Inventor · disambiguated record
P. Karl Scheller
Also filed as: SCHELLER P KARL
51 granted patents·2 pending applications·2,132 citations·filing 1988–2024
99Inventor score
Files withALLEGRO MICROSYSTEMS LLC26ALLEGRO MICROSYSTEMS INC11FRIEDRICH ANDREAS P4DWYER DANIEL S2SCHELLER P KARL2
Top patents by PatentIndex Score
53 records- 0199US11194004B2Diagnostic circuits and methods for sensor test circuitsALLEGRO MICROSYSTEMS LLC·Filed 2020·Granted Dec 7, 2021·8 cites·28 claims
- 0299US9812588B2Magnetic field sensor integrated circuit with integral ferromagnetic materialALLEGRO MICROSYSTEMS LLC·Filed 2013·Granted Nov 7, 2017·26 cites·15 claims
- 0399US9081041B2High accuracy differential current sensor for applications like ground fault interruptersFRIEDRICH ANDREAS P·Filed 2012·Granted Jul 14, 2015·62 cites·51 claims
- 0499US8818749B2Circuits and methods for generating a self-test of a magnetic field sensorALLEGRO MICROSYSTEMS LLC·Filed 2013·Granted Aug 26, 2014·48 cites·22 claims
- 0599US8447556B2Circuits and methods for generating a self-test of a magnetic field sensorFRIEDRICH ANDREAS P·Filed 2010·Granted May 21, 2013·104 cites·46 claims
- 0699US7800389B2Integrated circuit having built-in self-test featuresALLEGRO MICROSYSTEMS INC·Filed 2007·Granted Sep 21, 2010·113 cites·25 claims
- 0798US10230006B2Magnetic field sensor integrated circuit with an electromagnetic suppressorALLEGRO MICROSYSTEMS LLC·Filed 2017·Granted Mar 12, 2019·10 cites·25 claims
- 0898US9810519B2Arrangements for magnetic field sensors that act as tooth detectorsALLEGRO MICROSYSTEMS LLC·Filed 2013·Granted Nov 7, 2017·27 cites·18 claims
- 0998US9151771B2Apparatus and method for providing an output signal indicative of a speed of rotation and a direction of rotation of a ferromagnetic objectALLEGRO MICROSYSTEMS LLC·Filed 2013·Granted Oct 6, 2015·23 cites·16 claims
- 1098US9151807B2Circuits and methods for generating a self-test of a magnetic field sensorALLEGRO MICROSYSTEMS LLC·Filed 2014·Granted Oct 6, 2015·32 cites·24 claims
- 1198US8896295B2Magnetic field sensor having multiple sensing elements and a programmable misalignment adjustment device for misalignment detection and correction in current sensing and other applicationsFRIEDRICH ANDREAS P·Filed 2012·Granted Nov 25, 2014·28 cites·28 claims
- 1298US8754640B2Magnetic field sensors and related techniques that can provide self-test information in a formatted output signalVIG RAVI·Filed 2012·Granted Jun 17, 2014·58 cites·58 claims
- 1398US8624588B2Apparatus and method for providing an output signal indicative of a speed of rotation and a direction of rotation as a ferromagnetic objectVIG RAVI·Filed 2008·Granted Jan 7, 2014·93 cites·23 claims
- 1498US6525531B2Detection of passing magnetic articles while adapting the detection thresholdALLEGRO MICROSYSTEMS INC·Filed 2001·Granted Feb 25, 2003·190 cites·10 claims
- 1598US6297627B1Detection of passing magnetic articles with a peak-to-peak percentage threshold detector having a forcing circuit and automatic gain controlALLEGRO MICROSYSTEMS INC·Filed 1999·Granted Oct 2, 2001·201 cites·25 claims
- 1697US10254103B2Arrangements for magnetic field sensors that act as tooth detectorsALLEGRO MICROSYSTEMS LLC·Filed 2017·Granted Apr 9, 2019·14 cites·34 claims
- 1797US9007054B2Angle sensor with misalignment detection and correctionFRIEDRICH ANDREAS P·Filed 2012·Granted Apr 14, 2015·22 cites·16 claims
- 1897US8994369B2Apparatus and method for providing an output signal indicative of a speed of rotation and a direction of rotation of a ferromagnetic objectALLEGRO MICROSYSTEMS LLC·Filed 2013·Granted Mar 31, 2015·22 cites·23 claims
- 1996US10916665B2Magnetic field sensor integrated circuit with an integrated coilALLEGRO MICROSYSTEMS LLC·Filed 2019·Granted Feb 9, 2021·9 cites·20 claims
- 2096US8860404B2Magnetic field sensors and related techniques that can provide a self-test using signals and related thresholdsDWYER DANIEL S·Filed 2012·Granted Oct 14, 2014·44 cites·10 claims
- 2196US5917320ADetection of passing magnetic articles while periodically adapting detection thresholdALLEGRO MICROSYSTEMS INC·Filed 1997·Granted Jun 29, 1999·150 cites·17 claims
- 2295US10598514B2Magnetic field sensor to detect speed of angular rotation of a rotating magnetic structure, direction of the rotating magnetic structure or faultALLEGRO MICROSYSTEMS LLC·Filed 2017·Granted Mar 24, 2020·8 cites·24 claims
- 2395US9494660B2Integrated circuit package having a split lead frameALLEGRO MICROSYSTEMS LLC·Filed 2013·Granted Nov 15, 2016·21 cites·30 claims
- 2495US9329057B2Gear tooth sensor with peak and threshold detectorsFOLETTO ANDREA·Filed 2012·Granted May 3, 2016·21 cites·35 claims
- 2595US9222990B2Magnetic field sensors and related techniques that can communicate at least one of three or more potential categories in which one or more characteristic values of a proximity signal responsive to a proximity of a sensed object are categorizedDWYER DANIEL S·Filed 2012·Granted Dec 29, 2015·29 cites·43 claims
- 2695US6693419B2Proximity detectorALLEGRO MICROSYSTEMS INC·Filed 2002·Granted Feb 17, 2004·76 cites·20 claims
- 2795US6100680ADetecting the passing of magnetic articles using a transducer-signal detector having a switchable dual-mode thresholdALLEGRO MICROSYSTEMS INC·Filed 1997·Granted Aug 8, 2000·133 cites·6 claims
- 2895US5694038ADetector of passing magnetic articles with automatic gain controlALLEGRO MICROSYSTEMS INC·Filed 1996·Granted Dec 2, 1997·150 cites·9 claims
- 2994US11444209B2Magnetic field sensor integrated circuit with an integrated coil enclosed with a semiconductor die by a mold materialALLEGRO MICROSYSTEMS LLC·Filed 2020·Granted Sep 13, 2022·2 cites·16 claims
- 3093US10571301B2Frequency of an output signal of a magnetic field sensor to detect speed and direction of angular rotation of a rotating magnetic structure or a faultALLEGRO MICROSYSTEMS LLC·Filed 2017·Granted Feb 25, 2020·6 cites·22 claims
- 3193US10473486B2Duty cycle of an output signal of a magnetic field sensor to detect speed and direction of angular rotation of a rotating magnetic structure or a faultALLEGRO MICROSYSTEMS LLC·Filed 2017·Granted Nov 12, 2019·6 cites·28 claims
- 3293US8723512B1Circuits and methods for generating a threshold signal used in a magnetic field sensor based on a peak signal associated with a prior cycle of a magnetic field signalBURDETTE ERIC·Filed 2012·Granted May 13, 2014·38 cites·26 claims
- 3392US10782363B2Systems and methods for magnetic field sensors with self-testALLEGRO MICROSYSTEMS LLC·Filed 2017·Granted Sep 22, 2020·4 cites·25 claims
- 3492US9476899B2Circuits and methods for generating a threshold signal used in a motion detector in accordance with a least common multiple of a set of possible quantities of features upon a targetALLEGRO MICROSYSTEMS LLC·Filed 2014·Granted Oct 25, 2016·11 cites·36 claims
- 3591US9851416B2Systems and methods for magnetic field sensors with self-testALLEGRO MICROSYSTERNS LLC·Filed 2014·Granted Dec 26, 2017·13 cites·18 claims
- 3691US6232768B1Centering a signal within the dynamic range of a peak detecting proximity detectorALLEGRO MICROSYSTEMS INC·Filed 1997·Granted May 15, 2001·86 cites·7 claims
- 3791US5650719ADetection of passing magnetic articles while periodically adapting detection thresholds to changing amplitudes of the magnetic fieldALLEGRO MICROSYSTEMS INC·Filed 1996·Granted Jul 22, 1997·91 cites·5 claims
- 3890US10411498B2Apparatus and methods for extending sensor integrated circuit operation through a power disturbanceALLEGRO MICROSYSTEMS LLC·Filed 2016·Granted Sep 10, 2019·7 cites·32 claims
- 3990US10209279B2Methods and apparatus for monitoring a level of a regulated sourceALLEGRO MICROSYSTEMS LLC·Filed 2015·Granted Feb 19, 2019·4 cites·17 claims
- 4090US6242908B1Detection of passing magnetic articles while adapting the detection thresholdALLEGRO MICROSYSTEMS INC·Filed 1999·Granted Jun 5, 2001·78 cites·15 claims
- 4188US9520871B2Methods and apparatus for supply voltage transient protection for maintaining a state of a sensor output signalEAGEN JEFF·Filed 2012·Granted Dec 13, 2016·11 cites·11 claims
- 4288US8089270B2Magnetic field detector having a variable thresholdSCHELLER P KARL·Filed 2009·Granted Jan 3, 2012·16 cites·18 claims
- 4388US8058864B2Circuits and methods for providing a magnetic field sensor with an adaptable thresholdSCHELLER P KARL·Filed 2009·Granted Nov 15, 2011·18 cites·25 claims
- 4487US2024222526A1Magnetic field sensor integrated circuit with integral ferromagnetic materialALLEGRO MICROSYSTEMS LLC·Filed 2024·Application pending·0 cites
- 4584US11961920B2Integrated circuit package with magnet having a channelALLEGRO MICROSYSTEMS LLC·Filed 2023·Granted Apr 16, 2024·0 cites·16 claims
- 4683US11677032B2Sensor integrated circuit with integrated coil and element in central region of mold materialALLEGRO MICROSYSTEMS LLC·Filed 2022·Granted Jun 13, 2023·0 cites·19 claims
- 4783US8022692B2Direction detection sensorALLEGRO MICROSYSTEMS INC·Filed 2009·Granted Sep 20, 2011·13 cites·15 claims
- 4878US10837987B2Methods and apparatus for monitoring a level of a regulated sourceALLEGRO MICROSYSTEMS LLC·Filed 2018·Granted Nov 17, 2020·1 cites·17 claims
- 4978US9523742B2Circuits and methods for modulating current in circuits comprising sensing elementsALLEGRO MICROSYSTEMS LLC·Filed 2015·Granted Dec 20, 2016·2 cites·20 claims
- 5072US11585868B2Systems and methods for magnetic field sensors with self-testALLEGRO MICROSYSTEMS LLC·Filed 2020·Granted Feb 21, 2023·0 cites·19 claims
Showing the top 50 of 53 patent records by PatentIndex Score.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →