Patents by Inventor Shamsur R. Mazumder

Shamsur R. Mazumder 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).

  • RF digital phase shift modulators
    Patent number: 5148128
    Abstract: A BPSK (Binary-Phase-Shift-Keying) modulator having reduced amplitude and phase errors includes two non-ideal N.degree.-bit phase shifters disposed between two 3 dB quadrature couplers to perform out-of-phase combining. When the two phase bits are alternately switched between a reference state and a signal state being N.degree. out of phase with respect to the reference by the cancellation, a 180.degree. binary phase shift keying modulator having reduced amplitude and phase errors relative to the individual phase shifters is provided.
    Type: Grant
    Filed: October 25, 1991
    Date of Patent: September 15, 1992
    Assignee: Raytheon Company
    Inventor: Shamsur R. Mazumder