Patents by Inventor KARTHIK S

KARTHIK S 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: 9641313
    Abstract: The present invention relates generally to integrated circuits. More particularly, the present invention provides a circuit and method for regulating a voltage for a high speed serializer/deserializer (SerDes) device. But it will be recognized that the technique can be used for regulating memory devices (e.g., DDR 4 SDRAM devices, DDR4 register devices, DDR4 controller devices), and other high speed data applications. In various embodiments, phase-interpolator is implemented in conjunction with a delay-lock loop (DLL) and an SR latch, where one or more outputs of the DLL is used by the SR latch. Additionally, such techniques can be used for a variety of applications such as network and/or computer storage systems, computer servers, hand held computing devices, portable computing devices, computer systems, network appliances and/or switches, routers, and gateways, and the like.
    Type: Grant
    Filed: August 13, 2015
    Date of Patent: May 2, 2017
    Assignee: INPHI CORPORATION
    Inventors: Karthik S. Gopalakrishnan, Guojun Ren, Parmanand Mishra
  • Patent number: 9587992
    Abstract: The present invention relates to integrated circuits. More specifically, embodiments of the present invention provide methods and systems for determining temperatures of an integrated circuit using an one-point calibration technique, where temperature is determined by a single temperature measurement and calculation using known electrical characteristics of the integrated circuit.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: March 7, 2017
    Assignee: INPHI CORPORATION
    Inventors: Sadettin Cirit, Karthik S. Gopalakrishnan
  • Publication number: 20170033799
    Abstract: The present invention is directed to signal processing system and electrical circuits. According to various embodiments, a DLL system includes a delay line provides multiple output signals associated with different clock phases. The delay line may be adjusted using a pair of bias voltages. A phase detector systems generates the bias voltages using the multiple output signals from the delay line. The multiple output signals include signals associated with the first phase, the last phase, and two adjacent phases. There are other embodiments as well.
    Type: Application
    Filed: August 12, 2016
    Publication date: February 2, 2017
    Inventors: Guojun REN, James GORECKI, Karthik S. GOPALAKRISHNAN
  • Patent number: 9559880
    Abstract: The present invention is directed to communication systems. More specifically, embodiments of the present invention provide a technique and system thereof for performing eye modulation. Eye modulation is performed at the transmission side of a PAM communication system to compensate for distortion and non-linearity and generate an output waveform. Spacing among eye levels is adjusted by performing symmetric modulation using ? parameter and asymmetric modulation using ? parameter. A correction module measures the output waveform and sends feedback signals to a control module to adjust the ? parameter and the ? parameter. There are other embodiments as well.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: January 31, 2017
    Assignee: INPHI CORPORATION
    Inventors: Halil Cirit, Karthik S. Gopalakrishnan
  • Patent number: 9509560
    Abstract: Various embodiments of systems and methods for unified configuration for cloud integration are described herein. In an aspect, the method includes rendering a unified configuration interface within a cloud application for performing cloud integration. The unified configuration interface includes a first widget to configure an external system for integration with the cloud application and a second widget to configure an integration flow (iflow) between the external system and the cloud application. The iflow defines data flow between the configured external system and the cloud application. Subsequent to receiving a confirmation of the selected iflow, integrating the external system with the cloud application to share data in the cloud.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: November 29, 2016
    Assignee: SAP SE
    Inventors: Hongyu Chen, Karthik S J
  • Patent number: 9438255
    Abstract: The present invention is directed to signal processing system and electrical circuits. According to various embodiments, a DLL system includes a delay line provides multiple output signals associated with different clock phases. The delay line may be adjusted using a pair of bias voltages. A phase detector systems generates the bias voltages using the multiple output signals from the delay line. The multiple output signals include signals associated with the first phase, the last phase, and two adjacent phases. There are other embodiments as well.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: September 6, 2016
    Assignee: INPHI CORPORATION
    Inventors: Guojun Ren, James Gorecki, Karthik S. Gopalakrishnan
  • Publication number: 20160103023
    Abstract: The present invention relates generally to integrated circuits. More particularly, the present invention provides a circuit and method for sensing a voltage and/or temperature from an integrated circuit device such as a Serializer/Deserializer (SerDes) integrated circuit device. But it will be recognized that the technique can be used for monitoring other system on chip devices, such as micro-controllers, digital signal processors, microprocessors, networking devices, application specific integrated circuits, and other integrated circuit devices that may desire on-chip temperature and/or voltage sensing capability.
    Type: Application
    Filed: November 11, 2015
    Publication date: April 14, 2016
    Inventors: Karthik S. GOPALAKRISHNAN, Sadettin CIRIT
  • Patent number: 9212952
    Abstract: The present invention relates generally to integrated circuits. More particularly, the present invention provides a circuit and method for sensing a voltage and/or temperature from an integrated circuit device such as a Serializer/Deserializer (SerDes) integrated circuit device. But it will be recognized that the technique can be used for monitoring other system on chip devices, such as micro-controllers, digital signal processors, microprocessors, networking devices, application specific integrated circuits, and other integrated circuit devices that may desire on-chip temperature and/or voltage sensing capability.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: December 15, 2015
    Assignee: INPHI CORPORATION
    Inventors: Karthik S. Gopalakrishnan, Sadettin Cirit
  • Patent number: 9203605
    Abstract: A phase interpolator (PI) is provided to adjust the phase of a clock such that the phase is aligned to an incoming data pattern from a data stream. The data can be captured from a device such as a flip-flop or the like. The present technique uses a PI (digital to phase) and a digital state machine in a feedback loop to set the correct digital code to the PI inputs to achieve an appropriate clock phase. Of course, there can be variations.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: December 1, 2015
    Assignee: INPHI CORPORATION
    Inventors: Karthik S. Gopalakrishnan, Guojun Ren
  • Patent number: 9178563
    Abstract: The voltage regulator device has a wide band amplifier having an input reference voltage, Vref and an input feedback voltage, Vfbk. The device has a source follower coupled to the wide band amplifier, the source follower coupled to an output of the wide band amplifier. The device has a VDD source, a regulator output, and a current source coupled to the source follower and the VDD source. The device has a low frequency path comprising a first transistor. The first transistor has a first gate, a first source, and a first drain. The first source is coupled to the VDD source. The first gate is coupled to a slow node, and the first drain is coupled to the regulator output. The low frequency path comprises a RC network, which has a capacitor, a resistor, and the slow node configured between the resistor and the capacitor. The device has a high frequency path comprising a second transistor. The second transistor has a second gate, a second source, and a second drain. The second source is coupled to the VDD source.
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: November 3, 2015
    Assignee: Inphi Corporation
    Inventors: Guojun Ren, Karthik S. Gopalakrishnan
  • Publication number: 20150280902
    Abstract: A phase interpolator (PI) is provided to adjust the phase of a clock such that the phase is aligned to an incoming data pattern from a data stream. The data can be captured from a device such as a flip-flop or the like. The present technique uses a PI (digital to phase) and a digital state machine in a feedback loop to set the correct digital code to the PI inputs to achieve an appropriate clock phase. Of course, there can be variations.
    Type: Application
    Filed: March 3, 2015
    Publication date: October 1, 2015
    Inventors: Karthik S. GOPALAKRISHNAN, Guojun REN
  • Patent number: 8995600
    Abstract: A phase interpolator (PI) is provided to adjust the phase of a clock such that the phase is aligned to an incoming data pattern from a data stream. The data can be captured from a device such as a flip-flop or the like. The present technique uses a PI (digital to phase) and a digital state machine in a feedback loop to set the correct digital code to the PI inputs to achieve an appropriate clock phase. Of course, there can be variations.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: March 31, 2015
    Assignee: INPHI Corporation
    Inventors: Karthik S. Gopalakrishnan, Guojun Ren
  • Publication number: 20150023398
    Abstract: The voltage regulator device has a wide band amplifier having an input reference voltage, Vref and an input feedback voltage, Vfbk. The device has a source follower coupled to the wide band amplifier, the source follower coupled to an output of the wide band amplifier. The device has a VDD source, a regulator output, and a current source coupled to the source follower and the VDD source. The device has a low frequency path comprising a first transistor. The first transistor has a first gate, a first source, and a first drain. The first source is coupled to the VDD source. The first gate is coupled to a slow node, and the first drain is coupled to the regulator output. The low frequency path comprises a RC network, which has a capacitor, a resistor, and the slow node configured between the resistor and the capacitor. The device has a high frequency path comprising a second transistor. The second transistor has a second gate, a second source, and a second drain. The second source is coupled to the VDD source.
    Type: Application
    Filed: October 7, 2014
    Publication date: January 22, 2015
    Inventors: Guojun REN, Karthik S. GOPALAKRISHNAN
  • Patent number: 8885691
    Abstract: The voltage regulator device has a wide band amplifier having an input reference voltage, Vref and an input feedback voltage, Vfbk. The device has a source follower coupled to the wide band amplifier, the source follower coupled to an output of the wide band amplifier. The device has a VDD source, a regulator output, and a current source coupled to the source follower and the VDD source. The device has a low frequency path comprising a first transistor. The first transistor has a first gate, a first source, and a first drain. The first source is coupled to the VDD source. The first gate is coupled to a slow node, and the first drain is coupled to the regulator output. The low frequency path comprises a RC network, which has a capacitor, a resistor, and the slow node configured between the resistor and the capacitor. The device has a high frequency path comprising a second transistor. The second transistor has a second gate, a second source, and a second drain. The second source is coupled to the VDD source.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: November 11, 2014
    Assignee: Inphi Corporation
    Inventors: Guojun Ren, Karthik S. Gopalakrishnan
  • Patent number: 8824616
    Abstract: In an example, the phase interpolator (PI) is provided to adjust the phase of a clock such that the phase is aligned to an incoming data pattern from a data stream. The data can be captured from a device such as a flip-flop or the like. The present technique uses a PI (digital to phase) and a digital state machine in a feedback loop to set the correct digital code to the PI inputs to achieve an appropriate clock phase. Of course, there can be variations.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: September 2, 2014
    Assignee: Inphi Corporation
    Inventor: Karthik S. Gopalakrishnan
  • Patent number: 8479218
    Abstract: Various embodiments of a system and method for automatically arranging or positioning objects in a block diagram of a graphical program are described. A graphical programming development environment or other software application may be operable to automatically analyze a block diagram of a graphical program, e.g., in order to determine objects present in the block diagram, as well as their initial positions within the block diagram. The graphical programming development environment may then automatically re-position various ones of the objects in the block diagram. In various embodiments, the objects may be re-positioned so as to better organize the block diagram or enable a user to more easily view or understand the block diagram.
    Type: Grant
    Filed: July 9, 2007
    Date of Patent: July 2, 2013
    Assignee: National Instruments Corporation
    Inventors: Anand Kodaganur, Arjun J. Singri, Ashwin Prasad, Karthik S. Murthy, Craig Smith, Bharath Dev
  • Publication number: 20090019453
    Abstract: Various embodiments of a system and method for automatically arranging or positioning objects in a block diagram of a graphical program are described. A graphical programming development environment or other software application may be operable to automatically analyze a block diagram of a graphical program, e.g., in order to determine objects present in the block diagram, as well as their initial positions within the block diagram. The graphical programming development environment may then automatically re-position various ones of the objects in the block diagram. In various embodiments, the objects may be re-positioned so as to better organize the block diagram or enable a user to more easily view or understand the block diagram.
    Type: Application
    Filed: July 9, 2007
    Publication date: January 15, 2009
    Inventors: Anand Kodaganur, Arjun J. Singri, Ashwin Prasad, Karthik S. Murthy