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公开(公告)号：US12174271B2
公开(公告)日：2024-12-24
申请号：US17525224
申请日：2021-11-12
Applicant: Allegro MicroSystems, LLC
Inventor： David J. Haas , Hernán D. Romero
Abstract: A method is provided for use in a sensor, the method comprising: selecting a switching cycle for the sensor; transitioning the sensor into a state in which at least one component of the sensor is periodically turned on and off in accordance with the switching cycle; sampling an analog signal to generate a sampled signal, the analog signal being generated by at least one sensing element, the analog signal being sampled only during periods in which the at least one component of the sensor is turned on; and generating an output signal based, at least in part, on the sampled signal and outputting the output signal.
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公开(公告)号：US20220155387A1
公开(公告)日：2022-05-19
申请号：US16951324
申请日：2020-11-18
Applicant: Allegro MicroSystems, LLC
Inventor： Craig S. Petrie , Hernán D. Romero , David J. Haas
Abstract: A magnetic field sensor includes a current source configured to generate a bias current, a plurality of magnetic field transducers, each having power terminals coupled to the current source and output terminals at which an output signal of the transducer is provided, wherein the power terminals of each of the plurality of magnetic field transducers are electrically coupled together in series so that the bias current flows through each of the plurality of magnetic field transducers in series. A capacitively-coupled summing amplifier has a plurality of inputs, each configured to receive the output signal of a respective one of the plurality of magnetic field transducers, and an output at which an amplified and summed signal is provided, wherein the capacitively-coupled summing amplifier is configured to amplify and sum the received output signals of the plurality of magnetic field transducers.
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13.发明授权公开(公告)号：US10692362B2
公开(公告)日：2020-06-23
申请号：US16516600
申请日：2019-07-19
Applicant: Allegro MicroSystems, LLC
Inventor： Craig S. Petrie , Akshay Pai , David J. Haas
Abstract: A sensor integrated circuit includes a main processing channel that responds to an input signal by generating a first processed signal from the input signal. Also included is a diagnostic processing channel that responds to the input signal by generating a second processed signal from the input signal. The main processing channel has a first response to disturbances and the diagnostic processing channel has a second response to disturbances that is slower than the first response of the main processing channel. A checker circuit in the sensor integrated circuit detects faults in the sensor IC and generates a fault signal when the first processed signal and the second processed signal differ from each other by more than a threshold amount.
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公开(公告)号：US11408945B2
公开(公告)日：2022-08-09
申请号：US16951324
申请日：2020-11-18
Applicant: Allegro MicroSystems, LLC
Inventor： Craig S. Petrie , Hernán D. Romero , David J. Haas
Abstract: A magnetic field sensor includes a current source configured to generate a bias current, a plurality of magnetic field transducers, each having power terminals coupled to the current source and output terminals at which an output signal of the transducer is provided, wherein the power terminals of each of the plurality of magnetic field transducers are electrically coupled together in series so that the bias current flows through each of the plurality of magnetic field transducers in series. A capacitively-coupled summing amplifier has a plurality of inputs, each configured to receive the output signal of a respective one of the plurality of magnetic field transducers, and an output at which an amplified and summed signal is provided, wherein the capacitively-coupled summing amplifier is configured to amplify and sum the received output signals of the plurality of magnetic field transducers.
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公开(公告)号：US11313899B2
公开(公告)日：2022-04-26
申请号：US16655657
申请日：2019-10-17
Applicant: Allegro MicroSystems, LLC
Inventor： Shaun D. Milano , Georges El Bacha , Michael C. Doogue , David J. Haas , Gregory Delmain , Michael Gaboury , William P. Taylor
Abstract: Methods and apparatus for providing an integrated circuit having a drive current source, a magnetic sensing element coupled to the drive current source, the magnetic sensing element having first and second differential outputs, and first and second current elements to provide respective currents in relation to the drive current source, wherein the first current element is coupled to the first differential output and the second current element is coupled to the second differential output. In illustrative embodiments, an IC output can output a voltage corresponding to the currents of the first and second current elements.
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Patent Agency Ranking
公开(公告)号：US20190392702A1
公开(公告)日：2019-12-26
申请号：US16444347
申请日：2019-06-18
Applicant: Allegro MicroSystems, LLC
Inventor： David J. Haas , Juan Manuel Cesaretti , William P. Taylor
Abstract: A sensor integrated circuit includes at least two processing channels responsive to the same or different analog input signals to generate respective processed signals. The two processing channels are non-homogenous and, in some embodiments have different processing accuracies. A checker circuit receives the first and second processed signals and is configured to detect a fault in the sensor integrated circuit when the first and second processed signals differ from each other by more than a predetermined amount.
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公开(公告)号：US20170016965A1
公开(公告)日：2017-01-19
申请号：US14801997
申请日：2015-07-17
Applicant: ALLEGRO MICROSYSTEMS, LLC
Inventor： Virag V. Chaware , Jesse Lapomardo , David J. Haas
CPC classification number: G01R33/0023 , G01R33/0017 , G01R33/0035 , G01R33/07
Abstract: Method and apparatus for trimming a magnetic field sensor having a first magnetic field sensing element. In embodiments, trimming includes the use of a curve for normalized sensitivity of the first magnetic field sensing element derived from a first curve corresponding to current through a coil in a first direction at a first time to produce a field affecting the first magnetic field sensing element versus an external field and a second curve corresponding to current through the coil in a second direction opposite to the first direction at a second time to produce a field affecting the first magnetic field sensing element versus an external field.
Abstract translation: 用于修整具有第一磁场感测元件的磁场传感器的方法和装置。 在实施例中，修整包括使用第一磁场感测元件的归一化灵敏度的曲线，该第一磁场感测元件在与第一曲线相对应的第一曲线的第一时间沿第一方向产生的电流产生影响第一磁场感测元件的场 相对于在第二时间处于与第一方向相反的第二方向上的通过线圈的电流的外部场和第二曲线，以产生影响第一磁场感测元件相对于外部场的场。
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公开(公告)号：US20160282425A1
公开(公告)日：2016-09-29
申请号：US14670453
申请日：2015-03-27
Applicant: Allegro Microsystems, LLC
Inventor： David J. Haas , Michael Gaboury , Alexander Latham
CPC classification number: G01R33/072 , G01R15/202 , G01R19/0092 , G01R33/0017 , G01R33/0035 , G01R33/07 , G01R33/075
Abstract: In one aspect, a magnetic field sensor includes a chopper stabilized amplifier and a plurality of Hall-type elements in parallel and connected to the chopper stabilized amplifier. In another aspect, a magnetic field sensor includes a chopper stabilized amplifier and a plurality of Hall quad elements in parallel and connected to the chopper stabilized amplifier. In a further aspect, a current sensor has a bandwidth of 1 MHz and includes a chopper stabilized amplifier and a plurality of Hall quad elements, fabricated in silicon, in parallel and connected to the chopper stabilized amplifier.
Abstract translation: 一方面，磁场传感器包括并联的斩波稳定放大器和多个霍尔型元件，并连接到斩波稳定放大器。 另一方面，磁场传感器包括斩波稳定放大器和并联的多个霍尔四边形元件，并连接到斩波稳定放大器。 在另一方面，电流传感器具有1MHz的带宽，并且包括并联并连接到斩波稳定放大器的斩波稳定放大器和制造在硅中的多个霍尔四边形元件。
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公开(公告)号：US10380879B2
公开(公告)日：2019-08-13
申请号：US15622459
申请日：2017-06-14
Applicant: Allegro MicroSystems, LLC
Inventor： David J. Haas , Juan Manuel Cesaretti
IPC: G06F11/00 , G08B29/14 , G01D3/08 , G01R33/00 , G01R33/07 , G01R33/09 , G08B21/18 , G08B29/18 , H04L25/49 , G01R31/28
Abstract: A sensor integrated circuit includes at least two processing channels responsive to the same or different analog input signals to generate respective processed signals. The two processing channels are non-homogenous and, in some embodiments have different processing accuracies. A checker circuit receives the first and second processed signals and is configured to detect a fault in the sensor integrated circuit when the first and second processed signals differ from each other by more than a predetermined amount.
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公开(公告)号：US20180367073A1
公开(公告)日：2018-12-20
申请号：US15697846
申请日：2017-09-07
Applicant: Allegro MicroSystems, LLC
Inventor： David J. Haas
Abstract: A motor control system includes an estimator responsive to measured motor winding voltage and measured motor winding current to generate an estimated position signal indicative of an estimate of a position of the motor and/or an estimated speed signal indicative of an estimate of a speed of the motor. A diagnostic checker circuit compares the estimated position signal and/or the estimated speed signal to a respective one of an actual position of the motor or an actual speed of the motor.
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