Patents by Inventor Richard Alan Dunipace

Richard Alan Dunipace 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).

  • Proportional bias switch driver circuit
    Patent number: 8947896
    Abstract: A switch bias system is provided that includes a bipolar junction transistor (BJT) switch comprising a base, emitter, and collector; a current sense circuit coupled to the emitter, the current sense circuit configured to sense current flow through the emitter of the BJT switch; and a proportional bias circuit configured to generate a bias current to the base of the BJT switch, the bias current set to a fixed proportion of the sensed current flow through the emitter of the BJT switch.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: February 3, 2015
    Assignee: Fairchild Semiconductor Corporation
    Inventor: Richard Alan Dunipace
  • SiC Proportional Bias Switch Driver Circuit with Current Transformer
    Publication number: 20140035627
    Abstract: A switch bias system is provided that includes a silicon on carbide (SiC) bipolar junction transistor (BJT) switch comprising a base, emitter, and collector; an energy storage circuit coupled to the collector of the SiC BJT switch, the energy storage circuit supplying current flow to the collector of the SiC BJT switch; a current transformer circuit coupled to the emitter, the current transformer circuit configured to sense current flow through the emitter of the SiC BJT switch; and a proportional bias circuit configured to generate a bias current to the base of the SiC BJT switch, the bias current set to a proportion of the sensed current flow through the emitter of the SiC BJT switch.
    Type: Application
    Filed: January 31, 2013
    Publication date: February 6, 2014
    Applicant: FAIRCHILD SEMICONDUCTOR CORPORATION
    Inventor: Richard Alan Dunipace
  • PROPORTIONAL BIAS SWITCH DRIVER CIRCUIT
    Publication number: 20130088902
    Abstract: A switch bias system is provided that includes a bipolar junction transistor (BJT) switch comprising a base, emitter, and collector; a current sense circuit coupled to the emitter, the current sense circuit configured to sense current flow through the emitter of the BJT switch; and a proportional bias circuit configured to generate a bias current to the base of the BJT switch, the bias current set to a fixed proportion of the sensed current flow through the emitter of the BJT switch.
    Type: Application
    Filed: October 11, 2011
    Publication date: April 11, 2013
    Inventor: Richard Alan Dunipace