Patents by Inventor Ivan LU

Ivan LU 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).

  • Customizable ramp-up and ramp-down amplitude profiles for a digital power amplifier (DPA) based transmitter
    Patent number: 9923529
    Abstract: Apparatuses, systems, and methods for a digital power amplifier (DPA) to generate a monotonic and linear ramp-up and ramp-down for a time division multiple access (TDMA) slot transmission are described. In one aspect, a monotonic and linear amplitude-to-control input code relationship model is generated for the DPA and stored. When the DPA needs to generate a ramp-up or ramp-down, the stored monotonic and linear amplitude-to-control input code relationship model is used to shape the input control code before it is input into the DPA. A new monotonic and linear amplitude-to-control input code relationship model may be generated and stored if the operating conditions change. The apparatuses, systems, and methods described herein may be applied to a multi-standard broadband modem chip capable of 2G transmission.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: March 20, 2018
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Siddharth Seth, Venumadhav Bhagavatula, Ivan Lu, Sang Won Son
  • CUSTOMIZABLE RAMP-UP AND RAMP-DOWN AMPLITUDE PROFILES FOR A DIGITAL POWER AMPLIFIER (DPA) BASED TRANSMITTER
    Publication number: 20170222607
    Abstract: Apparatuses, systems, and methods for a digital power amplifier (DPA) to generate a monotonic and linear ramp-up and ramp-down for a time division multiple access (TDMA) slot transmission are described. In one aspect, a monotonic and linear amplitude-to-control input code relationship model is generated for the DPA and stored. When the DPA needs to generate a ramp-up or ramp-down, the stored monotonic and linear amplitude-to-control input code relationship model is used to shape the input control code before it is input into the DPA. A new monotonic and linear amplitude-to-control input code relationship model may be generated and stored if the operating conditions change. The apparatuses, systems, and methods described herein may be applied to a multi-standard broadband modem chip capable of 2G transmission.
    Type: Application
    Filed: April 25, 2016
    Publication date: August 3, 2017
    Inventors: Siddharth SETH, Venumadhav BHAGAVATULA, Ivan LU, Sang Won SON