Patents by Inventor Edwin De Souza

Edwin De Souza 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).

  • Twisted pair and attachment unit interface (AUI) coding and transceiving circuit with full duplex, testing, and isolation modes
    Patent number: 5446914
    Abstract: An Ethernet circuit which provides encoder, decoder, twisted pair transceiver, and AUI interface functions in accordance with the IEEE 802.3 standard. In addition, the Ethernet circuit provides a full duplex function for independent transmit and receive paths, a test function which allows testing of the circuit without disturbing the twisted pair medium and regardless of activity on the medium, and an isolation function which allows the Ethernet circuit to be connected to a serial network interface controller in parallel with other devices. The Ethernet circuit can include a twisted pair driver that includes a filter function, a shielded/unshielded cable driver function, and a low idle current driver function.
    Type: Grant
    Filed: December 22, 1992
    Date of Patent: August 29, 1995
    Assignee: National Semiconductor Corporation
    Inventors: Prasun K. Paul, Edwin De Souza