Allegro Microsystems, LLC

Manuel Rivas

Gerardo A Monreal

Leandro Fuentes

Bruno Luis Uberti

Juan Manuel Cesaretti

Alejandro Gabriel Milesi

Eric G Shoemaker

Ezequiel Rubinsztain

Pablo Javier Bolsinger

Christine M Graham

Nicolás Rigoni

Patricio Hernan Perez Preiti

Javier Cuneo

Geraldo A Monreal

According to aspects of the disclosure, a method is provided for use in a sensor, the method comprising: detecting that a frequency of a first signal is in a first range, the first signal being generated, at least in part, by one or more first magnetic field sensing elements, the first signal being generated in response to a magnetic field that is associated with a rotating target, the rotating target including a plurality of pole pairs; identifying a first resolution that corresponds to the first range and causing the first resolution to become a current resolution of the sensor; and transmitting a data stream in accordance with the current resolution of the sensor, wherein transmitting the data stream includes: (i) transmitting a plurality of speed pulses that encode a speed of the rotating target, and (ii) transmitting a plurality of data pulse sets.

Dynamic resolution sensor

A two-wire electronic circuit can sense a voltage across terminals of a transistor and control an electrical current of the two-wire electronic circuit in accordance with the sensed voltage.

Electronic circuit to communicate information as an electrical current on two wires such that the electrical current is stabilized by measuring a voltage on a transistor within the electronic circuit

A tracking ADC with adaptive slew rate boosting can dynamically adjust one or more of its operational parameters in response to detecting a slew rate limit condition. In some embodiments, slew rate boosting can include increasing the value of a digital error signal in response to detection of a slew rate limit condition. In other embodiments, slew rate boosting can include increasing a clock frequency of the tracking ADC in response to detection of a slew rate limit condition.

Tracking analog-to-digital converter with adaptive slew rate boosting

A circuit for detecting motion of an object includes a semiconductor substrate having first and second opposing surfaces. The circuit also includes a magnetic field sensor disposed on the first surface of the substrate and configured to generate a respective plurality of magnetic field sensor output signals in response to a magnetic field associated with the object. At least one of the magnetic field sensor output signals is indicative of an angular position of the magnetic field with respect to the sensor. Additionally, at least one of the magnetic field sensor output signals is indicative of an amplitude of the magnetic field.

Circuit for detecting motion of an object

In one aspect, an integrated circuit (IC) includes a first magnetic field sensor configured to sense a ring magnet, a second magnetic field sensor configured to sense the ring magnet and processing circuitry configured to receive a first signal from the first magnetic field sensor and to receive a second signal from the second magnetic field sensor. The processing circuitry is further configured to control an on/off state of at least one light emitting diode (LED) and brightness of the LED based on movement and position of the ring magnet with respect to the first and second magnetic field sensors.

Light emitting diode driver for dimming and on/off control

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.

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

An electronic comparison circuit can identify at least three conditions of an input signal received by the electronic comparison circuit. A first one of the at least three conditions occurs when a value of the input signal is less than a first threshold value, a second one of the at least three conditions occurs when a value of the input signal is greater than the first threshold value and less than a second threshold value, and a third one of the at least three conditions occurs when a value of the input signal is greater than the second threshold value. A magnetic field sensor can use the electronic comparison circuit.

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Ciudad de Buenos Aires, Argentina

Manuel Rivas