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公开(公告)号：US20230152393A1
公开(公告)日：2023-05-18
申请号：US17525224
申请日：2021-11-12
Applicant: Allegro MicroSystems, LLC
Inventor： David J. Haas , Hernán D. Romero
CPC classification number: G01R33/0023 , G01D9/00
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：US10580289B2
公开(公告)日：2020-03-03
申请号：US16444347
申请日：2019-06-18
Applicant: Allegro MicroSystems, LLC
Inventor： David J. Haas , Juan Manuel Cesaretti , William P. Taylor
IPC: G01R35/00 , G08B29/14 , G01D3/08 , G01R33/00 , G01R33/07 , G08B21/18 , G08B29/18 , H04L25/49 , G01R33/09 , 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：US20200049760A1
公开(公告)日：2020-02-13
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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公开(公告)号：US10120041B2
公开(公告)日：2018-11-06
申请号：US14670453
申请日：2015-03-27
Applicant: Allegro Microsystems, LLC
Inventor： David J. Haas , Michael Gaboury , Alexander Latham
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.
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公开(公告)号：US11303257B2
公开(公告)日：2022-04-12
申请号：US16365855
申请日：2019-03-27
Applicant: Allegro MicroSystems, LLC
Inventor： Steven Daubert , David J. Haas , Craig S. Petrie , Milan Valenta , Roman Prochazka , Richard Stary , Sina Haji Alizad
Abstract: A current sensor integrated circuit to sense a current through a resistor includes a substrate, a tub disposed in the substrate, an analog front end disposed in the tub and comprising an amplifier having inputs coupled across the resistor and a charging circuit configured to bias the analog front end and the tub to a bias voltage that is a predetermined offset voltage greater than a common mode voltage associated with the resistor. In embodiments, the analog front end is biased to a first bias voltage and the tub is biased to a second, different bias voltage.
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Patent Agency Ranking
公开(公告)号：US20200313637A1
公开(公告)日：2020-10-01
申请号：US16365855
申请日：2019-03-27
Applicant: Allegro MicroSystems, LLC
Inventor： Steven Daubert , David J. Haas , Craig S. Petrie , Milan Valenta , Roman Prochazka , Richard Stary , Sina Haji Alizad
Abstract: A current sensor integrated circuit to sense a current through a resistor includes a substrate, a tub disposed in the substrate, an analog front end disposed in the tub and comprising an amplifier having inputs coupled across the resistor and a charging circuit configured to bias the analog front end and the tub to a bias voltage that is a predetermined offset voltage greater than a common mode voltage associated with the resistor. In embodiments, the analog front end is biased to a first bias voltage and the tub is biased to a second, different bias voltage.
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7.发明申请公开(公告)号：US20190362619A1
公开(公告)日：2019-11-28
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：US10234516B2
公开(公告)日：2019-03-19
申请号：US15989323
申请日：2018-05-25
Applicant: Allegro MicroSystems, LLC
Inventor： David J. Haas , Michael Gaboury , Alexander Latham
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.
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公开(公告)号：US20180365974A1
公开(公告)日：2018-12-20
申请号：US15622459
申请日：2017-06-14
Applicant: Allegro MicroSystems, LLC
Inventor： David J. Haas , Juan Manuel Cesaretti
CPC classification number: G08B29/14 , G01D3/08 , G01R31/2829 , G01R33/0023 , G01R33/07 , G01R33/09 , G08B21/182 , G08B29/185 , H04L25/4902
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：US20150185293A1
公开(公告)日：2015-07-02
申请号：US14578800
申请日：2014-12-22
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.
Abstract translation: 用于提供具有驱动电流源，耦合到驱动电流源的磁感测元件，具有第一和第二差分输出的磁感测元件以及第一和第二电流元件的集成电路的方法和装置，以提供相对于 驱动电流源，其中所述第一电流元件耦合到所述第一差分输出，并且所述第二电流元件耦合到所述第二差分输出。 在说明性实施例中，IC输出可以输出对应于第一和第二电流元件的电流的电压。
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