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11.发明申请公开(公告)号：US20210116263A1
公开(公告)日：2021-04-22
申请号：US16657032
申请日：2019-10-18
Applicant: Allegro MicroSystems, LLC
Inventor： Pablo Aguirre , Juan Manuel Cesaretti , Jesse Lapomardo
Abstract: A magnetic field sensor includes an analog front end having first and second magnetic field sensing elements arranged at approximately 90-degrees with respect to each other, a pre-processor and an arctangent processor. The first and second magnetic field sensing elements are arranged in a sideshaft orientation with respect to a rotating object and offset with respect to an axis of rotation of the rotating object, the rotating object having a radial axis and a tangential axis. The pre-processor is configured to receive the first and second magnetic field signals from the analog front end and to apply a correction factor to one or both of the first and second magnetic field signals to produce first and second scaled magnetic field signals. The arctangent processor is configured to calculate an arctangent value of the first and second scaled magnetic field signals.
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公开(公告)号：US20200348150A1
公开(公告)日：2020-11-05
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：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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14.发明申请公开(公告)号：US20190018074A1
公开(公告)日：2019-01-17
申请号：US16132653
申请日：2018-09-17
Applicant: Allegro MicroSystems, LLC
Inventor： Juan Manuel Cesaretti
IPC: G01R33/00 , G01R33/09 , H01L21/02 , G01R27/08 , G01L1/22 , H01L43/04 , H01L49/02 , H01L27/22 , G01R33/07 , H01L43/06
Abstract: The present disclosure is directed to an electronic circuit having a Hall effect element and a resistor bridge, all disposed over a common semiconductor substrate. The resistor bridge includes a first set of resistive elements having a first vertical epitaxial resistor and a first lateral epitaxial resistor coupled in series, and a second set of resistive elements having a second vertical epitaxial resistor and a second lateral epitaxial resistor coupled in series. The first set of resistive elements and the second set of resistive elements can be coupled in parallel. The resistor bridge can be configured to sense a stress value of the Hall effect element.
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15.发明授权公开(公告)号：US10162017B2
公开(公告)日：2018-12-25
申请号：US15207903
申请日：2016-07-12
Applicant: Allegro MicroSystems, LLC
Inventor： Juan Manuel Cesaretti
Abstract: The systems and methods described can reduce high order temperature coefficients on the Hall plate sensitivity. A temperature coefficient circuit may include a first amplifier to receive a first reference voltage generated in conjunction with a proportional to absolute temperature (PTAT) device and a second amplifier to receive a second reference voltage generated in conjunction with a complementary to absolute temperature (CTAT) device, the second amplifier having a second output node. A plurality of resistors may be disposed in a signal path between output node of the first amplifier and an output node of the second amplifier. The plurality of resistors may be coupled to at least one voltage-to-current converter through one or more resistors taps. The voltage-to-current converter may generate at least one current signal that can be operable to apply a multiplication factor or a division divisor to an amplifier coupled to the voltage-to-current converter.
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Patent Agency Ranking
16.发明授权公开(公告)号：US09638764B2
公开(公告)日：2017-05-02
申请号：US14681575
申请日：2015-04-08
Applicant: Allegro MicroSystems, LLC
Inventor： Juan Manuel Cesaretti , Aaron Cook
CPC classification number: G01R33/0023 , G01R33/0041 , G01R33/0052 , G01R33/07 , G01R33/075
Abstract: An electronic circuit can be disposed upon a semiconductor substrate. An epitaxial layer can be disposed over the semiconductor substrate. The electronic circuit can include a Hall effect element, at least a portion of the Hall effect element disposed in the epitaxial layer. The electronic circuit can further include a current generator configured to generate a drive current that passes through the Hall effect element. The current generator can include a resistor disposed in the epitaxial layer and having characteristics such that a resistance of the resistor can vary with a stress of the semiconductor substrate, resulting in changes of the drive current, to compensate for variations in the sensitivity of the Hall effect element with the stress of the substrate.
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17.发明申请公开(公告)号：US20170030979A1
公开(公告)日：2017-02-02
申请号：US14812313
申请日：2015-07-29
Applicant: Allegro MicroSystems, LLC
Inventor： Juan Manuel Cesaretti
CPC classification number: G01R33/0035 , G01R33/0017 , G01R33/07
Abstract: A magnetic field sensor and a method include a modulator coupled in a feedback arrangement and operable to modulate a calibration feedback signal with a modulator clock signal having a selected frequency and a selected relative phase operable to remove a gain error in the magnetic field sensor and in the method.
Abstract translation: 磁场传感器和方法包括以反馈装置耦合并且可操作以用具有选定频率的调制器时钟信号和所选相对相位调制校准反馈信号的调制器，该调制器时钟信号可操作以去除磁场传感器中的增益误差 方法。
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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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19.发明授权公开(公告)号：US10929252B2
公开(公告)日：2021-02-23
申请号：US16540409
申请日：2019-08-14
Applicant: Allegro MicroSystems, LLC
Inventor： Juan Manuel Cesaretti , Alejandro Gabriel Milesi
Abstract: A data storage circuit for storing data from volatile memory in response to a power loss, the data storage circuit including an input for receiving a power loss signal in response to a power loss from at least one power source, an input configured to receive data from a volatile memory, a single block of non-volatile matrix of memory cells and a driver circuit coupled to said single row of non-volatile matrix of memory cells. The driver circuit is configured to write data to and read data from said single block of non-volatile matrix of memory cells. The single block of non-volatile matrix of memory cells can be provided as a single row electrically erasable programmable read only memory (EEPROM).
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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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