Allegro Microsystems, LLC

Stmicroelectronics Design and Application S.r.o.

Martin Drinovsky

Hernán D Romero

Matthieu Thomas

Roman Prochazka

Roman Procházka

Petr Bily

Karel Znojemsky

A current sensor comprising: a substrate; a conductor that is disposed on or adjacent to the substrate; one or more sensing elements that are formed on the substrate, the one or more sensing elements being configured to generate one or more first signals in response to a magnetic field that is associated with the conductor; and electronic circuitry that is formed on the substrate, the electronic circuitry being configured to generate a second signal based on the one or more first signals, the second signal being indicative of a level of electrical current through the conductor, wherein the electronic circuitry includes a first instance of a component, a second instance of the component, and mixing circuitry that is configured to mix an output of the first instance with an output of the second instance to produce a mixed signal.

Sensor architecture for correcting thermally-induced linearity error

A sensor includes a first sensing element configured to sense a parameter and generate a first sensing element output signal indicative of the parameter, a first front end element configured to receive the first sensing element output signal and to generate a first front end signal, a second sensing element configured to sense the parameter and generate a second sensing element output signal indicative of the parameter, a second front end element configured to receive the second sensing element output signal and to generate a second front end signal, a difference block configured to receive the first and second front end signals and generate a difference signal indicative of a difference between the first and second front end signals, an absolute value block configured to receive the difference signal and generate an absolute difference signal indicative of an absolute value of the difference signal, and an offset comparator configured to compare the absolute difference signal to an offset threshold to detect whether a difference between an offset associated with the first front end signal and an offset associated with the second front end signal is within a predetermined tolerance.

Method and apparatus for sensor signal path diagnostics

Magnetic field sensors and associated techniques use a Hall effect element in a current spinning arrangement in combination with a rippled reduction feedback network configured to reduce undesirable spectral components generated by the current spinning and other circuit elements.

Fast response magnetic field sensors and associated methods for removing undesirable spectral components

A circuit includes a first amplifier having first and second inputs and first and second output, first and second input capacitors, a first feedback capacitor selectively coupled between the first input and the first output, and a second feedback capacitor selectively coupled between the second input and the second output. During a second phase of operation, the first and second feedback capacitors are decoupled from the output and the first amplifier is configured to sample an input common mode voltage, an output common mode voltage, and an input offset voltage of the first amplifier on the first and second input capacitors. During a first phase of operation, the first feedback capacitor is coupled between the input and the output, the second feedback capacitor is coupled between the input and the output, and the first amplifier is configured to amplify a differential input signal provided across the first and second inputs.

Capacitive amplifier circuit with high input common mode voltage and method for using the same

The present disclosure is directed to a voltage-to-current sensing circuit having a bias terminal configured to receive a reference voltage, an offset terminal configured to receive an offset current, and an operational amplifier configured to output a low voltage signal. The device includes a first amplifier having first and second high voltage inputs configured to receive a first voltage difference across a sense component on a high voltage line and to generate a first current, a second amplifier having first and second low voltage inputs configured to receive a second voltage difference between the bias terminal and the offset terminal and to generate a second current, a summing circuit configured to provide an intermediate voltage corresponding to a sum of the first and the second currents, and a low-voltage transistor coupled to an output of the amplifier and controlled by the intermediate voltage to generate the output current.

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Horomerice, Czechia

Martin Drinovsky