Patents by Inventor Sagar Ray

Sagar Ray 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: 20190132163
    Abstract: A circuit and method in an amplifier circuit for filtering a DC offset in differential input signals and inserting a programmable adjustable crosspoint offset in differential output signals. An amplifier circuit includes a differential amplifier circuit configured to amplify differential input signals into differential output signal. The amplifier circuit further includes a feedback circuit coupled between the differential output signals and the differential input signals. The feedback circuit is configured to generate a programmably adjustable crosspoint offset in the differential output signal and a programmably adjustable cutoff frequency of the feedback circuit. An amplifier method includes amplifying differential input signals into differential output signals, generating a programmably adjustable crosspoint offset in the differential output signal, and generating a programmably adjustable cutoff frequency of a feedback circuit between the differential output signals and the differential input signals.
    Type: Application
    Filed: October 24, 2018
    Publication date: May 2, 2019
    Inventor: Sagar Ray
  • Publication number: 20190123726
    Abstract: A differential signal offset adjustment circuit may include a first circuit for receiving a first one of a differential input signal and generating a first one of a differential output signal with positive offset based on a differential offset signal. The circuit may further include a second circuit for receiving a second one of a differential input signal and generating a second one of a differential output signal with a negative offset based on the differential offset signal.
    Type: Application
    Filed: November 5, 2018
    Publication date: April 25, 2019
    Inventors: Sagar Ray, Arash Izadi
  • Publication number: 20190036601
    Abstract: A loss of signal (LOS) detector may include a comparator including a first input, a second input and an output indicating a LOS status. The LOS detector further includes circuitry to compare a first signal on the first input generated by differential input signals and a threshold signal common mode with a second signal on the second input generated by differential threshold signals at a first level and an input signal common mode. The circuit further configured to generate a LOS indicator on the output based on the compare.
    Type: Application
    Filed: October 2, 2018
    Publication date: January 31, 2019
    Inventor: Sagar Ray
  • Patent number: 10153753
    Abstract: A driver circuit includes a differential driver and a duty cycle correction circuit. The differential driver includes differential inputs to receive a differential input signal and a first common mode input to receive a first input common mode voltage and a first differential output to output a first differential output voltage with a first output common mode voltage. The duty cycle correction circuit includes a first tunable voltage reference and a first comparison circuitry configured to generate the first input common mode voltage based on reducing a difference determined by the first comparison circuitry between a first reference voltage generated by the first tunable voltage reference and the first output common mode voltage at the first differential output of the first differential driver.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: December 11, 2018
    Assignee: Finisar Corporation
    Inventors: Sagar Ray, The'Lihn Nguyen
  • Patent number: 10122353
    Abstract: A differential signal offset adjustment circuit may include a first circuit for receiving a first one of a differential input signal and generating a first one of a differential output signal with positive offset based on a differential offset signal. The circuit may further include a second circuit for receiving a second one of a differential input signal and generating a second one of a differential output signal with a negative offset based on the differential offset signal.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: November 6, 2018
    Assignee: Finisar Corporation
    Inventors: Sagar Ray, Arash Izadi
  • Patent number: 10090922
    Abstract: A loss of signal (LOS) detector may include a comparator including a first input, a second input and an output indicating a LOS status. The LOS detector further includes circuitry to compare a first signal on the first input generated by differential input signals and a threshold signal common mode with a second signal on the second input generated by differential threshold signals at a first level and an input signal common mode. The circuit further configured to generate a LOS indicator on the output based on the compare.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: October 2, 2018
    Assignee: Finisar Corporation
    Inventor: Sagar Ray
  • Publication number: 20180219534
    Abstract: A driver circuit includes a differential driver and a duty cycle correction circuit. The differential driver includes differential inputs to receive a differential input signal and a first common mode input to receive a first input common mode voltage and a first differential output to output a first differential output voltage with a first output common mode voltage. The duty cycle correction circuit includes a first tunable voltage reference and a first comparison circuitry configured to generate the first input common mode voltage based on reducing a difference determined by the first comparison circuitry between a first reference voltage generated by the first tunable voltage reference and the first output common mode voltage at the first differential output of the first differential driver.
    Type: Application
    Filed: February 2, 2018
    Publication date: August 2, 2018
    Inventors: Sagar Ray, The'Lihn NGUYEN
  • Publication number: 20180076800
    Abstract: A differential signal offset adjustment circuit may include a first circuit for receiving a first one of a differential input signal and generating a first one of a differential output signal with positive offset based on a differential offset signal. The circuit may further include a second circuit for receiving a second one of a differential input signal and generating a second one of a differential output signal with a negative offset based on the differential offset signal.
    Type: Application
    Filed: September 8, 2017
    Publication date: March 15, 2018
    Inventors: Sagar Ray, Arash Izadi
  • Publication number: 20180026717
    Abstract: A loss of signal (LOS) detector may include a comparator including a first input, a second input and an output indicating a LOS status. The LOS detector further includes circuitry to compare a first signal on the first input generated by differential input signals and a threshold signal common mode with a second signal on the second input generated by differential threshold signals at a first level and an input signal common mode. The circuit further configured to generate a LOS indicator on the output based on the compare.
    Type: Application
    Filed: July 13, 2017
    Publication date: January 25, 2018
    Inventor: Sagar Ray