Patents by Inventor Boris Zaretsky

Boris Zaretsky 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).

  • Patent number: 6462926
    Abstract: A low loss diode ORing circuit has a feed input connected in series with a diode/transistor parallel network and the ouput. Heat is generated by the transistor when the transistor is turned on. A thermally conductive material (such as a heatsink) can dissipate heat and transfer heat from the transistor to the diode. The generated heat is transferred to the diode via the heatsink. As a result of the increased temperature of the diode and the diode's own negative temperature coefficient on conduction voltage, the diode's characteristic conduction threshold is reduced and the diode begins to conduct and share the current load as the current increases, thus providing minimal power dissipation as the current is routed to an output. A comparator may be used to monitor a voltage difference between the voltage level on the feed input and a voltage level on the output.
    Type: Grant
    Filed: December 15, 1999
    Date of Patent: October 8, 2002
    Assignee: Nortel Networks Limited
    Inventors: Boris Zaretsky, Roger M. Goodner
  • Patent number: 5769293
    Abstract: A trunk organizer is disclosed having a holding bar assembly, a plurality of receptacles and a mechanism for attaching the receptacles to the holding bar assembly. The holding bar assembly preferably comprises three axially aligned bars which longitudinally and axially slide toward and away from each other. Two of the bars can be axially moved away from each other for adjusting the length of the holding bar assembly. A compression spring between two of the portions allows for one portion to be held in a biased position relative to the other.
    Type: Grant
    Filed: October 25, 1995
    Date of Patent: June 23, 1998
    Inventor: Boris Zaretsky
  • Patent number: 5285366
    Abstract: A current mode power supply having a switching topology with a pulse width modulated duty cycle with a current sensing resistor is short circuit protected by a current limit circuit. The current limit circuit has inputs coupled to the current sensing resistor and the dc source input. The current limit circuit provide an output signal connected to the pulse width modulator, for shortening the duty cycle in dependence upon the sum of voltage signals from the current sensing resistor and the dc source input.
    Type: Grant
    Filed: September 24, 1992
    Date of Patent: February 8, 1994
    Assignee: Northern Telecom Limited
    Inventor: Boris Zaretsky
  • Patent number: D983640
    Type: Grant
    Filed: June 25, 2021
    Date of Patent: April 18, 2023
    Inventor: Boris Zaretsky