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公开(公告)号：US20190383885A1
公开(公告)日：2019-12-19
申请号：US16010969
申请日：2018-06-18
Applicant: Allegro MicroSystems, LLC
Inventor： Timothy Sitorus , Eric G. Shoemaker
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.
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2.发明申请CIRCUITS AND METHODS FOR MODULATING CURRENT IN CIRCUITS COMPRISING SENSING ELEMENTS 有权用于调节包含传感元件的电路中的电流的电路和方法公开(公告)号：US20160313407A1
公开(公告)日：2016-10-27
申请号：US14696674
申请日：2015-04-27
Applicant: ALLEGRO MICROSYSTEMS, LLC
Inventor： Jay M. Towne , P. Karl Scheller , Eric G. Shoemaker
CPC classification number: G01R33/0041 , G01D5/145 , G01R33/0029 , G01R33/07 , G01R33/09 , H03F1/0216 , H03G1/0035
Abstract: A circuit includes a current source having at least first terminal and a second, control terminal. The current source is configured to receive a current control signal at the control terminal and in response thereto generates a first current signal at the first terminal. The current control signal controls a current level of the first current signal. The circuit also includes at least one sensing element responsive to one or more sense parameters and having an input adapted to couple to the first terminal of said current source. The sensing element is configured to receive one or more current signals comprising at least the first current signal and in response thereto generates a sensed output signal at an output thereof. A corresponding method for operating the circuit is also provided.
Abstract translation: 电路包括至少具有第一端子和第二控制端子的电流源。 电流源被配置为在控制终端处接收电流控制信号，并响应于此，在第一终端产生第一电流信号。 电流控制信号控制第一电流信号的电流电平。 电路还包括响应于一个或多个感测参数并且具有适于耦合到所述电流源的第一端子的输入的至少一个感测元件。 感测元件被配置为接收包括至少第一电流信号的一个或多个电流信号，并且作为响应，感测元件在其输出处产生感测的输出信号。 还提供了用于操作电路的相应方法。
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公开(公告)号：US20190383886A1
公开(公告)日：2019-12-19
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.
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公开(公告)号：US20190049527A1
公开(公告)日：2019-02-14
申请号：US16165464
申请日：2018-10-19
Applicant: Allegro MicroSystems, LLC
Inventor： Ravi Vig , William P. Taylor , Andreas P. Friedrich , Paul A. David , Marie-Adelaide Lo , Eric Burdette , Eric G. Shoemaker , Michael C. Doogue
Abstract: A magnetic field sensor includes a lead frame, a passive component, semiconductor die supporting a magnetic field sensing element and attached to the lead frame, a non-conductive mold material enclosing the die and at least a portion of the lead frame, and a ferromagnetic mold material secured to a portion of the non-conductive mold material. The lead frame has a recessed region and the passive component is positioned in the recessed region. The ferromagnetic mold material may comprise a soft ferromagnetic material to form a concentrator or a hard ferromagnetic material to form a bias magnet.
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公开(公告)号：US20180224300A1
公开(公告)日：2018-08-09
申请号：US15945085
申请日：2018-04-04
Applicant: Allegro MicroSystems, LLC
Inventor： Ravi Vig , Paul A. David , Eric G. Shoemaker
IPC: G01D5/14
Abstract: Magnetic field sensors can sense speed of movement and direction of movement of a ferromagnetic object. The magnetic field sensors employ both planar Hall effect elements and vertical Hall effect elements to generate two-state signals in two different signal paths with relative phases that are ninety degrees apart, the ninety degrees having sufficient margin to aid in detection of the direction of motion. Other magnetic field sensors use at least four vertical Hall effect elements to identify a speed of rotation and a direction of rotation of a moving ferromagnetic object.
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Patent Agency Ranking
6.发明授权公开(公告)号：US10411498B2
公开(公告)日：2019-09-10
申请号：US15269097
申请日：2016-09-19
Applicant: Allegro MicroSystems, LLC
Inventor： Eric G. Shoemaker , P. Karl Scheller , Devon Fernandez
IPC: H02J7/34 , H01L23/495 , G01D11/00
Abstract: A sensor integrated circuit includes an energy storage device having a first terminal coupled to a functional circuit and a blocking circuit coupled between a power supply pin and the first terminal of the energy storage device. The blocking circuit permits the energy storage device to store energy from an external power supply coupled to the power pin. The first terminal of the energy storage device is inaccessible from outside of the sensor IC. Additional features of the sensor IC can include a high regulator, a low regulator, and a low power circuit.
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公开(公告)号：US10088533B2
公开(公告)日：2018-10-02
申请号：US14993495
申请日：2016-01-12
Applicant: Allegro Microsystems, LLC
Inventor： Manuel Rivas , Gerardo A. Monreal , Christine M. Graham , Eric G. Shoemaker
IPC: B60Q3/80 , G01R33/06 , G01R33/07 , G06F3/046 , G01R33/00 , G05F3/08 , H05B33/08 , B60Q3/20 , B60Q3/30
Abstract: An integrated magnetic field sensor includes a magnetic field sensing circuit and a power driving circuit disposed upon or within a common substrate. A method of powering on and off a load uses the above integrated magnetic field sensor.
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公开(公告)号：US20180259594A1
公开(公告)日：2018-09-13
申请号：US15975942
申请日：2018-05-10
Applicant: Allegro MicroSystems, LLC
Inventor： Devon Fernandez , Eric G. Shoemaker , Michael Morris , Dominik Weiland
CPC classification number: G01R33/0082 , G01D3/0365 , G01D5/147 , G01D5/2448 , G01D5/24485 , G01D5/2449 , G01R1/44 , G01R33/02
Abstract: A magnetic field sensor includes one or more magnetic field sensing elements configured to generate a magnetic field signal responsive to a magnetic field and a detector coupled to receive an interpolated threshold and a signal representative of the magnetic field signal, wherein the detector is configured to compare the interpolated threshold with the signal representative of the magnetic field signal to generate a detector output signal. A memory is configured to store a first threshold value indicative of a threshold value at a first temperature and a second threshold value indicative of a threshold value at a second temperature lower than the first temperature and a threshold module coupled to the memory and configured to generate the interpolated threshold based on the stored first and second threshold values.
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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.
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公开(公告)号：US10041810B2
公开(公告)日：2018-08-07
申请号：US15176665
申请日：2016-06-08
Applicant: Allegro MicroSystems, LLC
Inventor： Ravi Vig , Paul A. David , Eric G. Shoemaker
Abstract: Magnetic field sensors can sense speed of movement and direction of movement of a ferromagnetic object. The magnetic field sensors employ both planar Hall effect elements and vertical Hall effect elements to generate two-state signals in two different signal paths with relative phases that are ninety degrees apart, the ninety degrees having sufficient margin to aid in detection of the direction of motion. Other magnetic field sensors use at least four vertical Hall effect elements to identify a speed of rotation and a direction of rotation of a moving ferromagnetic object.
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