Patents by Inventor Lloyd Paul Matthews

Lloyd Paul Matthews 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).

  • Data processing system having an auto-ranging low voltage detection circuit
    Patent number: 5894423
    Abstract: A Voltage Range Detection Circuit (VRDC) (8) determines the supply voltage range of the integrated circuit. In general, voltage detector (10) determines the voltage level of supply voltage V.sub.DD and stores the result of this determination in storage (12). Resistor network (14), which receives the stored result, configures itself in the proper resistor configuration for the determined supplied voltage such that a compare signal is generated that represents a Variable Low Voltage Detection (VLVD) switch point. Resistor network (14) outputs this generated VLVD switch point signal to a first input of comparator (18) to be compared with the constant level reference voltage output by voltage reference (16) at a second input of comparator (18). When the output of resistor network (14) drops below the reference voltage provided by voltage reference (16), comparator (18) outputs a reset signal to disable the chip because a low voltage condition has occurred.
    Type: Grant
    Filed: December 26, 1996
    Date of Patent: April 13, 1999
    Assignee: Motorola Inc.
    Inventors: David Ling, Lloyd Paul Matthews, Thomas Lovell Portlock, Edward John Hathaway