Patents by Inventor Saurav Bandyopadhyay
Saurav Bandyopadhyay 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).
-
Publication number: 20210013805Abstract: In some examples, a system includes a voltage source terminal, a voltage reference terminal, a field effect transistor (FET), a current source, a comparator, and adjustment circuitry. The FET has a gate terminal and a non-gate terminal, the gate terminal coupled to the voltage source terminal. The current source is coupled to the non-gate terminal. The comparator has a comparator output and first and second comparator inputs, the first comparator input coupled to the non-gate terminal, and the second comparator input coupled to the voltage reference terminal. The adjustment circuitry has a circuitry input and a circuitry output, the circuitry input coupled to the comparator output, and the adjustment circuitry configured to adjust the circuitry output responsive to the circuitry input, in which the adjustment reduces a drive strength of the circuit.Type: ApplicationFiled: July 13, 2020Publication date: January 14, 2021Inventors: Robert Allan NEIDORFF, Saurav BANDYOPADHYAY, Ramanathan RAMANI
-
Publication number: 20200373831Abstract: An active electromagnetic interference (EMI) filter includes a first amplifier and a second amplifier. The first amplifier is configured to sense noise signals on a power conductor. The second amplifier is coupled to the first amplifier and is configured to drive a cancellation signal onto the power conductor. The cancellation signal is to reduce the amplitude of the noise signals sensed by the first amplifier. An output impedance of the second amplifier is lower than an output impedance of the first amplifier.Type: ApplicationFiled: August 11, 2020Publication date: November 26, 2020Inventors: Yongbin CHU, Yogesh RAMADASS, Saurav BANDYOPADHYAY, Todd Allen TOPORSKI, Jeffrey Anthony MORRONI
-
Patent number: 10840797Abstract: Aspects of the disclosure provide for a circuit. In some examples, the circuit includes a first comparator, a second comparator, and a logic circuit. The first comparator includes a first input terminal coupled to a first node, a second input terminal coupled to a second node, and an output terminal. The second comparator includes a first input terminal coupled to the first node, a second input terminal coupled to a third node, and an output terminal. The logic circuit includes a first input terminal coupled to the output terminal of the first comparator, a second input terminal coupled to the output terminal of the second comparator, and an output terminal. The logic circuit is configured to determine a change in current over time based on analyzing an output signal of the first comparator and an output signal of the second comparator over a plurality of sequential cycles of operation.Type: GrantFiled: October 31, 2019Date of Patent: November 17, 2020Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Saurav Bandyopadhyay, Thomas Matthew LaBella, Robert Allan Neidorff
-
Publication number: 20200336738Abstract: Systems, methods, and Instrumentalities are described herein for calculating local Illumination compensation (LIC) parameters for bi-predicted coding unit (CU). The LIC parameters may be used to generate adjusted samples for the current CU and to address local illumination changes that may exist among temporal neighboring pictures. LIC parameters may be calculated based on bi-predicted reference template samples and template samples for a current CU. Bi-predicted reference template samples may be generated based on reference template samples neighboring temporal reference CUs. For example, the bi-predicted reference template samples may be generated based on averaging the reference template samples. The reference template samples may correspond to template samples for the current CU. A CU may be or may include a coding block and/or a sub-block that may be derived by dividing the coding block.Type: ApplicationFiled: January 15, 2019Publication date: October 22, 2020Applicant: VID SCALE, INC.Inventors: Xiaoyu Xiu, Yuwen He, Yan Ye, Saurav Bandyopadhyay
-
Patent number: 10778089Abstract: An active electromagnetic interference (EMI) filter includes a first amplifier and a second amplifier. The first amplifier is configured to sense noise signals on a power conductor. The second amplifier is coupled to the first amplifier and is configured to drive a cancellation signal onto the power conductor. The cancellation signal is to reduce the amplitude of the noise signals sensed by the first amplifier. An output impedance of the second amplifier is lower than an output impedance of the first amplifier.Type: GrantFiled: September 26, 2017Date of Patent: September 15, 2020Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Yongbin Chu, Yogesh Ramadass, Saurav Bandyopadhyay, Todd Allen Toporski, Jeffrey Anthony Morroni
-
Publication number: 20200169159Abstract: Aspects of the disclosure provide for a circuit. In some examples, the circuit includes a first comparator, a second comparator, and a logic circuit. The first comparator includes a first input terminal coupled to a first node, a second input terminal coupled to a second node, and an output terminal. The second comparator includes a first input terminal coupled to the first node, a second input terminal coupled to a third node, and an output terminal. The logic circuit includes a first input terminal coupled to the output terminal of the first comparator, a second input terminal coupled to the output terminal of the second comparator, and an output terminal. The logic circuit is configured to determine a change in current over time based on analyzing an output signal of the first comparator and an output signal of the second comparator over a plurality of sequential cycles of operation.Type: ApplicationFiled: October 31, 2019Publication date: May 28, 2020Inventors: Saurav BANDYOPADHYAY, Thomas Matthew LaBELLA, Robert Allan NEIDORFF
-
Publication number: 20200136508Abstract: A circuit includes a first transistor and a second transistor coupled to the first transistor at a switch node and to a ground node. An estimator circuit receives a first signal to control an on and off state of the first transistor. The estimator circuit generates a second signal to control the on and off state of the second transistor. The second signal has a pulse width based on a pulse width of the first signal. A clocked comparator includes a clock input, a first input, and a second input. The first input receives a voltage indicative of a voltage of the switch node. The second input is coupled to a ground node. The clock input receives a third signal indicative of the second signal. The clocked comparator generates a comparator output signal. The estimator circuit adjusts the pulse width of the second signal based on the comparator output signal.Type: ApplicationFiled: April 30, 2019Publication date: April 30, 2020Inventors: Saurav Bandyopadhyay, Michael G. Amaro, Michael Thomas DiRenzo, Thomas Matthew LaBella, Robert Allan Neidorff
-
Publication number: 20200041356Abstract: Methods and apparatus to provide an adaptive gate driver for switching devices are disclosed. An example apparatus includes an electrical switch to drive an electrical system; a condition characterizer to select a drive strength based on a first system parameter corresponding to the electrical system, the first system parameter including at least one of an input voltage corresponding to the electrical switch, an output current corresponding to the electrical switch, or a process variation of the electrical switch; and a driver to generate an output having a current corresponding to the selected drive strength.Type: ApplicationFiled: July 31, 2018Publication date: February 6, 2020Inventors: Robert Allan Neidorff, Saurav Bandyopadhyay, Thomas Matthew LaBella
-
Publication number: 20200021196Abstract: In a described example, an apparatus includes a first switch coupled between a terminal for receiving an input voltage and a top plate node, and having a first control terminal; a second switch coupled between the top plate node and a switching node, and having a second control terminal; a third switch coupled between the switching node and a bottom plate node and having a third control terminal; a fourth switch coupled between the bottom plate node and a ground terminal, and having a fourth control terminal; a flying capacitor coupled between the top plate node and the bottom plate node; a fifth switch coupled between the top plate node and an auxiliary node; a sixth switch coupled between the auxiliary node and the bottom plate node; and an auxiliary capacitor coupled between the auxiliary control terminal and a ground terminal.Type: ApplicationFiled: September 26, 2019Publication date: January 16, 2020Inventors: Kevin Scoones, Orlando Lazaro, Alvaro Aguilar, Jeffrey Anthony Morroni, Reza Sharifi, Saurav Bandyopadhyay
-
Patent number: 10468988Abstract: In a described example, an apparatus includes a first switch coupled between a terminal for receiving an input voltage and a top plate node, and having a first control terminal; a second switch coupled between the top plate node and a switching node, and having a second control terminal; a third switch coupled between the switching node and a bottom plate node and having a third control terminal; a fourth switch coupled between the bottom plate node and a ground terminal, and having a fourth control terminal; a flying capacitor coupled between the top plate node and the bottom plate node; a fifth switch coupled between the top plate node and an auxiliary node; a sixth switch coupled between the auxiliary node and the bottom plate node; and an auxiliary capacitor coupled between the auxiliary control terminal and a ground terminal.Type: GrantFiled: August 8, 2018Date of Patent: November 5, 2019Assignee: Texas Instruments IncorporatedInventors: Kevin Scoones, Orlando Lazaro, Alvaro Aguilar, Jeffrey Anthony Morroni, Reza Sharifi, Saurav Bandyopadhyay
-
Patent number: 10387704Abstract: Disclosed is an apparatus and method for automatically enabling a touchscreen of a mobile device based on detection of the presence of a human finger. A mobile device can capture an image of an object with a fingerprint sensor. The mobile device may then enable a touchscreen display of the mobile device in response to a determination that the object captured within the image is a specific type of object.Type: GrantFiled: September 15, 2015Date of Patent: August 20, 2019Assignee: Qualcomm IncorporatedInventors: Noam Dagan, Ravit Dennis, Lior Barenboim, Lior David, Eliza Du, Saurav Bandyopadhyay
-
Publication number: 20190028031Abstract: In a described example, an apparatus includes a first switch coupled between a terminal for receiving an input voltage and a top plate node, and having a first control terminal; a second switch coupled between the top plate node and a switching node, and having a second control terminal; a third switch coupled between the switching node and a bottom plate node and having a third control terminal; a fourth switch coupled between the bottom plate node and a ground terminal, and having a fourth control terminal; a flying capacitor coupled between the top plate node and the bottom plate node; a fifth switch coupled between the top plate node and an auxiliary node; a sixth switch coupled between the auxiliary node and the bottom plate node; and an auxiliary capacitor coupled between the auxiliary control terminal and a ground terminal.Type: ApplicationFiled: August 8, 2018Publication date: January 24, 2019Inventors: Kevin Scoones, Orlando Lazaro, Alvaro Aguilar, Jeffrey Anthony Morroni, Reza Sharifi, Saurav Bandyopadhyay
-
Patent number: 10141845Abstract: Disclosed examples provide DC-DC converters and control circuits to provide high and low-side driver signals and to selectively adjust a delay time between a low-side switching device turning off and a high-side switching device turning on according to a comparator signal, including a clocked comparator circuit referenced to a switching node to sample the voltage across the high-side switching device in response to a first edge of the high-side driver signal, and to generate the comparator signal indicating a polarity of the sampled high-side switch voltage to facilitate zero voltage switching of the high-side switching device.Type: GrantFiled: December 1, 2016Date of Patent: November 27, 2018Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Saurav Bandyopadhyay, Robert A. Neidorff
-
Patent number: 10141846Abstract: A method of controlling a power converter, including executing a plurality of cycles, including: turning on a first switch during a first period, the first switch coupled to a power supply and a switch node; turning on a second switch during a second period, the second switch coupled to the switch node; turning on a third switch at a first time during the second period and turning the third switch off at a second time after the second period by a first open signal including a high discharge signal followed by a lower discharge signal, the third switch coupled to an auxiliary node and to a second inductor coupled to the auxiliary node; and turning on a fourth switch at a third time after the second time and turning the fourth switch off during the first period of a succeeding cycle, the fourth switch coupled to the auxiliary node.Type: GrantFiled: December 31, 2016Date of Patent: November 27, 2018Assignee: TEXAS INSTRUMENTS INCORPORATEDInventor: Saurav Bandyopadhyay
-
Publication number: 20180294714Abstract: An active electromagnetic interference (EMI) filter includes a first amplifier and a second amplifier. The first amplifier is configured to sense noise signals on a power conductor. The second amplifier is coupled to the first amplifier and is configured to drive a cancellation signal onto the power conductor. The cancellation signal is to reduce the amplitude of the noise signals sensed by the first amplifier. An output impedance of the second amplifier is lower than an output impedance of the first amplifier.Type: ApplicationFiled: September 26, 2017Publication date: October 11, 2018Inventors: Yongbin CHU, Yogesh RAMADASS, Saurav BANDYOPADHYAY, Todd Allen TOPORSKI, Jeffrey Anthony MORRONI
-
Patent number: 10075080Abstract: In a described example, an apparatus includes a first switch coupled between a terminal for receiving an input voltage and a top plate node, and having a first control terminal; a second switch coupled between the top plate node and a switching node, and having a second control terminal; a third switch coupled between the switching node and a bottom plate node and having a third control terminal; a fourth switch coupled between the bottom plate node and a ground terminal, and having a fourth control terminal; a flying capacitor coupled between the top plate node and the bottom plate node; a fifth switch coupled between the top plate node and an auxiliary node; a sixth switch coupled between the auxiliary node and the bottom plate node; and an auxiliary capacitor coupled between the auxiliary control terminal and a ground terminal.Type: GrantFiled: September 6, 2017Date of Patent: September 11, 2018Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Kevin Scoones, Orlando Lazaro, Alvaro Aguilar, Jeffrey Anthony Morroni, Reza Sharifi, Saurav Bandyopadhyay
-
Publication number: 20180191256Abstract: Embodiments include systems, methods, and apparatuses for controlling off-time during a burst mode in an LLC converter. In one embodiment, a circuit comprises an LLC converter having a primary side and a burst mode controller, the burst mode controller configured to monitor, on the primary side of the LLC converter, electrical current, and in response to a determination that the electrical current is below a first threshold, increase an off-time for switches in the LLC converter and in response to a determination that the electrical current is above a second threshold that is higher than the first threshold, decrease the off-time for the switches in the LLC converter.Type: ApplicationFiled: December 30, 2016Publication date: July 5, 2018Inventors: Salvatore Giombanco, Saurav Bandyopadhyay, Rosario Davide Stracquadaini
-
Publication number: 20180191271Abstract: Embodiments includes systems, methods, and apparatuses for determining a resonant frequency of an LLC converter via a primary side of the LLC converter. In one embodiment, a circuit comprises an LLC converter and a resonant frequency determination unit, the resonant frequency determination unit configured to monitor electrical current on the primary side of the LLC converter, isolate a portion of the electrical current, determine, based on the portion of the electrical current, a crossing point, and determine, based on the crossing point, a resonant frequency of the LLC converter.Type: ApplicationFiled: December 30, 2016Publication date: July 5, 2018Inventors: Salvatore Giombanco, Saurav Bandyopadhyay, Salvatore Vincenzo Capici
-
Patent number: 9953233Abstract: A method of determining whether a biometric object is part of a live individual is described. In one such method, image information is acquired from the biometric object by using a sensor, such as an ultrasonic sensor. The image information may be analyzed in at least two analysis stages. One of the analysis stages may be a temporal analysis stage that analyzes changes in the image information obtained during a time period throughout which the biometric object was continuously available to the sensor. For example, a dead/alive stage may analyze differences between image information taken at two different times in order to identify changes from one time to the next. Other stages may focus on aspects of a particular image information set, rather than seeking to assess changes over time. These other stages seek to determine whether an image information set exhibits characteristics similar to those of a live biometric object.Type: GrantFiled: March 28, 2017Date of Patent: April 24, 2018Assignee: QUALCOMM IncorporatedInventors: Eliza Yingzi Du, Ming Yu Chen, Esra Vural, Kwokleung Chan, David William Burns, Suryaprakash Ganti, John Keith Schneider, Saurav Bandyopadhyay, Jin Gu
-
Patent number: 9853547Abstract: An example apparatus includes a first switch having a control terminal, coupled to a voltage source and coupled to a switch node; a second switch having a control terminal, coupled to the switch node and to a voltage reference; a first inductor coupled to the switch node and to a load; a third switch having a control terminal, coupled to the voltage source and to an auxiliary node; a fourth switch having a control terminal, coupled to the auxiliary node and to the voltage reference; a second inductor coupled to the switch node and the auxiliary node; a fifth switch having a control terminal, coupled to the switch node and to the auxiliary node; and timing circuitry configured to output signals to the control terminals of the first switch, the second switch, the third switch, the fourth switch and the fifth switch to supply current to the load.Type: GrantFiled: December 31, 2016Date of Patent: December 26, 2017Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Saurav Bandyopadhyay, Thomas Matthew LaBella