[미국특허]
Methods and apparatus for magnetic sensor having integrated coil
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01R-033/00
G01R-033/09
출원번호
US-0468478
(2012-05-10)
등록번호
US-9817078
(2017-11-14)
발명자
/ 주소
Pepka, Gary T.
Taylor, William P.
출원인 / 주소
ALLEGRO MICROSYSTEMS LLC
대리인 / 주소
Daly, Crowley, Mofford & Durkee, LLP
인용정보
피인용 횟수 :
0인용 특허 :
207
초록
Methods and apparatus for a magnetic field sensor including a die, a coil proximate the die to generate a magnetic field, and a magnetic field sensing element having to detect changes in the magnetic field generated by the coil in response to a ferromagnetic target.
대표청구항▼
1. A magnetic field sensor, comprising: a die;a coil proximate the die to generate a magnetic field;a Hall element magnetic field sensing element on said die to detect changes in the magnetic field generated by the coil as a result of movement of a ferromagnetic target external to the magnetic field
1. A magnetic field sensor, comprising: a die;a coil proximate the die to generate a magnetic field;a Hall element magnetic field sensing element on said die to detect changes in the magnetic field generated by the coil as a result of movement of a ferromagnetic target external to the magnetic field sensor;a constant current source coupled to the coil such that alignment changes of the magnetic field generated by the coil with respect to the magnetic sensing element caused by movement of the target are detected by the magnetic field sensing element,wherein the movement of the ferromagnetic target to a first position causes a vector of the magnetic field generated by the coil to align substantially perpendicularly to the magnetic field sensing element which increases the magnetic field observed by the magnetic field sensing element, and further movement of the ferromagnetic target to a second position changes the magnetic field observed by the magnetic field sensing element; anda GMR magnetic sensing element positioned in relation to the coil, wherein the Hall element magnetic sensing element is configured for a first airgap distance, and the GMR magnetic sensing element is configured for a second airgap distance, which is greater than the first airgap distance. 2. The sensor according to claim 1, wherein the coil is integrated with the die. 3. The sensor according to claim 1, wherein the coil is substantially flat. 4. The sensor according to claim 1, wherein the coil comprises a solenoid. 5. The sensor according to claim 1, wherein the only a portion of the Hall magnetic field sensing element overlaps with the coil. 6. The sensor according to claim 1, wherein the Hall magnetic field sensing element is positioned at least in part between the coil and the die. 7. The sensor according to claim 1, wherein the coil is positioned at least in part between the Hall magnetic field sensing element and the die. 8. The sensor according to claim 1, wherein about half of an area of the Hall magnetic field sensing element overlaps with the coil. 9. The sensor according to claim 1, wherein about half of a length of the Hall magnetic field sensing element overlaps with the coil. 10. The sensor according to claim 1, wherein sensor includes a further magnetic field sensing element. 11. The sensor according to claim 1, wherein the die includes circuitry to process information from the Hall magnetic field sensor. 12. The sensor according to claim 1, wherein the Hall magnetic field sensing element has at least a portion that overlaps the coil. 13. The sensor according to claim 1, wherein the GMR magnetic field sensing element comprises a semiconductor device. 14. A magnetic field sensor, comprising: a die;a first means proximate the die for generating a magnetic field, wherein the first means comprises a coil; anda second means for detecting changes in the magnetic field generated by the first means as a result of movement of a ferromagnetic target external to the magnetic field sensor, wherein the second means comprises a Hall element magnetic sensing element;a constant current source means coupled to the first means such that alignment changes of the magnetic field generated by the coil with respect to the Hall magnetic sensing element caused by movement of the target are detected by the Hall magnetic field sensing element,wherein the movement of the ferromagnetic target to a first position causes a vector of the magnetic field generated by the coil to align substantially perpendicularly to the Hall magnetic field sensing element, which increases the magnetic field observed by the Hall magnetic field sensing element, and further movement of the ferromagnetic target to a second position changes the magnetic field observed by the Hall magnetic field sensing element, andand a GMR magnetic sensing element positioned in relation to the coil, wherein the Hall element magnetic sensing element is configured for a first airgap distance, and the GMR magnetic sensing element is configured for a second airgap distance, which is greater than the first airgap distance. 15. The sensor according to claim 14, wherein the first means is integrated with the die. 16. A method, comprising: providing a die within a magnetic field sensor;providing a coil proximate the die to generate a magnetic field;providing a Hall element magnetic field sensing element to detect changes in the magnetic field generated by the coil as a result of movement of a ferromagnetic target external to the magnetic field sensor;coupling a constant current source to the coil such that alignment changes of the magnetic field generated by the coil with respect to the magnetic sensing element caused by movement of the target are detected by the magnetic field sensing element,wherein the movement of the ferromagnetic target to a first position causes a vector of the magnetic field generated by the coil to align substantially perpendicularly to the magnetic field sensing element, which increases the magnetic field observed by the magnetic field sensing element, and further movement of the ferromagnetic target to a second position changes the magnetic field observed by the magnetic field sensing element; andproviding a GMR magnetic sensing element positioned in relation to the coil, wherein the Hall element magnetic sensing element is configured for a first airgap distance, and the GMR magnetic sensing element is configured for a second airgap distance, which is greater than the first airgap distance. 17. The method according to claim 16, wherein the coil is integrated on the die. 18. The method according to claim 16, wherein the GMR magnetic field sensing element is positioned at least in part between the coil and the die. 19. The method according to claim 16, wherein the coil is positioned at least in part between the GMR magnetic field sensing element and the die. 20. The method according to claim 16, wherein the GMR magnetic field sensing element has at least a portion that overlaps the coil. 21. A magnetic field sensor, comprising: a die;a coil proximate the die to generate a magnetic field, wherein the coil is integrated with the die;a GMR magnetic field sensing element on said die to detect changes in the magnetic field generated by the coil as a result of movement of a ferromagnetic target external to the magnetic field sensor, wherein the die includes circuitry to process information from the magnetic field sensing element;a constant current source coupled to the coil such that alignment changes of the magnetic field generated by the coil with respect to the magnetic sensing element caused by movement of the target are detected by the magnetic field sensing element,wherein the movement of the ferromagnetic target causes a vector of the magnetic field generated by the coil to align substantially parallel to the magnetic field sensing element; anda Hall magnetic sensing element positioned in relation to the coil, wherein the Hall element magnetic sensing element is configured for a first airgap distance, and the GMR magnetic sensing element is configured for a second airgap distance, which is greater than the first airgap distance. 22. The sensor according to claim 21, wherein the only a portion of the GMR magnetic field sensing element overlaps with the coil. 23. The sensor according to claim 21, wherein the GMR magnetic field sensing element is positioned at least in part between the coil and the die. 24. The sensor according to claim 21, wherein the coil is positioned at least in part between the GMR magnetic field sensing element and the die. 25. A magnetic field sensor, comprising: a die;a coil proximate the die to generate a magnetic field;a GMR magnetic field sensing element on said die to detect changes in the magnetic field generated by the coil as a result of movement of a ferromagnetic target external to the magnetic field sensor;a constant current source coupled to the coil such that alignment changes of the magnetic field generated by the coil with respect to the GMR magnetic sensing element caused by movement of the target are detected by the GMR magnetic field sensing element,wherein the movement of the ferromagnetic target to a first position causes a vector of the magnetic field generated by the coil to align substantially perpendicularly to the GMR magnetic field sensing element which increases the magnetic field observed by the GMR magnetic field sensing element, and further movement of the ferromagnetic target to a second position changes the magnetic field observed by the GMR magnetic field sensing element; anda Hall magnetic sensing element positioned in relation to the coil, wherein the Hall element magnetic sensing element is configured for a first airgap distance, and the GMR magnetic sensing element is configured for a second airgap distance, which is greater than the first airgap distance.
Ushiyama Randall K. (Torrance CA) Scruggs Michael K. (Pompton Plains NJ) Mathisen Eric C. (Brooklyn NY) Hahn Eric (Woodcliff Lake NJ), Active broadband magnetic flux rate feedback sensing arrangement.
Borden Peter G. (San Mateo CA) Stolz James (Milpitas CA), Apparatus and a method for dynamically tuning a particle sensor in response to varying process conditions.
Hlg Beat (Zug CHX) De Vries Jacob (Allenwinden CHX) Furrer Beat (Mettmenstetten CHX), Arrangement for improving the longterm stability of a Hall element.
Rano ; Jr. Albert V. (Manila PHX) Castro Romeo R. (Manila PHX) Tee Benjamin O. (Manila PHX), Assembling a lead frame between a pair of molding cavity plates.
Petr Jan (Stolzengrabenstr. 33 CH-6317 Oberwil CHX) Lienhard Heinz (Rosenbergweg 14 CH-6300 Zug CHX), Compensating circuit for a magnetic field sensor.
Wolf Ronald J. (Goshen IN) Hedeen Larry (Howe IN), Contactless linear angular position sensor having an adjustable flux concentrator for sensitivity adjustment and tempera.
Towne Jay M. ; Vig Ravi ; Scheller P. Karl, Detection of passing magnetic articles with a peak-to-peak percentage threshold detector having a forcing circuit and automatic gain control.
Klopfer Walter (Mossingen DEX) Haug Fritz (Pliezhausen PA DEX) Gabauer Dale (Freedom PA) Workley James (Imperial PA), Device for defect testing of non-ferromagnetic test samples and for ferromagnetic inclusions.
de Coulon Yves,CHX ; Bergqvist Johan Wilhelm,CHX ; de Lambilly Herve,CHX, Device for detecting position and movement by using magnetic field variation.
Seiler Hartmut (Baden-Baden DEX) Haderer Guenter (Buehl DEX) Aab Volker (Sasbach DEX) Peter Cornelius (Buehl-Neusatz DEX), Device for detecting the movement of a movable component and signalling the detected movement over a single line.
Jager Heimo,ATX ; Kostler Werner,ATX, Device for increasing the magnetic flux density in the vicinity of a hall sensor cooperating with a magnet wheel.
Sheppard William R. (Granada Hills CA) Tam Kent K. (Monterey Park CA), Eddy current probe having body of high permeability supporting drive coil and plural sensors.
Wolf Ronald J. ; Lynch Martin James ; Nuss John Richard, Electronic circuit for automatically compensating for errors in a sensor with an analog output signal.
Goller, Bernd; Hagen, Robert-Christian; Stuempfl, Christian; Wein, Stefan; Woerner, Holger, Electronic device configured as a multichip module, leadframe, panel with leadframe positions, and method for producing the electronic device.
Daeche,Frank; Petter,Franz, Electronic device having a plastic housing and components of a height-structured metallic leadframe and methods for the production of the electronic device.
Engel Raymond W. (Southbridge MA) Gilbert Peter J. (Henniker NH) Vig Ravi (Bow NH) Tu Teri (Bow NH) Clapp Terry (Goffstown NH), Hall-effect ferrous-article-proximity sensor assembly.
Davidson Robert M. (Freeport IL) Eaton William E. (Stockton IL) Furlong Gregory R. (Freeport IL) Michelhaugh Scott E. (Cedarville IL) Rowley James W. (German Valley IL) Ross Gordon F. (Freeport IL) S, Magnet carrier disposed within an outer housing.
Lamb,Wayne A.; Frazee,Lawrence E.; Schelonka,Peter A.; Stolfus,Joel D., Magnet orientation and calibration for small package turbocharger speed sensor.
Dettmann Fritz (Sinn-Edingen DEX) Loreit Uwe (Wetzlar DEX), Magnetic field sensor constructed from a remagnetization line and one magnetoresistive resistor or a plurality of magnet.
Frazee Lawrence E. ; Ricks Lamar F. ; Smith Paul E., Magnetic sensor with a chip attached to a lead assembly within a cavity at the sensor's sensing face.
Bunyer Scott L. ; Busch Nicholas F. ; Stolfus Joel D., Magnetic sensor with a magnetically sensitive component that is movable during calibration and rigidly attachable to a f.
Liddell Peter A. (Freeport IL) Mueller Douglas L. (Freeport IL) Wohlers Gary L. (Cedarville IL), Magnetic sensor with means for retaining a magnet at a precise calibrated position.
Tatschl,David; Hammerschmidt,Dirk; Zimmer,Juergen, Magnetoresistive sensor element and method of assembling magnetic field sensor elements with on-wafer functional test.
Graham Martin H. (Berkeley CA) Taylor Matthew (Pleasant Hill CA) Miller Mark (Oakland CA) Braun Kevin (Pleasanton CA), Method and apparatus for time dependent data transmission.
Fermon, Claude; Pannetier, Myriam; Biziere, Nicolas; Vacher, Francois; Sollier, Thierry, Method and device for non destructive evaluation of defects in a metallic object.
Sumcad Gustavo L. (Freeport IL), Method for calibrating a sensor by moving a magnet while monitoring an output signal from a magnetically sensitive compo.
Schroeder Thaddeus (Rochester Hills MI) Leung Chi H. (Rochester Hills MI) Lequesne Bruno P. B. (Troy MI) Ward Robert W. (Anderson IN), Method for embedding wires within a powder metal core and sensor assembly produced by such a method.
Nagy Bela G. (Acton MA) Feinstein Leonard G. (Westborough MA) Kasem Yehya M. (Northboro MA), Method for making a semiconductor package with the distance between a lead frame die pad and heat spreader determined by.
Highum Edward Allan ; Mueller Alfred Wilhelm ; Nash Thomas William ; Stadler Ewald Emil Gottlob,DEX ; Thorvilson Scott Marvin, Method for manufacturing electro-magnetic shield having multiple polymeric layers of differing fill compositions.
Shin Hyun-Kyung (Seoul KRX) Han Dae-Seok (Seoul KRX) Yi Ock-Sook (Seoul KRX), Method for the inhibition of oxidation of edible oils utilizing a fat soluble anti-oxidant and a water soluble anti-oxda.
Grader Gideon S. (Haifa NJ ILX) Johnson ; Jr. David W. (Pluckemin NJ) Roy Apurba (Rockwall TX) Thomson ; Jr. John (Spring Lake NJ), Method of making a multilayer monolithic magnetic component.
Kuah, Teng Hock; Ho, Shu Chuen; Vath, III, Charles Joseph; Lim, Loon Aik; Hui, Man Ho; Koh, Juay Sim, Mold and method for encapsulation of electronic device.
Carr Ronald E. (Plantation FL) Schneider Matthew L. (Margate FL) Payne Paul E. (Ft. Lauderdale FL), Non-oriented direct coupled gear tooth sensor using a Hall cell.
Schroeder Thaddeus (Rochester Hills MI) Lequesne Bruno P. B. (Troy MI) Lake Donald E. (Kokomo IN) Zgunda John S. (Muncie IN) Feaster Daniel I. (Anderson IN) Shinkle George A. (Luxembourg IN LUX) Ward, Package for the magnetic field sensitive device.
Popovic Radivoje (Zug CHX) Hrejsa Jan (Oberwil CHX), Plurality of arrangements each including an IC magnetic field sensor and two ferromagnetic field concentrators, and a pr.
Henry Rassem R. (Clinton Township MI) Lequesne Bruno P. B. (Troy MI) Schroeder Thaddeus (Rochester Hills MI), Position sensor for electromechanical suspension.
Vig, Ravi; David, Paul; Milano, Shaun D.; Doogue, Michael C.; Haas, David J., Self-calibration algorithms in a small motor driver IC with an integrated position sensor.
Guillotte Paul A. (Worcester MA) Panaccione Paul (Barre MA) Martiska Thomas J. (Shrewsbury MA) Gagnon Jay J. (Holden MA), Semiconductor die and mounting assembly.
Schroeder Thaddeus (Rochester Hills MI) Leung Chi H. (Rochester Hills MI) Lequesne Bruno P. B. (Troy MI) Ward Robert W. (Anderson IN), Sensor assembly having embedded wires within a powder metal core and a method therefor.
Schott, Christian; Racz, Robert; Popovic, Radivoje, Sensor for the detection of the direction of a magnetic field having magnetic flux concentrators and hall elements.
Laurence Douglas Lewicki, Switched capacitor filter circuit having reduced offsets and providing offset compensation when used in a closed feedback loop.
Thibaud Marc (Soisy sous Montmorency FRX), System for sensing the position of a rotating steel shaft including a track formed by a strip having discontinuous elect.
McCurley Jeffrey L. ; White James E. ; Jarrard Craig A. ; Nonnenmacher Ronald C. ; Zdanys ; Jr. John ; Olson Thomas R., Two axis position sensor using sloped magnets to generate a variable magnetic field and hall effect sensors to detect the variable magnetic field.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.