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公开(公告)号：US11002807B2
公开(公告)日：2021-05-11
申请号：US16806028
申请日：2020-03-02
发明人： Paolo Campiglio , Jeffrey Eagen
摘要： A magnetoresistance element deposited upon a substrate includes a first stack portion having opposing first and second surfaces and including a first plurality of layers. The first stack portion has a first substantially linear response corresponding to an applied magnetic field over a first magnetic field strength range. The magnetoresistance element also includes a second stack portion having opposing first and second surfaces and including a second plurality of layers. The first surface of the second stack portion is disposed over the second surface of the first stack portion and the second stack portion has a second substantially linear response that is different than the first substantially linear response. The second substantially linear response corresponds to the applied magnetic field over a second magnetic field strength range.
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公开(公告)号：US10996289B2
公开(公告)日：2021-05-04
申请号：US15606358
申请日：2017-05-26
摘要： A magnetic field sensor includes at least one coil responsive to an AC coil drive signal; at least two spaced apart magnetic field sensing elements responsive to a sensing element drive signal and positioned proximate to the at least one coil; and a circuit coupled to the at least two magnetic field sensing elements to generate an output signal of the magnetic field sensor indicative of a difference between a distance of a conductive target with respect to each of the at least two spaced apart magnetic field sensing elements.
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公开(公告)号：US10976183B2
公开(公告)日：2021-04-13
申请号：US16522810
申请日：2019-07-26
发明人： Paul A. David , William P. Taylor
IPC分类号： G01D5/244
摘要： A magnetic field sensor includes a substrate first and second magnetic field sensing elements, comprising first and second magnetoresistance elements, respectively. The first and second magnetic field sensing elements are responsive to the magnet. At or more positions of the magnet relative to the first and second magnetic field sensing elements while the magnet is stopped moving, at least one of the first magnetic field sensing element or the second magnetic field sensing element is in saturation in response to the magnet. The magnetic field sensor also includes a third magnetic field sensing element proximate to the first and second magnetoresistance elements, the third magnetic field sensing element operable to generate a third magnetic field sensing element signal responsive to the magnet, wherein, at the one or more positions while the magnet is stopped moving, the third magnetic field sensing element is not in saturation in response to the magnet or saturates at a higher magnetic field than the first and second magnetic field sensing elements in response to the magnet.
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公开(公告)号：US20210057330A1
公开(公告)日：2021-02-25
申请号：US16547823
申请日：2019-08-22
IPC分类号： H01L23/522 , H01L23/66
摘要： Methods and apparatus for a signal isolator IC package including a die having a first die portion isolated from a second die portion. The first die portion is surrounded on six sides by first insulative material and the second die portion is surrounded on six sides by second insulative material. The first die portion provides a first voltage domain and the second die portion provides a second voltage domain. The signal isolator comprises a first signal path between the first die portion and the second die portion, wherein the first signal path is isolated with respect to the first and second die portions.
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公开(公告)号：US20210048456A1
公开(公告)日：2021-02-18
申请号：US17061602
申请日：2020-10-02
发明人： Sam Tran , Jay M. Towne , P. Karl Scheller
IPC分类号： G01R19/165 , G01R31/40 , G01R31/28 , G01R33/02
摘要： A monitor circuit for monitoring a level of a first and second regulated source may monitor a voltage level of regulated voltages or a current level of regulated currents. In an embodiment, the monitor circuit includes circuitry responsive to a first regulated current and to a second regulated current. A first circuit responsive to the first regulated current and to the second regulated current generates a first error signal indicative of at least one of an overcurrent condition of the first regulated current and an undercurrent condition of the second regulated current. A second circuit responsive to the first regulated current and to the second regulated current generates a second error signal indicative of at least one of an undercurrent condition of the first regulated current and an overcurrent condition of the second regulated current. A method for monitoring the levels of first and second regulated sources is also provided.
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公开(公告)号：US10921373B2
公开(公告)日：2021-02-16
申请号：US15825879
申请日：2017-11-29
IPC分类号： G01R31/319 , G01R33/09 , G01D5/14 , G01D18/00
摘要： A method of determining an error condition in a magnetic field sensor can include receiving a first bridge signal, the first bridge signal generated by a first full bridge circuit. The method can also include receiving a second bridge signal, the second bridge signal generated by a second full bridge circuit. The method can also include determining a bridge separation from the first bridge signal and the second bridge signal. The method can also include comparing a function of the bridge separation to a threshold value. The method can also include generating an error signal indicative of the error condition or not indicative of the error condition in response to the comparing.
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公开(公告)号：US20210036896A1
公开(公告)日：2021-02-04
申请号：US16526081
申请日：2019-07-30
摘要： An isolation circuit that isolates a driver circuit that is biased at a first common mode voltage from a detection circuit that is biased at a second common mode voltage using isolation capacitors. The detection circuit includes a transimpedance amplifier having improved susceptibility to transient common-mode input signals and improved insensitivity to parasitic capacitance on the isolation capacitor terminals. Included within the transimpedance amplifier are circuits for mirroring current to convert the input current from the isolation capacitors into a voltage value and to amplify that voltage value. The transimpedance amplifier outputs a differential voltage value that is held by a latch circuit so that a comparator in the detection circuit can process the differential voltage value and output a differential signal with fully restored logic levels.
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公开(公告)号：US20210033646A1
公开(公告)日：2021-02-04
申请号：US16527636
申请日：2019-07-31
发明人： Wade Bussing , Alexander Latham
摘要： A current sensor can include a lead frame. The lead frame can include a first lead and a second lead, wherein the first and second leads are coupled together at a first junction region of the lead frame, wherein the current sensor is operable to sense a magnetic field generated by a first current passing through the first junction region. The current sensor can further include a first die disposed proximate to the lead frame. The first die can include a first magnetic field sensing element disposed on a surface of the first die, a first circuit coupled to the first magnetic field sensing element for generating a first signal indicative of a first current, and a first node coupled to the first signal. The current sensor can further include a second die disposed proximate to the lead frame. The second die can include a second magnetic field sensing element disposed on a surface of the second die, a second circuit coupled to the second magnetic field sensing element for generating a second signal indicative of the first current passing through the first junction region or indicative of a second current passing through the lead frame and a second node coupled to the second signal.
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公开(公告)号：US20200340833A1
公开(公告)日：2020-10-29
申请号：US16397162
申请日：2019-04-29
发明人： Florian Kulla , Cédric Gillet
摘要： A magnetic field sensor including at least one magnetoresistance element configured to generate a magnetic field signal indicative of a magnetic field associated with a target having features and spaced from the at least one magnetoresistance element by an airgap. The sensor includes a detector responsive to the magnetic field signal and to a threshold level to generate a sensor output signal containing transitions, each transition associated with a feature of the target and occurring in response to the magnetic field signal crossing the threshold level. The sensor includes a threshold generator configured to generate the threshold level having a rising threshold level limit and a falling threshold level limit.
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公开(公告)号：US10811961B1
公开(公告)日：2020-10-20
申请号：US16564287
申请日：2019-09-09
发明人： Thomas Ross , Aldo Togneri , James McIntosh , Gianluca Allegrini
摘要： A charge pump includes a first power source having a voltage VREG generated from a regulated and circuit-limiter supply, a second power source having a voltage VBRG and a top-off capacitor adapted to be charged to a voltage of the high of VREG or VBRG to a limit of a voltage clamp across the top-off capacitor.
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