Patents by Inventor Clifford Kondratiuk

Clifford Kondratiuk 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).

  • Electronic musical instrument using FM sound generation with delayed modulation effect
    Patent number: 5243124
    Abstract: A computer having one or more wave tables stored therein is used to synthesize sounds represented by a series of digital samples produced at a sample rate by specifying parameters including a carrier frequency, a modulating frequency and an index of modulation. At each sample time, a modulation value determined during an immediately preceding sample time is scaled to produce a digital control signal. Also at each sample time the modulation value to be used during an immediately succeeding sample time is read from a location of a wave table determined by the modulating frequency, and a carrier value used to produce the digital samples is read from a location of a wave table determined by the carrier frequency and the digital control signal. Modulation effects are therefore delayed by one sample in order to speed execution of the method using the computer.
    Type: Grant
    Filed: March 19, 1992
    Date of Patent: September 7, 1993
    Assignee: Sierra Semiconductor, Canada, Inc.
    Inventors: Clifford Kondratiuk, Karim Mitha