-
公开(公告)号：US20170115362A1
公开(公告)日：2017-04-27
申请号：US14918716
申请日：2015-10-21
Applicant: ALLEGRO MICROSYSTEMS, LLC
Inventor： Alexander Latham , Stephen Marshall , Aaron Cook
CPC classification number: G01R33/07 , G01R33/0023
Abstract: Methods and apparatus for a sensor having non-ratiometric fault trip level setting. In embodiments, a sensor has a sensing element with a fixed gain. A signal processing module receives the fault trip level setting and maintains the fault trip level setting constant during changes in the supply voltage.
-
公开(公告)号：US20190339985A1
公开(公告)日：2019-11-07
申请号：US15967822
申请日：2018-05-01
Applicant: Allegro MicroSystems, LLC
Inventor： Aaron Cook , Kenneth Snowdon , John Waranowski , Virag V. Chaware
IPC: G06F9/4401 , G06F1/32 , G01R33/06 , G01R33/00
Abstract: A sensor integrated circuit includes a disturb immune memory configured to store data and a digital processor coupled to the disturb immune memory and including a main register. The digital processor is configured to perform one of a fast reset or slow reset of the main register according to a level of a supply voltage to the integrated circuit. The fast reset includes resetting the main register according to the data stored in the disturb immune memory and the slow reset includes resetting the main register according to a default state.
-
公开(公告)号：US20190113584A1
公开(公告)日：2019-04-18
申请号：US15782163
申请日：2017-10-12
Applicant: Allegro MicroSystems, LLC
Inventor： Aaron Cook , Virag V. Chaware , Craig S. Petrie
IPC: G01R33/00
Abstract: An apparatus comprises a first measurement circuit having a first magnetic field sensing element to detect a measured magnetic field and produce a first signal representing the measured magnetic field, and a first signal processing circuit to process the first signal to produce a first processed signal. A second measurement circuit comprises a second magnetic field sensing element to detect a measured magnetic field and produce a second signal representing the measured magnetic field, and a second signal processing circuit to process the second signal to produce a second processed signal. A diagnostic processing circuit is coupled to receive the first signal and the second signal and configured to process the first signal during a first time period to produce a first diagnostic signal, and process the second signal during a second time period. A logic circuit determines if an error is present.
-
公开(公告)号：US10101410B2
公开(公告)日：2018-10-16
申请号：US14918716
申请日：2015-10-21
Applicant: ALLEGRO MICROSYSTEMS, LLC
Inventor： Alexander Latham , Stephen Marshall , Aaron Cook
Abstract: Methods and apparatus for a sensor having non-ratiometric fault trip level setting. In embodiments, a sensor has a sensing element with a fixed gain. A signal processing module receives the fault trip level setting and maintains the fault trip level setting constant during changes in the supply voltage.
-
公开(公告)号：US10466298B2
公开(公告)日：2019-11-05
申请号：US15710136
申请日：2017-09-20
Applicant: Allegro MicroSystems, LLC
Inventor： Virag V. Chaware , Aaron Cook , Craig S. Petrie
IPC: G01R27/26 , G01R31/28 , G01R33/09 , G01R33/07 , G01R33/00 , G01D5/14 , G01D5/244 , G01R35/00 , G01R15/20
Abstract: A magnetic field sensor comprises at least one magnetic field sensing element configured to generate a measured magnetic field signal responsive to an external magnetic field; a diagnostic circuit configured to generate a diagnostic signal, wherein the diagnostic signal is not dependent on a measured magnetic field; a signal path comprising an amplifier and an analog-to-digital converter for processing the measured magnetic field signal to generate a sensor output signal indicative of the external magnetic field during a measured time period and for processing the diagnostic signal during a diagnostic time period; and a switch coupled to receive the measured magnetic field signal and the diagnostic signal and direct the measured magnetic field signal to the signal path during the measured time period and direct the diagnostic signal to the signal path during the diagnostic time period.
-
Patent Agency Ranking
公开(公告)号：US20190302196A1
公开(公告)日：2019-10-03
申请号：US15936888
申请日：2018-03-27
Applicant: Allegro MicroSystems, LLC
Inventor： Aaron Cook
Abstract: A magnetic field sensor includes a first magnetic field sensing element configured to generate a first magnetic field signal indicative of a magnetic field associated with a target, a second magnetic field sensing element spaced from the first magnetic field sensing element and configured to generate a second magnetic field signal indicative of the magnetic field associated with the target. A switching module coupled to receive the first and second magnetic field signals is configured to generate a combined signal having alternating portions associated with the first and second magnetic field signals. A polarity module coupled to receive the combined signal is configured to invert a polarity of portions of the combined signal associated with one of the first magnetic field signal or the second magnetic field signal to generate an inverted polarity signal and a filter coupled to receive the inverted polarity signal is configured to generate an averaged signal corresponding to an average of the first and second magnetic field signals.
-
公开(公告)号：US10209732B2
公开(公告)日：2019-02-19
申请号：US15071298
申请日：2016-03-16
Applicant: Allegro MicroSystems, LLC
Inventor： Aaron Cook
Abstract: A bandgap reference circuit includes a voltage reference circuit configured to generate a reference voltage at a first output and a proportional to absolute temperature (PTAT) current source configured to generate a PTAT current reference at a second output. A divider circuit is coupled to the reference voltage and configured to generate a divided reference voltage at a third output of the bandgap reference circuit. The bandgap reference circuit further includes a tunable current source coupled to the divider circuit and configured to generate a tunable current reference at a fourth output of the bandgap reference circuit based, at least in part, on the divider circuit. A method of generating a tunable current with a bandgap circuit is also provided.
-
公开(公告)号：US20190018079A1
公开(公告)日：2019-01-17
申请号：US16127295
申请日：2018-09-11
Applicant: Allegro MicroSystems, LLC
Inventor： Alexander Latham , Stephen Marshall , Aaron Cook
Abstract: Methods and apparatus for a sensor having non-ratiometric fault trip level setting. In embodiments, a sensor has a sensing element with a fixed gain. A signal processing module receives the fault trip level setting and maintains the fault trip level setting constant during changes in the supply voltage.
-
9.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.
-
公开(公告)号：US11163019B1
公开(公告)日：2021-11-02
申请号：US16985577
申请日：2020-08-05
Applicant: Allegro MicroSystems, LLC
Inventor： Virag V. Chaware , Aaron Cook
Abstract: Described embodiments provide a magnetic field sensor that includes first and second spaced magnetic field sensing elements that each generate a signal indicative of a magnetic field associated with a target. A switching module couples a first terminal of the first magnetic field sensing element having a first polarity to a first terminal of the second magnetic field sensing element having a polarity opposite the first polarity to generate a first combined signal. The switching module couples a second terminal of the first magnetic field sensing element having a polarity opposite the first polarity to a second terminal of the second magnetic field sensing element having the first polarity to generate a second combined signal. The switching module simultaneously couples the first and the second combined signals to an amplifier, which generates an output signal indicative of the magnetic field that has stray magnetic field effects cancelled.
-
-
-
-
-
-
-
-
-
Search Results
14
records
(took 0.02 seconds)
