Patents by Inventor Nancy Schaefer

Nancy Schaefer 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).

  • High loop-gain pHEMT regulator for linear RF power amplifier
    Patent number: 9912296
    Abstract: Voltage regulator circuitry includes a first gain stage, a second gain stage, and a feedback stage. Feedback is provided between the feedback stage, the second gain stage, and the first gain stage in order to tightly regulate an output voltage of the voltage regulator circuitry such that the output voltage is independent of process variations present in the devices therein. The voltage regulator circuitry is fabricated using a pseudomorphic high electron mobility transistor (pHEMT) process in order to reduce the size thereof and provide short turn-on times and low quiescent current.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: March 6, 2018
    Assignee: Qorvo US, Inc.
    Inventors: Peng Cheng, Swaminathan Muthukrishnan, David Antopolsky, Jeremiah J. Smith, Nancy Schaefer, Randy Naylor
  • HIGH LOOP-GAIN PHEMT REGULATOR FOR LINEAR RF POWER AMPLIFIER
    Publication number: 20180054167
    Abstract: Voltage regulator circuitry includes a first gain stage, a second gain stage, and a feedback stage. Feedback is provided between the feedback stage, the second gain stage, and the first gain stage in order to tightly regulate an output voltage of the voltage regulator circuitry such that the output voltage is independent of process variations present in the devices therein. The voltage regulator circuitry is fabricated using a pseudomorphic high electron mobility transistor (pHEMT) process in order to reduce the size thereof and provide short turn-on times and low quiescent current.
    Type: Application
    Filed: May 22, 2017
    Publication date: February 22, 2018
    Inventors: Peng Cheng, Swaminathan Muthukrishnan, David Antopolsky, Jeremiah J. Smith, Nancy Schaefer, Randy Naylor