-
公开(公告)号：US10782152B2
公开(公告)日：2020-09-22
申请号：US15678369
申请日：2017-08-16
Applicant: Allegro MicroSystems, LLC
Inventor： Yannick Vuillermet , Andrea Foletto , Andreas P. Friedrich
Abstract: A magnetic field sensor for determining a position of a magnet, the position identified by one or more position variables can include: one or more magnetic field sensing element operable to generate one or more magnetic field measurements of the magnet and an associated one or more measured magnetic field variable values; a first module for identifying calculated magnetic field variable values associated with a plurality of positions of the magnet; a second module operable to perform an optimization process to determine a value of a distance function, the distance function using the one or more measured magnetic field variable values and the calculated magnetic field variable values; and a third module operable to determine the position of the magnet by associating the value of the distance function with corresponding values of the one or more position variables. A complimentary method can be used in the magnetic field sensor.
-
公开(公告)号：US10605874B2
公开(公告)日：2020-03-31
申请号：US16055644
申请日：2018-08-06
Applicant: Allegro MicroSystems, LLC
Inventor： Rémy Lassalle-Balier , Jeffrey Eagen , Andrea Foletto
Abstract: A magnetic field sensor includes a substrate having a surface and a plurality of magnetoresistance elements supported by the surface of the substrate. Each magnetoresistance element has a respective width parallel to the surface, and each width may be a smallest dimension parallel to the surface. A first width of a first magnetoresistance element of the plurality of magnetoresistance elements may be different from a second width of a second magnetoresistance element of the plurality of magnetoresistance elements. A processing circuit may be coupled to the plurality of magnetoresistance elements to receive a signal representing a detected magnetic field from at least one of the magnetoresistance elements.
-
公开(公告)号：US10598739B2
公开(公告)日：2020-03-24
申请号：US16290017
申请日：2019-03-01
Applicant: Allegro MicroSystems, LLC
Inventor： Eric G. Shoemaker , Zachary Richards , Andrea Foletto
Abstract: A magnetic field sensor includes a plurality of magnetic field sensing elements configured to generate at least two measured magnetic field signals indicative of a magnetic field affected by an object and having a first predetermined phase difference with respect to each other and a controller responsive to the at least two measured magnetic field signals. The controller is configured to generate at least one virtual magnetic field signal having a second predetermined phase difference with respect to at least one of the measured magnetic field signals. In embodiments, the virtual magnetic field signal has the second predetermined phase difference with respect to each of the at least two measured magnetic field signals.
-
公开(公告)号：US10386427B1
公开(公告)日：2019-08-20
申请号：US15892843
申请日：2018-02-09
Applicant: Allegro MicroSystems, LLC
Inventor： Andreas P. Friedrich , Andrea Foletto , Nicolas Yoakim
Abstract: A magnetic field sensor for sensing a direction of a magnetic field in an x-y plane, can include a first plurality of magnetic field sensing elements operable to generate a first plurality of magnetic field signals and a second plurality of magnetic field sensing elements operable to generate a second plurality of magnetic field signals. The magnetic field sensor can also include at least one sequence switches circuit operable to select ones of the first plurality of magnetic field signals and to select ones of the second plurality of magnetic field signals. The magnetic field sensor can also include a processing circuit operable to combine the selected ones of the first plurality of magnetic field signals and the selected ones of the second plurality of magnetic field signals to generate at least one sequential signal and to process the at least one sequential signal to generate an x-y angle signal indicative of a direction of the magnetic field in the x-y direction. An associated method is described.
-
公开(公告)号：US20180088184A1
公开(公告)日：2018-03-29
申请号：US15816045
申请日：2017-11-17
Applicant: Allegro MicroSystems, LLC
Inventor： P. Karl Scheller , James E. Burgess , Steven E. Snyder , Kristann L. Moody , Devon Fernandez , Andrea Foletto
IPC: G01R33/00 , G01D5/244 , G01R23/00 , G01P21/02 , G01P3/488 , G01P3/44 , G01R33/06 , G01P13/00 , G01P3/487
Abstract: Systems, methods, and apparatuses for magnetic field sensors with self-test include a detection circuit to detect speed and direction of a target. One or more circuits to test accuracy of the detected speed and direction may be included. One or more circuits to test accuracy of an oscillator may also be included. One or more circuits to test the accuracy of an analog-to-digital converter may also be included. Additionally, one or more IDDQ and/or built-in-self test (BIST) circuits may be included.
-
Patent Agency Ranking
36.发明授权公开(公告)号：US09664748B2
公开(公告)日：2017-05-30
申请号：US14306722
申请日：2014-06-17
Applicant: Allegro MicroSystems, LLC
Inventor： Andreas P. Friedrich , Andrea Foletto , Jay M. Towne , Michael Morris , Eric Shoemaker
IPC: G01R33/02 , G01R33/06 , G01R33/07 , G01P3/48 , G01D5/244 , G01R33/09 , G01P3/487 , G01P3/488 , G01P13/04 , G01D5/245 , G01P3/489
CPC classification number: G01R33/02 , G01D5/24461 , G01D5/2457 , G01P3/4802 , G01P3/487 , G01P3/488 , G01P3/489 , G01P13/045 , G01R33/07 , G01R33/09
Abstract: A magnetic field sensor and associated method provide an output signal with first and second different pulses with first and second different pulse widths indicative of first and second different directions of rotation of a moving target. The magnetic field sensor also includes third pulses with an identifiable encoding to indicate when a signature region in the moving target proximate to the magnetic field sensor passes by the magnetic field sensor. The third pulses each comprise respective state transitions and each comprise respective pulse widths with respective fixed predetermined time durations.
-
37.发明授权Circuits and methods using a first cycle of a signal to generate a threshold signal used for comparing to a second later cycle of the signal 有权使用信号的第一周期的电路和方法来产生用于与信号的第二个后续周期进行比较的阈值信号公开(公告)号：US09140536B2
公开(公告)日：2015-09-22
申请号：US14061106
申请日：2013-10-23
Applicant: Allegro Microsystems, LLC
Inventor： Andrea Foletto , Andreas P. Friedrich
CPC classification number: G01B7/14 , G01D5/145 , G01D5/24476 , G01P3/488 , G01P3/489
Abstract: A circuit to detect a movement of an object provides a threshold selection module that uses one or more threshold signals identified during a first cycle of a proximity signal prior to a second different cycle of the magnetic field signal in order to establish a threshold signal used to compare with the second cycle of the magnetic field signal. A method associated with the circuit is also described.
Abstract translation: 用于检测对象的移动的电路提供阈值选择模块，其使用在磁场信号的第二不同周期之前在接近信号的第一周期期间识别的一个或多个阈值信号，以建立用于 与磁场信号的第二个周期进行比较。 还描述了与电路相关联的方法。
-
38.发明申请Magnetic Field Sensor and Associated Method That Can Establish a Measured Threshold Value and That Can Store the Measured Threshold Value in a Memory Device 有权磁场传感器和可以建立测量阈值的相关方法，并将可测量的阈值存储在存储器中公开(公告)号：US20140222364A1
公开(公告)日：2014-08-07
申请号：US14250574
申请日：2014-04-11
Applicant: ALLEGRO MICROSYSTEMS, LLC
Inventor： Andrea Foletto , Peter Cisar , Eric Shoemaker
CPC classification number: G01D5/145 , G01D5/142 , G01D5/2449 , G01D5/247 , G01D18/008 , G01P3/488
Abstract: A magnetic field sensor includes a true power on state (TPOS) detector for which a measured threshold value is stored prior to power down and recalled upon power up. A corresponding method is associated with the magnetic field sensor.
Abstract translation: 磁场传感器包括真正的通电状态（TPOS）检测器，在断电之前存储测量的阈值并在加电时调用。 相应的方法与磁场传感器相关联。
-
39.发明授权Motion sensor, method, and computer-readable storage medium providing a motion sensor with a validated output signal from the motion sensor 有权运动传感器，方法和计算机可读存储介质，其提供具有来自运动传感器的经验证的输出信号的运动传感器公开(公告)号：US08686720B2
公开(公告)日：2014-04-01
申请号：US13859251
申请日：2013-04-09
Applicant: Allegro Microsystems, LLC
Inventor： Andrea Foletto , Devon Fernandez , Eric Burdette
IPC: G01B7/30
CPC classification number: G01B7/00 , G01D5/24452 , G01D5/2448 , G01P3/487 , G01P3/488 , G01P3/489 , G01P21/00
Abstract: A motion sensor has an output protocol processor configured to provide a validated output signal after a determined time period, wherein the determined time period is extended if a vibration is detected.
Abstract translation: 运动传感器具有输出协议处理器，其被配置为在确定的时间段之后提供经过验证的输出信号，其中如果检测到振动，则所述确定的时间段被延长。
-
公开(公告)号：US12107528B2
公开(公告)日：2024-10-01
申请号：US18060670
申请日：2022-12-01
Applicant: Allegro MicroSystems, LLC
Inventor： Lu Wang , Masahira Kurihara , Kamyar Khosravi , Andrea Foletto
IPC: H02P6/18
CPC classification number: H02P6/183
Abstract: Methods and apparatus for motor control having low noise variable-high frequency signal injection for an electric motor. Different injection signals have different signal characteristics. One of the first and second injection signals is selected on a cycle-by-cycle basis as part of a direct voltage signal input to control an electric motor. The first and second signal characteristics are configured to reduce acoustic noise generated by an electric motor.
-
-
-
-
-
-
-
-
-
Search Results
75
records
(took 0.021 seconds)
