Patents by Inventor Kumar Anurag

Kumar Anurag 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: 20200007189
    Abstract: An inductively coupled multi-channel digital isolator where the transmitter and receiver inductive loops of a given channel are coplanar. In the case where two adjacent channels flow data in opposite directions, the receiver inductive loops of a given channel include a large, generally conventional loop portion and a small loop portion that is located inside the transmitter inductive loops of the adjacent channels. The sizes of the small loop portion and the conventional loop portion are generally in the ratio of the magnetic flux in the conventional loop portion to the magnetic flux in the transmitter inductive loop. This size relationship results in the voltage of the small loop portion being very close but opposite in sign to the voltage in the conventional loop portion. As a result, there is minimal crosstalk from the transmitter inductive loop of one channel to the receiver inductive loop of the adjacent channel.
    Type: Application
    Filed: June 28, 2018
    Publication date: January 2, 2020
    Inventor: Kumar Anurag SHRIVASTAVA
  • Publication number: 20190362890
    Abstract: A device [200, para. 16] includes a transformer [206, para. 16] that further includes a primary [208, para. 16] and a secondary [210, para. 16] windings. A switch [212, para. 20] is coupled to the primary winding, and this switch is controlled by the received digital input signal. An oscillator [216, para. 17] is further formed on the secondary winding where the oscillator oscillates in response to variations of the received input signal. [para. 19] A detector [218, para. 17] coupled to the oscillator will then detect the oscillations in response to the variations of the received input signal. Thereafter, the detector generates a digital output [108, para. 14] based on the detected oscillations. [para.
    Type: Application
    Filed: May 22, 2018
    Publication date: November 28, 2019
    Inventors: Sreeram Subramanyam Nasum, Tarunvir Singh, Suvadip Banerjee, Kumar Anurag Shrivastava
  • Patent number: 10483909
    Abstract: Methods and apparatus are disclosed to generate an oscillating output signal having a voltage swing greater than a voltage swing across nodes of active devices. An example oscillator includes a tank to generate an oscillating output signal in response receiving an edge of an enable signal; a feedback generator including a first gain stage forming a first feedback loop with the tank, the first feedback loop providing a first charge to maintain the oscillating output signal and a second gain stage forming a second feedback loop with the tank, the second feedback loop providing a second charge to maintain the oscillating output signal, the first and second charges combining with the oscillating output signal to generate a high voltage swing; and an attenuator connected between the tank and the feedback generator to isolate the tank from active components of the feedback generator.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: November 19, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Subhashish Mukherjee, Kumar Anurag Shrivastava, Madhulatha Bonu
  • Patent number: 10447202
    Abstract: Apparatus for communication across a capacitively coupled channel are disclosed herein. An example circuit includes a first plate substantially parallel to a substrate, thereby forming a first capacitance intermediate the first plate and the substrate. A second plate is substantially parallel to the substrate and the first plate, the first plate intermediate the substrate and the second plate. A third plate is substantially parallel to the substrate, thereby forming a second capacitance intermediate the third plate and the substrate. A fourth plate is substantially parallel to the substrate and the third plate, the third plate intermediate the substrate and the fourth plate. An inductor is connected to the first plate and the third plate, the inductor to, in combination with the first capacitance and the second capacitance, form an LC amplifier.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: October 15, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Subhashish Mukherjee, Kumar Anurag Shrivastava, Sreeram Subramanyam Nasum
  • Publication number: 20190278245
    Abstract: A method of detecting crosstalk for a digital isolator having first and second channels including two die with channels including a transmit side, receive side, with ?1 die including a capacitive barrier for each channel. A first clock signal at a first frequency in a first pulse pattern and a second clock signal at a second frequency in a second pulse pattern are configured, wherein the pulse patterns have a phase difference. The transmit side of the channels each encode their received clock pulse pattern, then modulate with a carrier frequency to provide a fc1 and a fc2 signal, respectively. The receive side of the channels demodulate received signals during a rising or falling edge of their clock signal to generate a delayed received version of the first and second clock pulse pattern. Missing pulses are identified by comparing the delayed received clock pulse patterns to their clock pulse patterns.
    Type: Application
    Filed: March 7, 2018
    Publication date: September 12, 2019
    Inventors: ATUL SINGH, KUMAR ANURAG SHRIVASTAVA
  • Publication number: 20180226920
    Abstract: Apparatus for communication across a capacitively coupled channel are disclosed herein. An example circuit includes a first plate substantially parallel to a substrate, thereby forming a first capacitance intermediate the first plate and the substrate. A second plate is substantially parallel to the substrate and the first plate, the first plate intermediate the substrate and the second plate. A third plate is substantially parallel to the substrate, thereby forming a second capacitance intermediate the third plate and the substrate. A fourth plate is substantially parallel to the substrate and the third plate, the third plate intermediate the substrate and the fourth plate. An inductor is connected to the first plate and the third plate, the inductor to, in combination with the first capacitance and the second capacitance, form an LC amplifier.
    Type: Application
    Filed: February 8, 2017
    Publication date: August 9, 2018
    Inventors: Subhashish Mukherjee, Kumar Anurag Shrivastava, Sreeram Subramanyam Nasum
  • Publication number: 20180204437
    Abstract: A method and a system for providing alerts at a computing device are provided. The method as executed by the system includes determining usage of the computing device based on a user interaction. Ascertaining whether the user is exhibiting a foot movement. Displaying an overlay of a predetermined size for a predetermined amount of time to cause an alert, in response to the ascertainment and the determination. Incrementing a size of the displayed overlay linearly with time, based on persistence of the usage and said exhibition of the foot movement beyond an extended time duration.
    Type: Application
    Filed: January 17, 2018
    Publication date: July 19, 2018
    Inventors: Amitoj SINGH, Varad ARYA, Arun PRABHAKAR, Govind JANARDHANAN, Ishani GHOSH, Pooja PAWWAR, Ekta Anil Pradeep SACHDEV, Ridhima JAISWAL, Anupam BHARDWAJ, Manoj KUMAR, Ritesh SINHA, Kumar Anurag SINGH, Manish KUMAR, Naresh Kumar GUPTA, Santosh Pallav SAHU, Tasleem ARIF, Vipin TIWARI, Vivek KUMAR
  • Publication number: 20180191331
    Abstract: A circuit includes an amplifier having an input that receives an alternating current (AC) waveform and an output that is coupled to a power source via a bias resistor. A bulk acoustic wave (BAW) resonator is coupled in parallel to the bias resistor via the power source and the amplifier output. The BAW resonator and the amplifier output forms a band pass filter to filter the AC waveform received at the amplifier input and to provide a filtered AC waveform at the amplifier output.
    Type: Application
    Filed: December 30, 2016
    Publication date: July 5, 2018
    Inventors: KUMAR ANURAG SHRIVASTAVA, SUBHASHISH MUKHERJEE, MADHULATHA BONU
  • Patent number: 10014844
    Abstract: A circuit includes an amplifier having an input that receives an alternating current (AC) waveform and an output that is coupled to a power source via a bias resistor. A bulk acoustic wave (BAW) resonator is coupled in parallel to the bias resistor via the power source and the amplifier output. The BAW resonator and the amplifier output forms a band pass filter to filter the AC waveform received at the amplifier input and to provide a filtered AC waveform at the amplifier output.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: July 3, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Kumar Anurag Shrivastava, Subhashish Mukherjee, Madhulatha Bonu
  • Publication number: 20180131545
    Abstract: Methods and apparatus for performing a high speed phase demodulation scheme using a low bandwidth phase-lock loop are disclosed. An example apparatus includes a low bandwidth phase lock loop to lock to a data signal at a first phase, the data signal capable of oscillating at the first phase or a second phase; and output a first output signal at the first phase and a second output signal at the second phase, the first output signal or the second output signal being utilized in a feedback loop of the low bandwidth phase lock loop. The example apparatus further includes a fast phase change detection circuit coupled to the low bandwidth phase lock loop to determine whether the data signal is oscillating at the first phase or the second phase.
    Type: Application
    Filed: January 3, 2018
    Publication date: May 10, 2018
    Inventors: Subhashish Mukherjee, Abhijit Anant Patki, Madhulatha Bonu, Kumar Anurag Shrivastava
  • Patent number: 9893916
    Abstract: Methods and apparatus for performing a high speed phase demodulation scheme using a low bandwidth phase-lock loop are disclosed. An example apparatus includes a low bandwidth phase lock loop to lock to a data signal at a first phase, the data signal capable of oscillating at the first phase or a second phase; and output a first output signal at the first phase and a second output signal at the second phase, the first output signal or the second output signal being utilized in a feedback loop of the low bandwidth phase lock loop.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: February 13, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Subhashish Mukherjee, Abhijit Anant Patki, Madhulatha Bonu, Kumar Anurag Shrivastava
  • Publication number: 20180006856
    Abstract: Methods and apparatus for performing a high speed phase demodulation scheme using a low bandwidth phase-lock loop are disclosed. An example apparatus includes a low bandwidth phase lock loop to lock to a data signal at a first phase, the data signal capable of oscillating at the first phase or a second phase; and output a first output signal at the first phase and a second output signal at the second phase, the first output signal or the second output signal being utilized in a feedback loop of the low bandwidth phase lock loop.
    Type: Application
    Filed: July 1, 2016
    Publication date: January 4, 2018
    Inventors: Subhashish Mukherjee, Abhijit Anant Patki, Madhulatha Bonu, Kumar Anurag Shrivastava
  • Publication number: 20170353157
    Abstract: Methods and apparatus are disclosed to generate an oscillating output signal having a voltage swing greater than a voltage swing across nodes of active devices. An example oscillator includes a tank to generate an oscillating output signal in response receiving an edge of an enable signal; a feedback generator including a first gain stage forming a first feedback loop with the tank, the first feedback loop providing a first charge to maintain the oscillating output signal and a second gain stage forming a second feedback loop with the tank, the second feedback loop providing a second charge to maintain the oscillating output signal, the first and second charges combining with the oscillating output signal to generate a high voltage swing; and an attenuator connected between the tank and the feedback generator to isolate the tank from active components of the feedback generator.
    Type: Application
    Filed: June 3, 2016
    Publication date: December 7, 2017
    Inventors: Subhashish Mukherjee, Kumar Anurag Shrivastava, Madhulatha Bonu
  • Patent number: 9634736
    Abstract: In described examples, a method of inductive coupled communications includes providing a first resonant tank (first tank) and a second resonant tank (second tank) tuned to essentially the same resonant frequency, each having antenna coils and switches positioned for changing a Q and a bandwidth of their tank. The antenna coils are separated by a distance that provides near-field communications. The first tank is driven to for generating induced oscillations to transmit a predetermined number of carrier frequency cycles providing data. After the predetermined number of cycles, a switch is activated for widening the bandwidth of the first tank. Responsive to the oscillations in the first tank, the second tank begins induced oscillations. Upon detecting a bit associated with the induced oscillations, a switch is activated for widening the bandwidth of the second tank and a receiver circuit receiving an output of the second tank is reset.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: April 25, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Subhashish Mukherjee, Anoop Bhat, Kumar Anurag Shrivastava
  • Patent number: 9601995
    Abstract: A low power radio frequency envelope detector includes a charging transistor for controlling the charge supplied to an output capacitor. A first input capacitor couples an input signal to a gate of the charging transistor. A second input capacitor couples a first polarity of the input signal to a first diode such that the first diode is operable to couple charge to the first input capacitor and to the gate of the charging transistor in response to a positive excursion of the first polarity of the input signal. A third input capacitor couples a second polarity of the input signal to a second diode coupled in series with the first diode. The first and second diodes are operable to couple charge to the first input capacitor and to the gate of the charging transistor in response to a positive excursion of the first polarity of the input signal.
    Type: Grant
    Filed: May 3, 2016
    Date of Patent: March 21, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Subhashish Mukherjee, Kumar Anurag Shrivastava
  • Publication number: 20160315670
    Abstract: In described examples, a method of inductive coupled communications includes providing a first resonant tank (first tank) and a second resonant tank (second tank) tuned to essentially the same resonant frequency, each having antenna coils and switches positioned for changing a Q and a bandwidth of their tank. The antenna coils are separated by a distance that provides near-field communications. The first tank is driven to for generating induced oscillations to transmit a predetermined number of carrier frequency cycles providing data. After the predetermined number of cycles, a switch is activated for widening the bandwidth of the first tank. Responsive to the oscillations in the first tank, the second tank begins induced oscillations. Upon detecting a bit associated with the induced oscillations, a switch is activated for widening the bandwidth of the second tank and a receiver circuit receiving an output of the second tank is reset.
    Type: Application
    Filed: June 30, 2016
    Publication date: October 27, 2016
    Inventors: Subhashish Mukherjee, Anoop Bhat, Kumar Anurag Shrivastava
  • Patent number: 9385790
    Abstract: A method of inductive coupled communications includes providing a first resonant tank (first tank) and a second resonant tank (second tank) tuned to essentially the same resonant frequency, each having antenna coils and switches positioned for changing a Q and a bandwidth of their tank. The antenna coils are separated by a distance that provides near-field communications. The first tank is driven to for generating induced oscillations to transmit a predetermined number of carrier frequency cycles providing data. After the predetermined number of cycles, a switch is activated for widening the bandwidth of the first tank. Responsive to the oscillations in the first tank, the second tank begins induced oscillations. Upon detecting a bit associated with the induced oscillations, a switch is activated for widening the bandwidth of the second tank and a receiver circuit receiving an output of the second tank is reset.
    Type: Grant
    Filed: December 31, 2014
    Date of Patent: July 5, 2016
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Subhashish Mukherjee, Anoop Bhat, Kumar Anurag Shrivastava
  • Publication number: 20160191123
    Abstract: A method of inductive coupled communications includes providing a first resonant tank (first tank) and a second resonant tank (second tank) tuned to essentially the same resonant frequency, each having antenna coils and switches positioned for changing a Q and a bandwidth of their tank. The antenna coils are separated by a distance that provides near-field communications. The first tank is driven to for generating induced oscillations to transmit a predetermined number of carrier frequency cycles providing data. After the predetermined number of cycles, a switch is activated for widening the bandwidth of the first tank. Responsive to the oscillations in the first tank, the second tank begins induced oscillations. Upon detecting a bit associated with the induced oscillations, a switch is activated for widening the bandwidth of the second tank and a receiver circuit receiving an output of the second tank is reset.
    Type: Application
    Filed: December 31, 2014
    Publication date: June 30, 2016
    Inventors: SUBHASHISH MUKHERJEE, ANOOP BHAT, KUMAR ANURAG SHRIVASTAVA
  • Publication number: 20110249557
    Abstract: The present invention is an implementation of a network device called Wireless Manager (WiM) a centralized controller for QoS management of infrastructure WLANs based on the IEEE 802.11 DCF standards. The WiM queues and schedules packets from all the traffic flowing between the Access Points (APs) and the wireline LAN which requires no changes to the AP or the STAs, and can be viewed as implementing a Split-MAC architecture. The objectives of WiM are to manage various TCP performance related issues such as the throughput anomaly when STAs associate with an AP with mixed PHY rates, and upload download unfairness induced by finite AP buffers, and also to serve as the controller for VoIP admission control and handovers, and for other QoS management measures.
    Type: Application
    Filed: November 12, 2009
    Publication date: October 13, 2011
    Applicants: Indian Institute of Science, Department of Information Technology
    Inventors: Hedge Malati, Kumar Pavan, K.R. Vasudev, S.V.R. Anand, Kumar Anurag, Kuri Joy