Patents Assigned to Allegro Microsystems, LLC
  • Patent number: 8486755
    Abstract: Magnetic field sensors and associated methods of manufacturing the magnetic field sensors include molded structures to encapsulate a magnetic field sensing element and an associated die attach pad of a lead frame and to also encapsulate or form a magnet or a flux concentrator.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: July 16, 2013
    Assignee: Allegro Microsystems, LLC
    Inventors: Virgil Ararao, Nirmal Sharma, Raymond W. Engel, Jay Gagnon, John Sauber, William P. Taylor, Elsa Kam-Lum
  • Patent number: 8482225
    Abstract: A circuit for driving an LED load with a controllable converter includes a control circuit configured to turn off the converter in response to a PWM signal having a first level and to turn on the converter in response to the PWM signal having a second level. A load disconnect switch coupled in series with the LED load is also controlled by the PWM signal so that the load disconnect switch is opened when the PWM signal turns off the converter to thereby open the load current path.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: July 9, 2013
    Assignee: Allegro Microsystems, LLC
    Inventor: Gregory Szczeszynski
  • Patent number: 8476875
    Abstract: A set top box used in a satellite TV system includes a diode coupled in a particular way to better protect an adjustable linear regulator used in the set top box from transient voltages as may result from lighting or the like.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: July 2, 2013
    Assignee: Allegro Microsystems, LLC.
    Inventor: Eric J. Reicher
  • Patent number: 8461677
    Abstract: Magnetic field sensors and associated methods of manufacturing the magnetic field sensors include molded structures to encapsulate a magnetic field sensing element and an associated die attach pad of a lead frame and to also encapsulate or form a magnet or a flux concentrator.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: June 11, 2013
    Assignee: Allegro Microsystems, LLC
    Inventors: Virgil Ararao, Nirmal Sharma, Raymond W. Engel, Jay Gagnon, John Sauber, William P. Taylor, Elsa Kam-Lum
  • Patent number: 8461782
    Abstract: A mechanism for assigning unique addresses to identical devices attached to a serial bus is presented. Each device has at least one output and is provided with a storage device to provide a configurable portion of a bus address having a fixed portion and a configurable portion. The device is further provided with circuitry, coupled to the storage device and the output, to determine a state of the output and use the state to configure the configurable portion. Once the configurable portion is configured, the bus address uniquely identifies the device. Such configuration allows more than one such device to be coupled to the same serial bus, e.g., an I2C bus.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: June 11, 2013
    Assignee: Allegro Microsystems, LLC
    Inventors: Michael G. Ward, David J. Haas, William P. Taylor
  • Patent number: 8451002
    Abstract: A magnetic field sensor includes a compensation loop coupled in series with normal circuit couplings in order to reduce a transient signal that would otherwise be generated when the magnetic field sensor experiences a high rate of change of magnetic field. In some embodiments, the magnetic field sensor is a current sensor responsive to a magnetic field generated by a current-carrying conductor.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: May 28, 2013
    Assignee: Allegro Microsystems, LLC
    Inventors: Weihua Chen, Michael G. Ward
  • Patent number: 8450996
    Abstract: A motion sensor has a magnetic field sensing element for generating a magnetic field signal and a state processor to identify a plurality of states corresponding to ranges of signal values of the magnetic field signal. The state processor includes a state peak logic module configured to generate states that have a reduced amount of state chatter.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: May 28, 2013
    Assignee: Allegro Microsystems, LLC
    Inventors: Andrea Foletto, Devon Fernandez, Eric Burdette