Patents by Inventor Rajeeva Gopala Krishna

Rajeeva Gopala Krishna 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: 11442800
    Abstract: A windowed watchdog circuit system can include a slow timer module configured to receive watchdog strobe signals from a processor and to determine whether a gap time between watchdog strobe signals is longer than a slow threshold time to output a slow threshold state when the gap time is longer than the slow threshold. The windowed watchdog circuit system can include a fast timer system configured to receive the watchdog strobe signals from the processor and to determine whether the gap time between watchdog strobe signals is shorter than a fast threshold time to output a fast threshold state when the gap time is shorted than the fast threshold. The windowed watchdog circuit system can be configured to output a reset state to reset the processor when any of the slow timer module and the fast timer system are outputting the slow threshold state or the fast threshold state, respectively.
    Type: Grant
    Filed: August 5, 2020
    Date of Patent: September 13, 2022
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Rajeeva Gopala Krishna, Shihab T. A. Muhammed
  • Patent number: 11416663
    Abstract: A system for controlling a motor with a plurality of motor control functions including at least a current control loop and a velocity control loop. The system includes one of a hybrid Digital Signal Processor (DSP)-Field Programmable Gate Array (FPGA) architecture having an integral DSP and an integral FPGA or a System on a Chip (SoC) architecture having a Microcontroller Sub-System (MSS) and an FPGA fabric. The current control loop function is assigned to the integral FPGA for the hybrid DSP-FPGA architecture, and at least the velocity control loop function is assigned to the DSP the hybrid DSP-FPGA architecture. Alternatively, the current control loop function is assigned the FPGA fabric of the SoC architecture, and at least the velocity control loop function is assigned to the MSS of the SoC architecture.
    Type: Grant
    Filed: December 11, 2019
    Date of Patent: August 16, 2022
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Ashish Vijay, Sesh Mohan Rao, Rajeeva Gopala Krishna, Shardul Shrinivas Bapat, Rajagopal Srinivasan, Manish Kumar
  • Publication number: 20210294612
    Abstract: A windowed watchdog circuit system can include a slow timer module configured to receive watchdog strobe signals from a processor and to determine whether a gap time between watchdog strobe signals is longer than a slow threshold time to output a slow threshold state when the gap time is longer than the slow threshold. The windowed watchdog circuit system can include a fast timer system configured to receive the watchdog strobe signals from the processor and to determine whether the gap time between watchdog strobe signals is shorter than a fast threshold time to output a fast threshold state when the gap time is shorted than the fast threshold. The windowed watchdog circuit system can be configured to output a reset state to reset the processor when any of the slow timer module and the fast timer system are outputting the slow threshold state or the fast threshold state, respectively.
    Type: Application
    Filed: August 5, 2020
    Publication date: September 23, 2021
    Applicant: Hamilton Sundstrand Corporation
    Inventors: Rajeeva Gopala Krishna, Shihab T. A. Muhammed
  • Patent number: 10928446
    Abstract: A method of performing a built in test on a watchdog circuit including a watchdog timer includes: initiating the built in test with a processor being monitored by the watchdog circuit, wherein initiating includes enabling a watchdog circuit built in test reset inhibit circuit (WD BIT reset inhibit circuit) connected between an output of an active watchdog integrated reset circuit connected to the processor and a reset input of the processor; and ceasing to provide a strobe signal to the active watchdog integrated reset circuit that resets a watchdog counter in the active watchdog integrated reset circuit, the active watchdog integrated reset circuit causing a reset of the processor via its output when the watchdog counter expires by providing a signal to a reset input of the processor.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: February 23, 2021
    Assignee: HAMILTON SUNSTRAND CORPORATION
    Inventors: Rajeeva Gopala Krishna, Ashish Vijay, Sesh Mohan Rao
  • Publication number: 20200225285
    Abstract: A method of performing a built in test on a watchdog circuit including a watchdog timer includes: initiating the built in test with a processor being monitored by the watchdog circuit, wherein initiating includes enabling a watchdog circuit built in test reset inhibit circuit (WD BIT reset inhibit circuit) connected between an output of an active watchdog integrated reset circuit connected to the processor and a reset input of the processor; and ceasing to provide a strobe signal to the active watchdog integrated reset circuit that resets a watchdog counter in the active watchdog integrated reset circuit, the active watchdog integrated reset circuit causing a reset of the processor via its output when the watchdog counter expires by providing a signal to a reset input of the processor.
    Type: Application
    Filed: January 30, 2019
    Publication date: July 16, 2020
    Inventors: Rajeeva Gopala KRISHNA, Ashish VIJAY, Sesh Mohan RAO
  • Publication number: 20200193078
    Abstract: A system for controlling a motor with a plurality of motor control functions including at least a current control loop and a velocity control loop. The system includes one of a hybrid Digital Signal Processor (DSP)-Field Programmable Gate Array (FPGA) architecture having an integral DSP and an integral FPGA or a System on a Chip (SoC) architecture having a Microcontroller Sub-System (MSS) and an FPGA fabric. The current control loop function is assigned to the integral FPGA for the hybrid DSP-FPGA architecture, and at least the velocity control loop function is assigned to the DSP the hybrid DSP-FPGA architecture. Alternatively, the current control loop function is assigned the FPGA fabric of the SoC architecture, and at least the velocity control loop function is assigned to the MSS of the SoC architecture.
    Type: Application
    Filed: December 11, 2019
    Publication date: June 18, 2020
    Inventors: Ashish Vijay, Sesh Mohan Rao, Rajeeva Gopala Krishna, Shardul Shrinivas Bapat, Rajagopal Srinivasan, Manish Kumar
  • Publication number: 20190370016
    Abstract: Embodiments of the invention include methods, systems and devices for implementing the auto detection of Joint Test Action Group (JTAG) debuggers/emulators. Embodiments include sending a reset signal to reset one or more slave devices, and detecting a programming signal indicating the one or more slave devices are in a programming/debugging mode. Embodiments also include responsive to the signal, inhibiting resetting one or more slave devices receiving the programming signal.
    Type: Application
    Filed: July 26, 2018
    Publication date: December 5, 2019
    Inventors: Rajeeva Gopala Krishna, Sesh Mohan Rao