Patents by Inventor Melvin A. Schechtman

Melvin A. Schechtman 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).

  • Instantaneous deviation limiter with pre-emphasis and zero average value
    Patent number: 4802236
    Abstract: A modulation limiter that eliminates over-deviation otherwise caused by asymmetrical modulation signals in a frequency modulated (FM) transmitter. The output signal from a conventional modulation clipper is integrated, multiplied by a gain constant, and subtracted from the input, which causes the clipper output to have zero average and a high-pass frequency response with a time constant determined by the feedback gain. The zero average value allows the clipped modulation signal to be coupled to a modulator without over-deviation caused by shifts in the average value of the clipped signal, and the high-pass response can be used to give the modulation signal pre-emphasis.
    Type: Grant
    Filed: December 30, 1986
    Date of Patent: January 31, 1989
    Assignee: Motorola, Inc.
    Inventors: Thomas J. Walczak, Michael E. Rebeschini, Melvin A. Schechtman
  • Wide common mode range analog CMOS voltage comparator
    Patent number: 4598215
    Abstract: An improved analog CMOS comparator circuit is described. The improved circuit incorporates an additional CMOS device in the output stage of a conventional differential comparator. The additional device compensates for current imbalances which occur at relatively high common mode voltages thus allowing the improved comparator to operate over a wider range of common mode input voltages.
    Type: Grant
    Filed: November 3, 1983
    Date of Patent: July 1, 1986
    Assignee: Motorola, Inc.
    Inventors: Melvin A. Schechtman, Ronald H. Cieslak