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公开(公告)号：US11624799B2
公开(公告)日：2023-04-11
申请号：US17380244
申请日：2021-07-20
摘要： A method for use in a sensor includes generating a first signal by a first sensing module in response to a magnetic field associated with a rotating target, generating a base word based on the first signal, the base word including a first base bit that is generated by comparing respective components of the first signal, reversing a respective polarity of the first signal and offsetting the first signal, generating a test word based on the first signal, the test word being generated after the respective polarity of the first signal is reversed and the first signal is offset, the test word including a first test bit that is generated by comparing the respective components of the first signal, and setting a value of an error signal based on whether the test word matches the base word.
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公开(公告)号：US11604058B2
公开(公告)日：2023-03-14
申请号：US16800229
申请日：2020-02-25
摘要： In one aspect, an angle sensor includes a first linear sensor and a second linear sensor. A first magnetic-field direction of a target magnet measured by the first linear sensor is substantially equal to a second magnetic-field direction of the target magnet measured by the second linear sensor. The first linear sensor, the second linear sensor and the target magnet are on an axis. The angle sensor determines an angle of a magnetic field.
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公开(公告)号：US20230077015A1
公开(公告)日：2023-03-09
申请号：US17466202
申请日：2021-09-03
发明人： Alexander Latham , Hernán D. Romero
IPC分类号： G01L3/10
摘要： Methods and apparatus for linear inductive torque sensing that may include transmitting an AC magnetic field with a transmit coil toward a conductive target and receiving a field reflected by the conductive target with a receive coil, wherein the conductive target comprises first and second targets positioned with respect to each other and each shaped to linearly increase or decrease an amount of conductive area of the conductive target due to relative movement of the first and second targets which changes an amount of the field reflected by the conductive target. A signal from the receive coil can be processed to determine a relative position of the first and second targets corresponding to an amount of torque on an elongate member connected to the first and second targets. In other embodiments, a change in inductance of the transmit coil is measured to determine relative target position.
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公开(公告)号：US11601733B2
公开(公告)日：2023-03-07
申请号：US17230276
申请日：2021-04-14
发明人： Bryan Cadugan
IPC分类号： H04N25/63 , H01L27/146
摘要： Methods and apparatus for temperature sensing in a detector system. Dark current from pixels in a pixel array of the detector system can be filtered to remove noise and processed to determine a temperature of the pixel array from the filtered dark current. Calibration of the dark current for a range of temperatures can be performed. In embodiments, the pixels comprise photodiodes.
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公开(公告)号：US11585868B2
公开(公告)日：2023-02-21
申请号：US16994864
申请日：2020-08-17
发明人： P. Karl Scheller , James E. Burgess , Steven E. Snyder , Kristann L. Moody , Devon Fernandez , Andrea Foletto
IPC分类号： G01R33/06 , G01R33/00 , G01D5/244 , G01P3/487 , G01P3/488 , G01P21/02 , G01R23/00 , G01P3/44 , G01P13/00
摘要： Systems, methods, and apparatuses for magnetic field sensors with self-test include a detection circuit to detect speed and direction of a target. One or more circuits to test accuracy of the detected speed and direction may be included. One or more circuits to test accuracy of an oscillator may also be included. One or more circuits to test the accuracy of an analog-to-digital converter may also be included. Additionally, one or more IDDQ and/or built-in-self test (BIST) circuits may be included.
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公开(公告)号：US11581697B2
公开(公告)日：2023-02-14
申请号：US17197328
申请日：2021-03-10
发明人： William P. Taylor , Bryan Cadugan
IPC分类号： H01S3/10 , H01S5/00 , H01S5/068 , H01S5/50 , H01S3/0915 , H01S3/0941 , H01S3/30 , H01S5/026 , H01S5/40
摘要： Methods and apparatus for a controlling a stimulus source to direct photons to a pixel in a pixel array contained in a detector system, analyzing a response of the pixel in the pixel array; and generating an alert based on the response of the pixel in the pixel array. Example stimulus sources include a conductive trace, a PN junction, and a current source.
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公开(公告)号：US20230027608A1
公开(公告)日：2023-01-26
申请号：US17937556
申请日：2022-10-03
发明人： Hernán D. Romero
摘要： In one aspect, a magnetic-field sensor includes main coil circuitry configured to generate a first magnetic field signal at a first frequency. A reflected signal is generated from a target caused by the first signal generated by the main coil circuitry. The magnetic field sensor also includes magnetoresistance circuitry configured to receive an error signal. The error signal is formed from a combination of the reflected signal and a second magnetic field signal. The magnetic-field sensor further includes analog circuitry configured to receive an output signal from the magnetoresistance circuitry, digital circuitry configured to receive an output signal from the analog circuitry, a mixer configured to receive a feedback signal from one of the digital circuitry or the analog circuitry, and secondary coil circuitry configured to receive a driver signal from the mixer causing the secondary coil circuitry to generate the second magnetic field signal at the first frequency.
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公开(公告)号：US20220397382A1
公开(公告)日：2022-12-15
申请号：US17344295
申请日：2021-06-10
摘要： Methods and apparatus for prosing a sensor IC package having first and second sets of magnetic field sensing elements and a third set of magnetic field sensing elements located between the first and second positions, wherein the first, second, and third sets of magnetic field sensing elements have a first axis of sensitivity and a second axis of sensitivity, wherein the first and second axes of sensitivity are orthogonal. The sensor IC package is positioned in relation to a target comprising a two-pole magnet and the first and second axes of sensitivity are perpendicular to an axis about which the target rotates. Differential signals are processed to determine an absolute position of the target. A first secondary angle position is generated from the first and third sets of magnetic field sensing elements.
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公开(公告)号：US11519939B2
公开(公告)日：2022-12-06
申请号：US17472769
申请日：2021-09-13
发明人： Shixi Louis Liu , Paul A. David , Shaun D. Milano , Rishikesh Nikam , Alexander Latham , Wade Bussing , Natasha Healey , Georges El Bacha
摘要： A current sensor integrated circuit (IC) includes a unitary lead frame having at least one first lead having a terminal end, at least one second lead having a terminal end, and a paddle having a first surface and a second opposing surface. A semiconductor die is supported by the first surface of the paddle, wherein the at least one first lead is electrically coupled to the semiconductor die and the at least one second lead is electrically isolated from the semiconductor die. The current sensor IC further includes a first mold material configured to enclose the semiconductor die and the paddle and a second mold material configured to enclose at least a portion of the first mold material, wherein the terminal end of the at least one first lead and the terminal end of the at least one second lead are external to the second mold material.
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公开(公告)号：US11469666B2
公开(公告)日：2022-10-11
申请号：US16589214
申请日：2019-10-01
发明人： Kapil Kesarwani , Mackenzie Tope
摘要： A control circuit for a voltage regulator includes a divider coupled to the regulated output voltage to generate a divided voltage having a value that is a fraction of the regulated output voltage, an ADC responsive to the divided voltage to generate a feedback control signal, a digital compensator responsive to the feedback control signal and to a feedforward control signal scaled by a feedforward gain value to generate a compensator signal, and a pulse width modulator responsive to the compensator signal to generate a voltage control signal to control a switch of the voltage regulator. The digital compensator includes a register configured to store a value indicative of the input voltage and a feedforward gain unit configured to generate the feedforward gain value in response to the value indicative of the input voltage. In embodiments, the feedforward gain value is generated in response to the square of the value indicative of the input voltage. The feedforward gain value can be updated each time the value indicative of the input voltage is updated.
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