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公开(公告)号：US10884092B2
公开(公告)日：2021-01-05
申请号：US16214768
申请日：2018-12-10
Applicant: Allegro MicroSystems, LLC
Inventor： Nicolas Rigoni , Octavio H. Alpago , Nicolas Rafael Biberidis , Hernán D. Romero
Abstract: A magnetic field sensor includes a first magnetic field sensing element first generating a first signal having a first axis of maximum sensitivity, a second magnetic field sensing element for generating a second signal and having a second axis of maximum sensitivity, one or more detectors for receiving an output of the first magnetic field sensing element or the second magnetic field sensing element, and a processor that receives an output of the one or more detectors and uses the output of the one or more detectors to calculate a first constant Kc and a second constant Ks and then uses Kc and Ks to compensate for an orthogonality error between the first axis of maximum sensitivity and second axis of maximum sensitivity. The detectors include peak detectors and/or zero-crossing detectors that compare the output of the first input signal or the second input signal with a threshold or zero.
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公开(公告)号：US10852161B2
公开(公告)日：2020-12-01
申请号：US16398522
申请日：2019-04-30
Applicant: Allegro MicroSystems, LLC
Inventor： Juan Manuel Cesaretti , Nicolas Rigoni , Jesse Lapomardo
Abstract: A magnetic field sensor that detects an angle of a target includes a first channel having first and second magnetic field sensing elements that are orthogonal with respect to each other and produce first and second magnetic field signals, and a second channel having third and fourth magnetic field sensing elements that are orthogonal with respect to each other and produce third and fourth magnetic field signals. The third sensing element is positioned at an angle (e.g., 45-degrees) with respect to the first sensing element. The magnetic field sensor includes a low power mode circuit that uses comparators to compare the first, second, third, and fourth magnetic field signals to a first, second, third, and fourth threshold, respectively. A processor is configured to use an output of the low power mode circuit to determine the angle of the target.
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公开(公告)号：US11703314B2
公开(公告)日：2023-07-18
申请号：US16887898
申请日：2020-05-29
Applicant: Allegro MicroSystems, LLC
Inventor： Nicolas Rigoni , Octavio H. Alpago , Leandro Tozzi
CPC classification number: G01B7/30 , G01R33/0094
Abstract: An angle sensor comprising: a plurality of magnetic field sensing elements configured to detect a magnetic field and generate a respective plurality of analog magnetic field signals; a plurality of analog frontend circuits each analog frontend circuit associated with a respective magnetic field sensing element; and a digital feedback circuit configured to generate digital magnetic field signals from the plurality of analog magnetic field signals and generate digital error correction values, wherein the plurality of analog frontend circuits are configured to obtain the digital error correction values from the digital feedback circuit, generate analog correction values from the digital error correction values, and apply the analog correction values to the plurality of analog magnetic field signals to generate a plurality of corrected analog magnetic field signals.
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Patent Agency Ranking
公开(公告)号：US11333486B2
公开(公告)日：2022-05-17
申请号：US16593308
申请日：2019-10-04
Applicant: Allegro MicroSystems, LLC
Inventor： Nicolas Rigoni , Octavio H. Alpago
IPC: G01B9/02055 , G01B7/30 , G01R1/00
Abstract: An angle sensor can have a plurality of magnetic field sensing elements configured to detect a magnetic field and generate a respective plurality of magnetic field signals. In response to these magnetic field signals, a processor generates an uncorrected angle signal that is indicative of an angle of the magnetic field. An error corrector generates an error value using one or more of the previous samples of the uncorrected angle signal, and a summation element applies the error value to a current sample of the uncorrected angle signal to generate a corrected angle signal. The error corrector can generate the error value by applying a correction factor to a previous sample of the uncorrected angle signal, or by applying a correction factor to a predicted current sample of the uncorrected angle signal.
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公开(公告)号：US20210294694A1
公开(公告)日：2021-09-23
申请号：US16821155
申请日：2020-03-17
Applicant: Allegro MicroSystems, LLC
Inventor： Nicolas Rigoni , Nicolás Rafael Biberidis , Ahmed Hassan Fahmy , Octavio H. Alpago
Abstract: A method is disclosed for use in an electronic device having a non-volatile storage device and a volatile storage device, the method comprising: retrieving a first encoded data packet from a first address in the non-volatile storage device; decoding the first encoded data packet to obtain a first data item and a first error code corresponding to the first data item, the first encoded data packet being decoded by using a first coding key that is associated with the first address; detecting whether the first data item is corrupt based on the first error code and an error correction function, storing the first data item at a first address in the volatile storage device when the first data item is not corrupt, and transitioning the electronic device into a safe state when the first data item is corrupt.
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公开(公告)号：US11055165B2
公开(公告)日：2021-07-06
申请号：US16695968
申请日：2019-11-26
Applicant: Allegro MicroSystems, LLC
Inventor： Nicolas Rigoni , Fernando Orge , Lucas Intile , Nicolás Rafael Biberidis , Leandro Tozzi
Abstract: In one aspect, an integrated circuit (IC) includes a multiplexor configured to receive data from a non-volatile memory and configured to receive data from a shadow memory, a shift register configured to generate a first signature from the data received from the non-volatile memory and configured to generate a second signature from the data received from the shadow memory; a signature storage configured to store the first signature; and a shadow memory checking controller configured to enable the multiplexor to send the data from the non-volatile memory to the shift register, and send a command to reload the shadow memory with data from the non-volatile memory in response to receiving an error flag. The IC also includes a comparator circuit configured to compare the first signature and the second signature and configured to send the error flag in response to the first signature and the second signature being different.
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公开(公告)号：US20200020412A1
公开(公告)日：2020-01-16
申请号：US16033722
申请日：2018-07-12
Applicant: Allegro MicroSystems, LLC
Inventor： Nicolas Rafael Biberidis , Octavio H. Alpago , Nicolas Rigoni
Abstract: A method for multi-level memory safety for a sensor integrated circuit can include loading a blocking bit into a volatile memory from a non-volatile memory and providing the blocking bit to a gating circuit from the volatile memory. Further, the method may include the gating circuit determining whether to provide a default value to a functional logic based upon the provided blocking bit.
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公开(公告)号：US10325836B1
公开(公告)日：2019-06-18
申请号：US16034660
申请日：2018-07-13
Applicant: Allegro MicroSystems, LLC
Inventor： Nicolas Rigoni , Juan Manuel Cesaretti , Brian Bernier
IPC: H01L23/495 , H01L23/31 , H03K17/567 , H01L23/00 , H01L23/055 , H03K5/24 , H01L21/66
Abstract: An integrated circuit with transmission line error detection comprises a substrate, a package enclosing the substrate, a lead extending from the inside of the package to the outside of the package, and a circuit supported by the substrate. The circuit includes an input circuit and an output circuit. A first wire is coupled between the output circuit and the lead and a second wire is coupled between the lead and the input circuit so that the input circuit receives a signal generated by the output circuit after the signal has been transmitted across the first and second wires.
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