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公开(公告)号：US20200025837A1
公开(公告)日：2020-01-23
申请号：US16040716
申请日：2018-07-20
Applicant: Allegro MicroSystems, LLC
Inventor： Ezequiel Rubinsztain , Pablo Javier Bolsinger
Abstract: A sensor includes an output circuit configured to generate a sensor output signal based on an input signal having a logic high or low level, as may be provided by a Schmitt trigger circuit. During normal operation, the output switches between a first percentage of the supply voltage for logic high and a second percentage of the supply voltage for logic low. To convey a failure at the output, an output signal is output as either ground or the supply voltage when a fault is detected. As such, a fault can be communicated any time the output voltage is not equal to the first percentage or the second percentage of the supply voltage.
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公开(公告)号：US10006970B2
公开(公告)日：2018-06-26
申请号：US14661042
申请日：2015-03-18
Applicant: Allegro MicroSystems, LLC
Inventor： Manuel Rivas , Juan Manuel Cesaretti , Pablo Javier Bolsinger
CPC classification number: G01R33/0023 , G01R33/07 , G01R33/09 , H03K5/125
Abstract: An electronic comparison circuit can identify at least three conditions of an input signal received by the electronic comparison circuit. A first one of the at least three conditions occurs when a value of the input signal is less than a first threshold value, a second one of the at least three conditions occurs when a value of the input signal is greater than the first threshold value and less than a second threshold value, and a third one of the at least three conditions occurs when a value of the input signal is greater than the second threshold value. A magnetic field sensor can use the electronic comparison circuit.
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公开(公告)号：US20200309866A1
公开(公告)日：2020-10-01
申请号：US16901103
申请日：2020-06-15
Applicant: Allegro MicroSystems, LLC
Inventor： Ezequiel Rubinsztain , Pablo Javier Bolsinger
Abstract: A sensor includes an output circuit configured to generate a sensor output signal based on an input signal having a logic high or low level, as may be provided by a Schmitt trigger circuit. During normal operation, the output switches between a first percentage of the supply voltage for logic high and a second percentage of the supply voltage for logic low. To convey a failure at the output, an output signal is output as either ground or the supply voltage when a fault is detected. As such, a fault can be communicated any time the output voltage is not equal to the first percentage or the second percentage of the supply voltage.
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公开(公告)号：US11848682B2
公开(公告)日：2023-12-19
申请号：US17647639
申请日：2022-01-11
Applicant: Allegro MicroSystems, LLC
Inventor： Ezequiel Rubinsztain , Pablo Javier Bolsinger , Juan Manuel Cesaretti
CPC classification number: H03M1/188 , H03M1/1245 , H03M1/181 , H03M1/0621
Abstract: Apparatus includes an ADC configured to convert an analog signal to a digital signal, a comparator having a first input responsive to the analog signal, a second input responsive to the digital signal, and an output at which a comparison signal is provided, and an output checker configured to process the comparison signal to generate a fault signal indicative of whether a fault has occurred in the ADC. The comparator can be an analog comparator in which case the digital signal is converted to an analog signal for the comparison or a digital comparator in which case an additional ADC is provided to convert the analog signal into a digital signal for the comparison. Embodiments include more than one ADC in which case summation elements are provided to sum the analog signals and the digital signals for the comparison.
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公开(公告)号：US11768259B1
公开(公告)日：2023-09-26
申请号：US17930463
申请日：2022-09-08
Applicant: Allegro MicroSystems, LLC
Inventor： Ezequiel Rubinsztain , Pablo Javier Bolsinger
CPC classification number: G01R33/07 , G01R33/0041 , H03F3/45977
Abstract: A multichannel magnetic field sensor including a plurality of magnetic field sensing elements includes a multiplexed signal path. A front end amplifier is coupled to receive a first magnetic field signal during a first time interval and a second magnetic field signal during a second time interval. A first low pass filter processes the amplified signal during the first time interval and a second low pass filter processes the amplified signal during the second time interval. A sinc filter is coupled to receive the first low pass filtered signal during the first time interval and the second low pass filtered signal during the second time interval. A Schmitt trigger circuit includes a comparator to process the sinc filter output signal and to generate a first comparator output signal during the first time interval and a second comparator output signal is provided during the second time interval.
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Patent Agency Ranking
公开(公告)号：US20210247213A1
公开(公告)日：2021-08-12
申请号：US16787326
申请日：2020-02-11
Applicant: Allegro MicroSystems, LLC
Inventor： Ryan J. Metivier , Pablo Javier Bolsinger
Abstract: A magnetic field sensor includes one or more magnetic field sensing elements operable to generate a respective one or more magnetic field signals indicative of a magnetic field associated with an object, and one or more channel detector circuits coupled to receive one or more of the one or more magnetic field signals. The one or more channel detector circuits are configured to generate a respective one or more channel signals. The sensor also includes an output protocol circuit coupled to receive the one or more channel signals. The output protocol circuit is configured to generate a sensor output signal comprising distinguishable constant current levels associated with the one or more channel signals.
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公开(公告)号：US20220196739A1
公开(公告)日：2022-06-23
申请号：US17130161
申请日：2020-12-22
Applicant: Allegro MicroSystems, LLC
Inventor： Ezequiel Rubinsztain , Pablo Javier Bolsinger
IPC: G01R31/3185 , G01R31/319
Abstract: A method for testing a signal path in a sensor, the signal path including a filter circuit and a comparator circuit, the method including: closing a first signal line that is arranged to bypass a first capacitor in the filter circuit; injecting a test signal into the signal path after the first signal line is closed; and detecting whether a signal that is output by the comparator circuit in response to the test signal satisfies a predetermined condition.
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公开(公告)号：US10908230B2
公开(公告)日：2021-02-02
申请号：US16901103
申请日：2020-06-15
Applicant: Allegro MicroSystems, LLC
Inventor： Ezequiel Rubinsztain , Pablo Javier Bolsinger
Abstract: A sensor includes an output circuit configured to generate a sensor output signal based on an input signal having a logic high or low level, as may be provided by a Schmitt trigger circuit. During normal operation, the output switches between a first percentage of the supply voltage for logic high and a second percentage of the supply voltage for logic low. To convey a failure at the output, an output signal is output as either ground or the supply voltage when a fault is detected. As such, a fault can be communicated any time the output voltage is not equal to the first percentage or the second percentage of the supply voltage.
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公开(公告)号：US20190391212A1
公开(公告)日：2019-12-26
申请号：US16014075
申请日：2018-06-21
Applicant: Allegro MicroSystems, LLC
Inventor： Ezequiel Rubinsztain , Pablo Javier Bolsinger
Abstract: Apparatus and methods provide an output signal indicative of a failure of a filter circuit and/or a Schmitt trigger circuit of a magnetic field sensor. A magnetic field sensor includes one or more magnetic field sensing elements that generate a magnetic field signal, a filter circuit that filters the magnetic field signal, a Schmitt trigger circuit that compares the filtered signal to a Schmitt trigger threshold during a first time period, and a diagnostic circuit coupled to the filter circuit that compares the Schmitt trigger threshold to a diagnostic threshold during a second time period that does not overlap with the first time period. An output signal indicative of a failure is output when the diagnostic threshold is greater than a predetermined percentage or absolute value above or below the Schmitt trigger threshold.
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公开(公告)号：US20230223949A1
公开(公告)日：2023-07-13
申请号：US17647639
申请日：2022-01-11
Applicant: Allegro MicroSystems, LLC
Inventor： Ezequiel Rubinsztain , Pablo Javier Bolsinger , Juan Manuel Cesaretti
CPC classification number: H03M1/188 , H03M1/1245 , H03M1/181
Abstract: Apparatus includes an ADC configured to convert an analog signal to a digital signal, a comparator having a first input responsive to the analog signal, a second input responsive to the digital signal, and an output at which a comparison signal is provided, and an output checker configured to process the comparison signal to generate a fault signal indicative of whether a fault has occurred in the ADC. The comparator can be an analog comparator in which case the digital signal is converted to an analog signal for the comparison or a digital comparator in which case an additional ADC is provided to convert the analog signal into a digital signal for the comparison. Embodiments include more than one ADC in which case summation elements are provided to sum the analog signals and the digital signals for the comparison.
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