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Patent Agency Ranking
公开(公告)号：US12176862B2
公开(公告)日：2024-12-24
申请号：US18051934
申请日：2022-11-02
Applicant: Allegro MicroSystems, LLC
Inventor： Hernán D. Romero , Pablo Aguirre
Abstract: An amplifier circuits inductive/magnetic sensor interface can include a main signal path including one or more amplifiers configured to receive an input signal and to produce an output signal based on the input signal. The input signal may include a square-wave demodulated signal having an associated modulation frequency and an undesired frequency component at twice the modulation frequency of the square-wave demodulated signal. The amplifier circuit may include a gain feedback loop configured to set a gain of the amplifier circuit. The amplifier circuit may include a ripple reduction feedback loop configured to receive an intermediate signal on the main signal path and extract the undesired frequency component of the intermediate signal to produce a filtered version of the intermediate signal and provide the filtered version of the intermediate signal to the main signal path.
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公开(公告)号：US20240385015A1
公开(公告)日：2024-11-21
申请号：US18318029
申请日：2023-05-16
Applicant: Allegro MicroSystems, LLC
Inventor： Pablo Aguirre , Hernán D. Romero
Abstract: In one example, an inductive sensor interface circuit includes: a coil driver configured to excite one or more transmit coils to generate a magnetic field at a target; a plurality of input channels for receiving input signals via respective ones of a plurality of receive coils, the input signals responsive to reflections of the magnetic field off the target and encoding information about a position of the target; a position detection processor to decode the information about the position of the target from the input signals; and an amplitude detection processor configured to calculate an amplitude of the input signals and to control a strength of the magnetic field generated by the coil driver based on a difference between the calculated amplitude to a predetermined desired input amplitude.
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公开(公告)号：US20240146253A1
公开(公告)日：2024-05-02
申请号：US18051934
申请日：2022-11-02
Applicant: Allegro MicroSystems, LLC
Inventor： Hernán D. Romero , Pablo Aguirre
CPC classification number: H03F1/26 , G01D5/2053 , H03F3/189 , H03F2200/135 , H03F2200/168 , H03F2200/333 , H03F2200/451 , H03F2200/459
Abstract: An amplifier circuits inductive/magnetic sensor interface can include a main signal path including one or more amplifiers configured to receive an input signal and to produce an output signal based on the input signal. The input signal may include a square-wave demodulated signal having an associated modulation frequency and an undesired frequency component at twice the modulation frequency of the square-wave demodulated signal. The amplifier circuit may include a gain feedback loop configured to set a gain of the amplifier circuit. The amplifier circuit may include a ripple reduction feedback loop configured to receive an intermediate signal on the main signal path and extract the undesired frequency component of the intermediate signal to produce a filtered version of the intermediate signal and provide the filtered version of the intermediate signal to the main signal path.
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4.发明授权公开(公告)号：US11175160B2
公开(公告)日：2021-11-16
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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5.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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