Patents by Inventor Anna Melamed

Anna Melamed 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).

  • Saturation control of a switching transistor
    Patent number: 4564769
    Abstract: The invention relates to a base control circuit for a switching transistor in which diodes are utilized to maintain the base-emitter voltage at a higher level than the collector-emitter voltage, upon the turn-on voltage being applied, to minimize switching-on losses while operating to avoid saturation.
    Type: Grant
    Filed: September 12, 1983
    Date of Patent: January 14, 1986
    Assignee: Danfoss A/S
    Inventor: Anna Melamed
  • Stabilizing circuit for an inverse rectifier motor control
    Patent number: 4535280
    Abstract: The invention relates to a stabilizing circuit for an inverse rectifier motor control which includes a D.C. voltage supply having a D.C. voltage regulator followed by a smoothing intermediate circuit. A frequency control circuit converts the supply voltage from the intermediate circuit to a frequency control voltage. Following the frequency control circuit is a generator for converting the frequency control voltage to control signals for the inverse rectifier motor control.
    Type: Grant
    Filed: March 28, 1984
    Date of Patent: August 13, 1985
    Assignee: Danfoss A/S
    Inventors: Nils-Ole Harvest, Anna Melamed