drain terminal of the second transistor being coupled to the second terminal. The gate terminal of the first transistor is coupled to the first terminal, the gate terminal of the second transistor is coupled to the second terminal, and the drain terminal of the first transistor is coupled to the source terminal of the second transistor. Due to such a topology, the cross-terminal voltage across the first and second terminals can be substantially higher than the voltage of the control signal indicating whether the switch is to be in on or off state.Type: ApplicationFiled: July 14, 2005Publication date: November 30, 2006Applicant: TEXAS INSTRUMENTS INCORPORATEDInventor: Ravishankar AYYAGARI
-
Publication number: 20060033561Abstract: An aspect of the present invention ensures that (substantially) equal common mode voltage is present at the input terminals of an operational amplifier (amplifying the residue signal in a stage of an ADC in two phases) while reducing the noise introduced into the amplified signal. Such a features is obtained by using a first reference capacitor which is coupled between an input terminal of the operational amplifier and a reference voltage in a first phase, and between the input terminal and a the reference voltage but with opposite polarity in the second phase.Type: ApplicationFiled: August 5, 2005Publication date: February 16, 2006Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Sandeep PERDOOR, Visvesvaraya PENTAKOTA, Ravishankar AYYAGARI
-
Publication number: 20050116760Abstract: Low voltage transistors are used in high voltage environment. The low voltage transistors may be used in the path of processing of a signal to increase the throughput performance. By using high voltage supply associated with the high voltage environment, a higher SNR may be attained. Various techniques are implemented to ensure that the low voltage transistors are not damaged by prolonged exposure to high voltages.Type: ApplicationFiled: November 29, 2003Publication date: June 2, 2005Applicant: Texas Instruments IncorporatedInventors: Anand Udupa, Visvesvaraya Pentakota, Shakti Rath, Gautam Nandi, Vineet Mishra, Ravishankar Ayyagari, Nitin Agarwal
-
Publication number: 20050046605Abstract: A bandwidth limited sampling circuit of high linearity may be implemented by using a first circuit portion to limit the bandwidth of the input signals, and using a second circuit portion to sample the bandwidth limited input signal. The first circuit portion and the second circuit portion may be implemented using separate components. In an alternative embodiment, bandwidth limiting is implemented by taking a difference of a sampled input signal from a sampled high frequency components of the input signal.Type: ApplicationFiled: July 26, 2004Publication date: March 3, 2005Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Ravishankar AYYAGARI, Visvesvaraya PENTAKOTA