Patents by Inventor Julie STULZ

Julie STULZ 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).

  • Audio switch circuit with slow turn-on
    Patent number: 9877104
    Abstract: An audio switch circuit includes negative feedback paths and a transistor that serves as a switching component. The negative feedback paths are turned ON to couple a source voltage and a drain voltage of the transistor to the gate of the transistor when the audio switch circuit is turned ON. The negative feedback paths reduce the slew rate of the gate-to-source voltage of the transistor, thereby slowing the turn-ON of the audio switch circuit to prevent or minimize unwanted audible noise. The negative feedback paths can be turned OFF after a period of time after the audio switch circuit is turned ON for improved total harmonic distortion.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: January 23, 2018
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Lei Huang, Julie Stulz, Eric Li
  • AUDIO SWITCH CIRCUIT WITH SLOW TURN-ON
    Publication number: 20160182040
    Abstract: An audio switch circuit includes negative feedback paths and a transistor that serves as a switching component. The negative feedback paths are turned ON to couple a source voltage and a drain voltage of the transistor to the gate of the transistor when the audio switch circuit is turned ON. The negative feedback paths reduce the slew rate of the gate-to-source voltage of the transistor, thereby slowing the turn-ON of the audio switch circuit to prevent or minimize unwanted audible noise. The negative feedback paths can be turned OFF after a period of time after the audio switch circuit is turned ON for improved total harmonic distortion.
    Type: Application
    Filed: June 23, 2015
    Publication date: June 23, 2016
    Applicant: Fairchild Semiconductor Corporation
    Inventors: Lei HUANG, Julie STULZ, Eric LI