Patents by Inventor Shawn W. Scarlett

Shawn W. Scarlett 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).

  • Plug-in device discrimination circuit and method
    Patent number: 6856046
    Abstract: A plug-in device discrimination circuit is connected to the contacts of a jack. When a plug-in device is plugged into the jack, the circuit discerns the type of device it is, thereby enabling proper interface circuitry to be connected to the plug-in device. The discrimination circuit includes a comparison circuit, a switching network, and a controller. The controller operates the switching network to connect the comparison circuit to the jack contacts. When so connected, the comparison circuit compares the electrical characteristics of at least two of the circuits contained within the plug-in device, and produces an output which varies with the results of the comparison. The controller receives the output of the comparison circuit and may configure additional circuitry to present an appropriate interface to the plug-in device.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: February 15, 2005
    Assignee: Analog Devices, Inc.
    Inventors: Shawn W. Scarlett, Steven E. Austin