Patents Examined by Mis: David
  • Patent number: 5225795
    Abstract: A digital quadrature modulator having a first storage device for receiving an I phase component of a digital baseband signal and digital carrier phase information as a higher order address and a lower order address, respectively, and a second storage device for receiving a Q phase component of the digital baseband signal and the digital carrier phase information as a higher order address and a lower order address, respectively. The carrier phases of the carrier phase information applied to the first and the second storage devices are out of phase from each other by .pi./2. The first storage device outputs a multiplication result of the I phase component and a carrier signal and the second storage device outputs a multiplication result of the Q phase component and the carrier signal based on these addresses. These outputs are added to each other in a digital manner and then converted into an analog signal which is supplied as a modulated signal.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: July 6, 1993
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Toshinori Iinuma
  • Patent number: 4973886
    Abstract: A four way rapid start fluorescent fixture with two ballast means each of which ballast means has three pairs of lamp wires emanating from one of its ends.
    Type: Grant
    Filed: August 14, 1989
    Date of Patent: November 27, 1990
    Assignee: North American Philips Corporation
    Inventors: Sol Hasson, Frank J. Gonzales