Patents by Inventor Alexander Tulai

Alexander Tulai 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).

  • Digital phase reversal detector
    Patent number: 6259750
    Abstract: A phase reversal detector comprises a circuit for receiving an input signal subject to occasional phase reversals, a circuit for generating signals representing the quadrature components thereof, and a circuit responsive to a migration in the quadrature plane of the position of the quadrature components by an amount greater than a predetermined threshold to generate a signal indicative of a valid phase reversal. The detector is capable of exceeding the requirements of ITU standard G.165, and yet is simple to implement and works over a large dynamic range.
    Type: Grant
    Filed: June 25, 1998
    Date of Patent: July 10, 2001
    Assignee: Mitel Corporation
    Inventors: John Miller, Alexander Tulai
  • Scaleable digital signal processor with parallel architecture
    Patent number: 5960209
    Abstract: A distributed architecture parallel processing apparatus, includes a central microprocessor having at least one external interface connected to a similar interface of a neighboring parallel processor. The processors exchange data and control signals through the interfaces to cooperatively share in the execution of a program. An inter-processor status register in each processor maintains the current status of the processors.
    Type: Grant
    Filed: March 11, 1996
    Date of Patent: September 28, 1999
    Assignee: Mitel Corporation
    Inventors: Harold Blount, Alexander Tulai