Patents Assigned to Vishay Dale Electronics, Inc.
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Publication number: 20130193851Abstract: A system, method and circuit for providing constant current to an LED array are described herein. These include a resistor coupled to the LED array and a thermistor coupled to the LED array and the resistor. The resistor and the thermistor limit the current at a given temperature and compensate for the forward voltage shift of the LED array as a function of temperature. The system, method and integrated circuit may also include a fuse coupled to the thermistor. The fuse allows the system to continue to operate if a single LED within the LED array fails to short-circuit.Type: ApplicationFiled: January 25, 2013Publication date: August 1, 2013Applicant: VISHAY DALE ELECTRONICS, INC.Inventor: VISHAY DALE ELECTRONICS, INC.
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Publication number: 20130113600Abstract: A resistor includes a substantially cylindrical resistive element having a resistance of less than about 1 m?, a substantially cylindrical first termination electrically connected to the resistive element and a second termination electrically connected to the resistive element. The substantially cylindrical first termination is hollow to allow for accepting a connection such as from a battery cable. In addition there may be sense leads present on the resistor. A method of forming a substantially cylindrical resistor includes forming a hollow cylindrical resistor body by rolling a flat sheet comprising a resistive element and a first termination and a second termination joined on opposite ends of the resistive element.Type: ApplicationFiled: December 28, 2012Publication date: May 9, 2013Applicant: VISHAY DALE ELECTRONICS, INC.Inventor: VISHAY DALE ELECTRONICS, INC.
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Publication number: 20130106562Abstract: An electrical component is disclosed. The electrical component includes a current conducting coil having inside and outside surface and terminal ends that are configured for connection to an electrical circuit and compressed iron particles that form a body which completely contacts the inside and outside surfaces of the coil for magnetically shielding the coil and leaving the terminal ends exposed for connection to the electrical circuit.Type: ApplicationFiled: December 19, 2012Publication date: May 2, 2013Applicant: VISHAY DALE ELECTRONICS, INC.Inventor: VISHAY DALE ELECTRONICS, INC.
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Publication number: 20130091696Abstract: A metal strip resistor is provided with a resistive element disposed between a first termination and a second termination. The resistive element, first termination, and second termination form a substantially flat plate. A thermally conductive and electrically non-conductive thermal interface material such as a thermally conductive adhesive is disposed between the resistive element and first and second heat pads that are placed on top of the resistive element and adjacent to the first and second terminations, respectively.Type: ApplicationFiled: November 30, 2012Publication date: April 18, 2013Applicant: Vishay Dale Electronics, Inc.Inventor: Vishay Dale Electronics, Inc.
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Publication number: 20130055556Abstract: A highly coupled inductor includes a first ferromagnetic plate, a second ferromagnetic plate, a film adhesive between the first ferromagnetic plate and the second ferromagnetic plate, a first conductor between the first plate and the second plate, and a second conductor between the first plate and the second plate. A conducting electromagnetic shield may be positioned proximate the first conductor for enhancing coupling and reducing leakage flux. A method of manufacturing a highly coupled inductor component includes providing a first ferromagnetic plate and a second ferromagnetic plate, placing conductors between the first ferromagnetic plate and the second ferromagnetic plate, and connecting the first ferromagnetic plate and the second ferromagnetic plate using a film adhesive.Type: ApplicationFiled: August 31, 2012Publication date: March 7, 2013Applicant: Vishay Dale Electronics, Inc.Inventor: Thomas T. Hansen
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Patent number: 8378772Abstract: An inductor includes an inductor body having a top surface and a first and second opposite end surfaces. There is a void through the inductor body between the first and second opposite end surfaces. A thermally stable resistive element positioned through the void and turned toward the top surface to forms surface mount terminals which can be used for Kelvin type sensing. Where the inductor body is formed of a ferrite, the inductor body includes a slot. The resistive element may be formed of a punched resistive strip and provide for a partial turn or multiple turns. The inductor may be formed of a distributed gap magnetic material formed around the resistive element. A method for manufacturing the inductor includes positioning an inductor body around a thermally stable resistive element such that terminals of the thermally stable resistive element extend from the inductor body.Type: GrantFiled: August 4, 2011Date of Patent: February 19, 2013Assignee: Vishay Dale Electronics, Inc.Inventors: Thomas T. Hansen, Jerome J. Hoffman, Timothy Shafer, Nicholas J. Schade, David Lange, Clark Smith, Rod Brune
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Patent number: 8344846Abstract: A resistor includes a substantially cylindrical resistive element having a resistance of less than about 1 m?, a substantially cylindrical first termination electrically connected to the resistive element and a second termination electrically connected to the resistive element. The substantially cylindrical first termination is hollow to allow for accepting a connection such as from a battery cable. In addition there may be sense leads present on the resistor. A method of forming a substantially cylindrical resistor includes forming a hollow cylindrical resistor body by rolling a flat sheet comprising a resistive element and a first termination and a second termination joined on opposite ends of the resistive element.Type: GrantFiled: March 18, 2011Date of Patent: January 1, 2013Assignee: Vishay Dale Electronics, Inc.Inventors: Clark L. Smith, Joel J. Smejkal, David L. Lange, Thomas L. Bertsch, Steve Hendricks, Rod Brune
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Patent number: 8325007Abstract: A metal strip resistor is provided with a resistive element disposed between a first termination and a second termination. The resistive element, first termination, and second termination form a substantially flat plate. A thermally conductive and electrically non-conductive thermal interface material such as a thermally conductive adhesive is disposed between the resistive element and first and second heat pads that are placed on top of the resistive element and adjacent to the first and second terminations, respectively.Type: GrantFiled: December 30, 2009Date of Patent: December 4, 2012Assignee: Vishay Dale Electronics, Inc.Inventors: Clark L. Smith, Todd L. Wyatt, Thomas L. Bertsch, Rodney J. Brune
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Publication number: 20120299694Abstract: A metal strip resistor is provided. The metal strip resistor includes a metal strip forming a resistive element and providing support for the metal strip resistor without use of a separate substrate. There are first and second opposite terminations overlaying the metal strip. There is plating on each of the first and second opposite terminations. There is also an insulating material overlaying the metal strip between the first and second opposite terminations. A method for forming a metal strip resistor wherein a metal strip provides support for the metal strip resistor without use of a separate substrate is provided. The method includes coating an insulative material to the metal strip, applying a lithographic process to form a conductive pattern overlaying the resistive material wherein the conductive pattern includes first and second opposite terminations, electroplating the conductive pattern, and adjusting resistance of the metal strip.Type: ApplicationFiled: August 8, 2012Publication date: November 29, 2012Applicant: Vishay Dale Electronics, Inc.Inventors: Clark L. Smith, Thomas L. Bertsch, Todd L. Wyatt, Thomas L. Veik, Rodney Brune
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Patent number: 8319598Abstract: A power resistor includes first and second opposite terminations, a resistive element formed from a plurality of resistive element segments between the first and second opposite terminations, at least one segmenting conductive strip separating two of the resistive element segments, and at least one open area between the first and second opposite terminations and separating at least two resistive element segments. Separation of the plurality of resistive element segments assists in spreading heat throughout the power resistor. The power resistor or other electronic component may be packaged by bonding to a heat sink tab with a thermally conductive and electrically insulative material.Type: GrantFiled: November 19, 2010Date of Patent: November 27, 2012Assignee: Vishay Dale Electronics, Inc.Inventors: Felix Zandman, Clark L. Smith, Todd L. Wyatt, Thomas L. Veik, Thomas L. Bertsch
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Publication number: 20120293299Abstract: A current sense resistor and a method of manufacturing a current sensing resistor with temperature coefficient of resistance (TCR) compensation are disclosed. The resistor has a resistive strip disposed between two conductive strips. A pair of main terminals and a pair of voltage sense terminals are formed in the conductive strips. A pair of rough TCR calibration slots is located between the main terminals and the voltage sense terminals, each of the rough TCR calibration slots have a depth selected to obtain a negative starting TCR value observed at the voltage sense terminals. A fine TCR calibration slot is formed between the pair of voltage sense terminals.Type: ApplicationFiled: June 11, 2012Publication date: November 22, 2012Applicant: Vishay Dale Electronics, Inc.Inventors: Clark L. Smith, Thomas L. Bertsch, Todd L. Wyatt, Thomas L. Veik
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Publication number: 20120281363Abstract: A heat spreader for a resistive element is provided, the heat spreader having a body portion that is arranged over a top surface of the resistive element and electrically insulated from the resistive element. The heat spreader also includes one or more leg portion that extends from the body portion and are associated with the heat sink in a thermally conductive relationship.Type: ApplicationFiled: May 3, 2012Publication date: November 8, 2012Applicant: VISHAY DALE ELECTRONICS, INC.Inventors: Clark L. Smith, Todd L. Wyatt, Thomas L. Veik
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Patent number: 8258907Abstract: A highly coupled inductor includes a first ferromagnetic plate, a second ferromagnetic plate, a film adhesive between the first ferromagnetic plate and the second ferromagnetic plate, a first conductor between the first plate and the second plate, and a second conductor between the first plate and the second plate. A conducting electromagnetic shield may be positioned proximate the first conductor for enhancing coupling and reducing leakage flux. A method of manufacturing a highly coupled inductor component includes providing a first ferromagnetic plate and a second ferromagnetic plate, placing conductors between the first ferromagnetic plate and the second ferromagnetic plate, and connecting the first ferromagnetic plate and the second ferromagnetic plate using a film adhesive.Type: GrantFiled: April 28, 2011Date of Patent: September 4, 2012Assignee: Vishay Dale Electronics, Inc.Inventor: Thomas T. Hansen
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Patent number: 8248202Abstract: A metal strip resistor includes a resistor body having a resistive element formed from a strip of an electrically resistive metal material and a first termination electrically connected to the resistive element to form a first junction and a second termination electrically connected to the resistive element to form a second junction, the first termination and the second termination formed from strips of electrically conductive metal material. The resistive element, the first termination, and the second termination being arranged mitigate thermally induced voltages between the first junction and the second junction.Type: GrantFiled: August 6, 2009Date of Patent: August 21, 2012Assignee: Vishay Dale Electronics, Inc.Inventors: Doug Brackhan, Clark L. Smith, Thomas L. Veik
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Patent number: 8242878Abstract: A metal strip resistor is provided. The metal strip resistor includes a metal strip forming a resistive element and providing support for the metal strip resistor without use of a separate substrate. There are first and second opposite terminations overlaying the metal strip. There is plating on each of the first and second opposite terminations. There is also an insulating material overlaying the metal strip between the first and second opposite terminations. A method for forming a metal strip resistor wherein a metal strip provides support for the metal strip resistor without use of a separate substrate is provided. The method includes coating an insulative material to the metal strip, applying a lithographic process to form a conductive pattern overlaying the resistive material wherein the conductive pattern includes first and second opposite terminations, electroplating the conductive pattern, and adjusting resistance of the metal strip.Type: GrantFiled: September 5, 2008Date of Patent: August 14, 2012Assignee: Vishay Dale Electronics, Inc.Inventors: Clark L. Smith, Thomas L. Bertsch, Todd L. Wyatt, Thomas L. Veik, Rodney Brune
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Patent number: 8198977Abstract: A current sense resistor and a method of manufacturing a current sensing resistor with temperature coefficient of resistance (TCR) compensation is disclosed. The resistor has a resistive strip disposed between two conductive strips. A pair of main terminals and a pair of voltage sense terminals are formed in the conductive strips. A pair of rough TCR calibration slots are located between the main terminals and the voltage sense terminals, each of the rough TCR calibration slots have a depth selected to obtain a negative starting TCR value observed at the voltage sense terminals. A fine TCR calibration slot is formed between the pair of voltage sense terminals. The fine TCR calibration slot has a depth selected to obtain a TCR value observed at the voltage sense terminals that approaches zero. The resistor can also have a resistance calibration slot located between the pair of main terminals. The resistance calibration slot has a depth selected to calibrate a resistance value of the resistor.Type: GrantFiled: September 2, 2010Date of Patent: June 12, 2012Assignee: Vishay Dale Electronics, Inc.Inventors: Clark L. Smith, Thomas L. Bertsch, Todd L. Wyatt, Thomas L. Veik
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Publication number: 20120139685Abstract: An inductor includes an inductor body having a top surface and a first and second opposite end surfaces. There is a void through the inductor body between the first and second opposite end surfaces. A thermally stable resistive element positioned through the void and turned toward the top surface to forms surface mount terminals which can be used for Kelvin type sensing. Where the inductor body is formed of a ferrite, the inductor body includes a slot. The resistive element may be formed of a punched resistive strip and provide for a partial turn or multiple turns. The inductor may be formed of a distributed gap magnetic material formed around the resistive element. A method for manufacturing the inductor includes positioning an inductor body around a thermally stable resistive element such that terminals of the thermally stable resistive element extend from the inductor body.Type: ApplicationFiled: August 4, 2011Publication date: June 7, 2012Applicant: Vishay Dale Electronics, Inc.Inventors: Thomas T. Hansen, Jerome J. Hoffman, Timothy Shafer, Nicholas J. Schade, David Lange, Clark Smith, Rod Brune
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Publication number: 20120086535Abstract: A high current, low profile inductor includes a conductor coil surrounded by magnetic material to form an inductor body. An inductor body is formed around the inductor coil and includes a resin and a magnetic material compressed while it is dry and surrounding the inside and the outside of the coil.Type: ApplicationFiled: May 17, 2011Publication date: April 12, 2012Applicant: VISHAY DALE ELECTRONICS, INC.Inventors: Timothy M. Shafer, Brett W. Jelkin
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Publication number: 20110298572Abstract: A biased gap inductor includes a first ferromagnetic plate, a second ferromagnetic plate, a conductor sandwiched between the first ferromagnetic plate and the second ferromagnetic plate, and an adhesive between the first ferromagnetic plate and the second ferromagnetic plate, the adhesive comprising magnet powder to thereby form at least one magnetic gap. A method of forming an inductor includes providing a first ferromagnetic plate and a second ferromagnetic plate and a conductor, placing the conductor between the first ferromagnetic plate and the second ferromagnetic plate, adhering the first ferromagnetic plate to the second ferromagnetic plate with a composition comprising an adhesive and a magnet powder to form magnetic gaps, and magnetizing the inductor.Type: ApplicationFiled: August 19, 2011Publication date: December 8, 2011Applicant: Vishay Dale Electronics, Inc.Inventor: Thomas T. Hansen
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Patent number: 8018310Abstract: An inductor includes an inductor body having a top surface and a first and second opposite end surfaces. There is a void through the inductor body between the first and second opposite end surfaces. A thermally stable resistive element positioned through the void and turned toward the top surface to forms surface mount terminals which can be used for Kelvin type sensing. Where the inductor body is formed of a ferrite, the inductor body includes a slot. The resistive element may be formed of a punched resistive strip and provide for a partial turn or multiple turns. The inductor may be formed of a distributed gap magnetic material formed around the resistive element. A method for manufacturing the inductor includes positioning an inductor body around a thermally stable resistive element such that terminals of the thermally stable resistive element extend from the inductor body.Type: GrantFiled: September 27, 2006Date of Patent: September 13, 2011Assignee: Vishay Dale Electronics, Inc.Inventors: Thomas T. Hansen, Jerome J. Hoffman, Timothy Shafer, Nicholas J. Schade, David Lange, Clark Smith, Rod Brune