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Allegro Microsystems Inc
Allegro Microsystems Inc_20100121

Allegro Microsystems Inc patents (2016 archive)


Recent patent applications related to Allegro Microsystems Inc. Allegro Microsystems Inc is listed as an Agent/Assignee. Note: Allegro Microsystems Inc may have other listings under different names/spellings. We're not affiliated with Allegro Microsystems Inc, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "A" | Allegro Microsystems Inc-related inventors


Methods and apparatus for monitoring a level of a regulated source

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 voltage and to a second regulated voltage. ... Allegro Microsystems Inc

Controlling dimming ratio and output ripple voltage

In one aspect, an integrated circuit (ic) is configured to receive an input signal. The ic includes a boost switch driver configured to provide a switching operation to a boost converter to drive a string of light emitting diodes (leds), a current sink driver connected to a current source and configured to provide a current signal to the string of leds, and a delay module configured to delay the current signal to the string of leds with respect to the input signal.. ... Allegro Microsystems Inc

Magnetic field sensor for angle detection with a phase-locked loop

A magnetic field sensor includes a phase-locked loop to receive a measured magnetic field signal formed from sensing element output signals of a plurality of magnetic field sensing elements in response to a magnetic field. The phase-locked loop is configured to generate an angle signal having a value indicative of the angle of the magnetic field. ... Allegro Microsystems Inc

Ground reference fault detection in circuits with multiple ground references

A ground fault detection circuit is configured to detect a ground fault in a circuit or system that has more than one ground reference. In an embodiment, an electronic circuit includes a first circuit coupled to a first ground node. ... Allegro Microsystems Inc

Magnetic field sensor for orientation independent speed and direction measurement

A magnetic field sensor that provides target speed and direction detection that is independent of sensor-to-target orientation includes at least three differential channels, each responsive to a pair of magnetic field sensing elements to generate a respective magnetic field channel signal. A combining element is configured to generate a combined signal based on the first, second, and third magnetic field channel, signals and control circuitry responsive to the combined signal and to at least one of the first, second, and third magnetic field channel signals generates a sensor output signal that indicative of target speed and direction.. ... Allegro Microsystems Inc

Joystick assembly

A joystick assembly for use with a device including a joystick surface and a first magnet having north and south magnetic poles includes a second magnet having north and south magnetic poles and a movable elongated shaft having first and second opposing ends arranged along a major axis of the shaft. The first end of the shaft is coupled to the second magnet such that movement of the shaft results in movement of the second magnet relative to the first magnet such that a line between centers of the north and south magnetic poles of the second magnet is movable relative to a line between the north and south magnetic poles of the first magnet. ... Allegro Microsystems Inc

Circuits and methods for modulating current in circuits comprising sensing elements

A circuit includes a current source having at least first terminal and a second, control terminal. The current source is configured to receive a current control signal at the control terminal and in response thereto generates a first current signal at the first terminal. ... Allegro Microsystems Inc

Hall effect sensing element

In one aspect, a hall effect sensing element includes a hall plate having a thickness less than about 100 nanometers an adhesion layer directly in contact with the hall plate and having a thickness in a range about 0.1 nanometers to 5 nanometers. In another aspect, a sensor includes a hall effect sensing element. ... Allegro Microsystems Inc

Electronic circuit for driving a hall effect element with a current compensated for substrate stress

An electronic circuit can be disposed upon a semiconductor substrate. An epitaxial layer can be disposed over the semiconductor substrate. ... Allegro Microsystems Inc

Circuits and methods for processing signals generated by a circular vertical hall (cvh) sensing element in the presence of a multi-pole magnet

Described embodiments provide a magnetic field sensor has a circular vertical hall (cvh) sensing element with a plurality of vertical hall elements disposed over a common implant region in a substrate. The magnetic field sensor generates output signals responsive to a magnetic field generated by a multi-pole magnet having a plurality of north poles and also a plurality of south poles. ... Allegro Microsystems Inc

Output driver having reduced electromagnetic susceptibility and associated methods

An electronic circuit includes semiconductor substrate having a first doping type and a reference terminal coupled to the semiconductor substrate. A tub area having a second doping type is formed in the semiconductor substrate. ... Allegro Microsystems Inc

Magnetic field sensor

In one aspect, a magnetic field sensor includes a chopper stabilized amplifier and a plurality of hall-type elements in parallel and connected to the chopper stabilized amplifier. In another aspect, a magnetic field sensor includes a chopper stabilized amplifier and a plurality of hall quad elements in parallel and connected to the chopper stabilized amplifier. ... Allegro Microsystems Inc

Current sensor isolation

A current sensor integrated circuit includes a lead frame having a primary conductor and at least one secondary lead, a semiconductor die disposed adjacent to the primary conductor, an insulation structure disposed between the primary conductor and the semiconductor die, and a non-conductive insulative material enclosing the semiconductor die, the insulation structure, a first portion of the primary conductor, and a first portion of the at least one secondary lead to form a package. The first portion of the at least one secondary lead (between a first end proximal to the primary conductor and a second end proximal to the second, exposed portion of the at least one secondary lead) has a thickness that is less than a thickness of the second, exposed portion of the least one secondary lead. ... Allegro Microsystems Inc

Magnetic field sensor with improved accuracy and method of obtaining improved accuracy with a magnetic field sensor

A magnetic field sensor includes a circular vertical hall (cvh) sensing element comprising a plurality of vertical hall elements, each one of the plurality of vertical hall elements comprising respective first and second current receiving contacts. The magnetic field sensor additionally includes a sequence switches circuit coupled to the plurality of vertical hall elements. ... Allegro Microsystems Inc

08/18/16 / #20160238671

Systems and methods for processing temperature data or other signals

In an embodiment, a circuit is configured to produce a magnetic field signal having a frequency spectrum. The circuit may also produce a temperature signal. ... Allegro Microsystems Inc

08/18/16 / #20160238462

Temperature detection circuit for a magnetic sensor

In one aspect, a temperature detection circuit includes a first circuit configured to provide a first signal and a comparator circuit configured to provide a warning signal in response to the first signal if a temperature reaches a temperature value. The first signal enables determination of a parameter of a magnetic sensor.. ... Allegro Microsystems Inc

08/11/16 / #20160233767

Buck-boost converter control circuits and techniques

A controller for a buck-boost converter includes a feedback control circuit responsive to the converter output and configured to generate a control signal for the buck switch and a feed forward control circuit responsive to the input voltage and configured to generate a control signal for the boost switch. The feed forward circuit is decoupled from the converter output and may be programmable to select a predetermined output voltage.. ... Allegro Microsystems Inc

08/11/16 / #20160233670

Electronic device with shared eos protection and power interruption mitigation

In an embodiment, an electronic device comprises a shared electrical over-stress (eos) protection circuit. The shared eos protection circuit may be coupled between a power input terminal and ground terminal to provide an eos current path from the power input terminal to the ground terminal, and coupled between the output terminal and the ground terminal to provide an eos current path from the output terminal to the ground terminal. ... Allegro Microsystems Inc

08/11/16 / #20160231393

Magnetic field sensor and associated method that can store a measured threshold value in a memory device during a time when the magnetic field sensor is powered off

A magnetic field sensor includes a comparator detector for which a measured threshold value is stored prior to power down and recalled upon power up for use by the comparator detector. A corresponding method is associated with the magnetic field sensor.. ... Allegro Microsystems Inc

07/21/16 / #20160209476

Magnetic field sensor with delayed output

Apparatuses, systems, and methods that provide a delayed output signal with reduced sampling error are described. Embodiments include a clock circuit that generates a sample clock signal having a predetermined sample clock period. ... Allegro Microsystems Inc

07/21/16 / #20160209239

Magnetoresistance elements with biasing magnetic source

In an embodiment, a magnetic field sensor comprises a substrate and a first magnetoresistive element supported by the substrate. The magnetic field sensor also includes a second magnetoresistive element supported by the substrate and coupled in series with the first magnetoresistive element to form a voltage node between the first and second magnetoresistive elements, and at which an output voltage is provided that changes in response to an external magnetic field. ... Allegro Microsystems Inc

07/21/16 / #20160208763

Methods and apparatus for generating a threshold signal in a magnetic field sensor

A magnetic field sensor for detecting motion of an object includes threshold generation circuitry and processing. Magnetic field sensing elements are configured to generate a magnetic field signal in response to a magnetic field associated with the object. ... Allegro Microsystems Inc

07/14/16 / #20160200245

Integrated magnetic field sensor and method of powering on and off a load

An integrated magnetic field sensor includes a magnetic field sensing circuit and a power driving circuit disposed upon or within a common substrate. A method of powering on and off a load uses the above integrated magnetic field sensor.. ... Allegro Microsystems Inc

06/16/16 / #20160172584

Methods and apparatus for magnetic sensor having non-conductive die paddle

Methods and apparatus to provide a magnetic field sensor device including a magnetic sensor element, a die having wafer bumps, wherein the magnetic sensor element is positioned in relation to the die, and conductive leadfingers having respective portions electrically connected to the wafer bumps. In embodiments, the device includes a region about the magnetic sensor element that does not contain electrically conductive material for preventing eddy current flow.. ... Allegro Microsystems Inc

05/26/16 / #20160146905

Magnetic field sensor with improved accuracy resulting from a variable potentiometer and a gain circuit

A magnetic field sensor includes a plurality of magnetic field sensing elements, wherein the plurality of magnetic field sensing elements is configured to generate a plurality of magnetic field signals, each magnetic field sisal responsive to a magnetic field. The magnetic field sensor additionally includes a sequence switches circuit coupled to the plurality of magnetic field sensing elements. ... Allegro Microsystems Inc

05/19/16 / #20160139230

Magnetic field sensor having calibration circuitry and techniques

A magnetic field sensor includes at least one magnetic field sensing element configured to generate a measured magnetic field signal responsive to an external magnetic field and to generate a reference magnetic field signal responsive to a reference magnetic field and a calibration circuit configured to divide the measured magnetic field signal by the reference magnetic field signal to generate a calibrated magnetic field signal. The calibrated signal has reduced susceptibility to stress influences.. ... Allegro Microsystems Inc

05/19/16 / #20160139229

Dual-path analog to digital converter

Methods and apparatus for processing a signal comprise at least one circuit configured to generate a measured signal during a measured time period and a reference signal during a reference time period. Also included is at least one dual- or multi-path analog-to-digital converter comprising at least a first processing circuit configured to process the measured signal, at least a second processing circuit configured to process the reference signal, and a third processing circuit configured to process both the measured signal and the reference signal.. ... Allegro Microsystems Inc

05/19/16 / #20160139199

Magnetic field sensor with shared path amplifier and analog-to-digital-converter

Methods and apparatus for processing a signal comprise at least one circuit configured to generate a measured signal during a measured time period and a reference signal during a reference time period. Also included is at least one dual- or multi-path analog-to-digital converter comprising at least a first processing circuit configured to process the measured signal, at least a second processing circuit configured to process the reference signal, and a third processing circuit configured to process both the measured signal and the reference signal.. ... Allegro Microsystems Inc

05/05/16 / #20160124054

Magnetic field sensor and electronic circuit that pass amplifier current through a magnetoresistance element

Electronic circuits used in magnetic field sensors use transistors for passing a current through the transistors and also through a magnetoresistance element.. . ... Allegro Microsystems Inc

05/05/16 / #20160123780

Methods and apparatus for error detection in a magnetic field sensor

A magnetic field sensor for detecting motion of an object includes error detection circuiting and processing. Magnetic field sensing elements are configured to generate at least two magnetic field signals in response to a magnetic field associated with the object which signals are used by detectors to generate right and left channel signals with edges indicative of motion of the object. ... Allegro Microsystems Inc

05/05/16 / #20160123774

Magnetic field sensor for sensing a movement of a ferromagnetic target object

A magnetic field sensor operates as a motion detector for sensing a movement of a ferromagnetic target object having features. The magnetic field sensor has a plurality of magnetoresistance elements to generate, in a first channel, a feature signal indicative of a proximity of a feature of a ferromagnetic target object and, in a second channel, an edge signal indicative of a proximity of an edge of a feature of a ferromagnetic target object.. ... Allegro Microsystems Inc

05/05/16 / #20160123771

Magnetic field sensor providing a movement detector

A magnetic field sensor has a plurality of magnetic field sensing elements and operates as a motion detector for sensing a rotation or other movement of a target object.. . ... Allegro Microsystems Inc

05/05/16 / #20160123770

Magnetic field motion sensor and related techniques

A magnetic field sensor for detecting motion of an object includes magnetic field sensing elements to generate at least two phase-separated magnetic field signals and a processor including a vector angle generator to generate vector angle values as a function of the magnetic field signals and a vector angle comparator to generate a comparator output signal indicative of a difference between a plurality of vector angle values. An output signal generator responsive to the comparator output signal is configured to generate a sensor output signal indicative of a one or more conditions of motion of the object including: an absence of normal rotation, a direction change, and a vibration. ... Allegro Microsystems Inc

05/05/16 / #20160123768

Magnetic field sensor for sensing a movement of a target object

A magnetic field sensor operates as a motion detector for sensing a movement of a ferromagnetic target object having features. The magnetic field sensor has a plurality of magnetoresistance elements to generate, in a first channel, a feature signal indicative of a proximity of a feature of a ferromagnetic target object and, in a second channel, an edge signal indicative of a proximity of an edge of a feature of a ferromagnetic target object.. ... Allegro Microsystems Inc

04/07/16 / #20160097825

Magnetic field sensors with self test

A system includes a magnetic target and a magnetic field sensor. The magnetic field sensor comprises an output node; a circuit to detect a magnetic field produced by the magnetic target; and a processor. ... Allegro Microsystems Inc

02/18/16 / #20160049939

Switch driver circuit and associated methods

A driver circuit for driving a switch includes a high output impedance driver circuit portion having a high impedance output node coupled to the control terminal of the transistor and a low output impedance driver circuit portion having a low impedance output node also coupled to the control terminal of the transistor. The slew rate of the control signal is established by at least one of the high impedance driver circuit portion and the low impedance driver circuit portion.. ... Allegro Microsystems Inc

01/28/16 / #20160028001

Packaging for an electronic device

In one aspect, a method includes processing a metal substrate, performing a first etch on a first surface of the metal substrate to form, for an integrated circuit package, secondary leads and a curved component having two primary leads and performing a second etch, on a second surface of the substrate opposite the first surface, at locations on the secondary leads and locations on the curved component to provide a locking mechanism. Each primary lead located at a respective end of the curved component.. ... Allegro Microsystems Inc

01/28/16 / #20160025820

Systems and methods for magnetic field sensors with self-test

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. ... Allegro Microsystems Inc








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