Patents by Inventor Rolly Hassun

Rolly Hassun 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 domain amplitude modulation method and apparatus
    Patent number: 4331941
    Abstract: A modulating signal is applied to an analog-to-digital converter which addresses a read-only memory phase look-up table. The read-only memory phase look-up table output is applied to a polarity generator. The polarity generator output and output from a phase accumulator are input to a phase adder. The phase adder output is applied to the input of a sine look-up read-only memory whose output is applied to a digital-to-analog converter and low-pass filtered to produce an amplitude-modulated carrier signal. The invention thereby digitally amplitude modulates a carrier signal in the phase domain without any multiplication being required.
    Type: Grant
    Filed: February 29, 1980
    Date of Patent: May 25, 1982
    Assignee: Hewlett-Packard Company
    Inventors: Al Kovalick, Rolly Hassun