Patents by Inventor George Francis Clernon

George Francis Clernon 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).

  • Control circuit for controlling a semi-conductor switch for selectively outputting an output voltage at two voltage levels
    Patent number: 6181118
    Abstract: A control circuit (1) for controlling a FET (2) for outputting a 3.3 volt or a regulated 1.5 volt output to an AGP bus on a PC motherboard in response to a TYPEDET signal being applied to a control terminal (3) of the control circuit (1) through an input (6) of a voltage divider circuit (8). The TYPEDET signal is received from a video card receiving slot and indicates the type of video card in the slot of the motherboard. An amplifier (20) outputs a control signal to the gate of the FET (2) for either disabling the FET (2), or enabling the FET (2) to output the 1.5 volt or the 3.3 volt outputs. A decoding circuit (30) decodes the state of the control terminal (3) and controls the amplifier (20) to disable the FET (2) during power up. When the TYPEDET signal of zero volts, the FET (2) is operated to output the 1.5 regulated voltage output. When the TYPEDET signal is floating, the FET (2) outputs the 3.3 source voltage.
    Type: Grant
    Filed: June 24, 1999
    Date of Patent: January 30, 2001
    Assignee: Analog Devices, Inc.
    Inventors: Patrick Meehan, Brian Anthony Moane, George Francis Clernon