Patents by Inventor Thomas Marinus Frederiksen

Thomas Marinus Frederiksen 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).

  • Circuit utilizing open-base transistor as leakage bypass device
    Patent number: 4011470
    Abstract: A floating base transistor connected within an integrated circuit to provide a high temperature high voltage low current bypass device having the same type of temperature dependence as the leakage current shunted therethrough. The bypass device is connected to provide its I.sub.CEO current as a current source through which a parasitic leakage current is diverted which would otherwise produce a base current of an output transistor which is supposed to be in the off condition. The parasitic leakage current includes the I.sub.CEO current of an opposite polarity driving transistor in the off condition having its emitter connected to a power supply and its base connected to an input circuit and its collector connected to the base of the output transistor. In one embodiment the floating base transistor is a PNP substrate transistor having its collector connected to ground, its emitter connected to the base of an NPN output transistor, and its base floating.
    Type: Grant
    Filed: March 25, 1976
    Date of Patent: March 8, 1977
    Assignee: Motorola, Inc.
    Inventors: William Folsom Davis, Thomas Marinus Frederiksen