Patents by Inventor Roberto Aparico Joo

Roberto Aparico Joo 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).

  • System and method for power amplifier output power control
    Patent number: 7733176
    Abstract: A system for controlling amplifier power is provided. The system includes a voltage envelope detector that receives a voltage signal and generates a voltage envelope signal. A current envelope detector receives a current signal and generates a current envelope signal. A power amplifier level controller receives the greater of the voltage envelope signal and the current envelope signal, such as by connecting the output of the voltage envelope detector and the current envelope detector at a common point and conducting the high frequency current components to ground via a capacitor. A power amplifier level control signal is then generated based on the voltage drop across the capacitor.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: June 8, 2010
    Assignees: Infineon Technologies AG, Axiom Microdevices, Inc.
    Inventors: Rahul Magoon, Ichiro Aoki, John Lyu, Scott Kee, Roberto Aparico Joo, Winfried Bakalski, Thomas Bruder
  • System and method for power amplifier output power control
    Patent number: 7486137
    Abstract: An architecture for detecting amplifier power is provided. The architecture includes a voltage envelope detector that receives a voltage signal and generates a voltage envelope signal. A current envelope detector receives a current signal and generates a current envelope signal. A power amplifier level controller receives the greater of the voltage envelope signal and the current envelope signal, such as by connecting the output of the voltage envelope detector and the current envelope detector at a common point and conducting the high frequency current components to ground via a capacitor. A power amplifier level control signal is then generated based on the voltage drop across the capacitor.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: February 3, 2009
    Assignee: Axiom Microdevices, Inc.
    Inventors: Rahul Magoon, Ichiro Aoki, John Lyu, Scott Kee, Roberto Aparico Joo