Patents by Inventor Sherif H. Galal

Sherif H. Galal 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).

  • Method and apparatus for rejecting image signals in a receiver
    Patent number: 6195539
    Abstract: In one embodiment, an apparatus comprising a mixing network coupled to a summing stage is presented. The mixing network is operative to receive a signal and process the received signal along a first branch of the mixing network to produce a first mixed signal containing an image signal, and along a second branch of the mixing network to produce a second mixed signal containing the image signal and a desired signal. The summing stage, coupled to the first and second branch of the mixing network, is operative to subtract the first mixed signal from the second mixed signal to produce a downconverted signal comprising the desired signal while rejecting the image signal.
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: February 27, 2001
    Assignee: Mentor Graphics Corporation
    Inventors: Sherif H. Galal, Mohamed S. Tawfik
  • Method and apparatus for rejecting image signals in a receiver
    Patent number: 6161004
    Abstract: In one embodiment, an apparatus comprising a mixing network coupled to a summing stage is presented. The mixing network is operative to receive a signal and process the received signal along a first branch of the mixing network to produce a first mixed signal containing an image signal, and along a second branch of the mixing network to produce a second mixed signal containing the image signal and a desired signal. The summing stage, coupled to the first and second branch of the mixing network, is operative to subtract the first mixed signal from the second mixed signal to produce a downconverted signal comprising the desired signal while rejecting the image signal.
    Type: Grant
    Filed: January 6, 1999
    Date of Patent: December 12, 2000
    Assignee: Mentor Graphics Corporation
    Inventors: Sherif H. Galal, Mohamed S. Tawfik