Magnetic field sensor
AssigneeAllegro MicroSystems, LLC
InventorsDavid J. Haas, Michael Gaboury, Alexander Latham
Life of this patent
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Abstract
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. In a further aspect, a current sensor has a bandwidth of 1 MHz and includes a chopper stabilized amplifier and a plurality of Hall quad elements, fabricated in silicon, in parallel and connected to the chopper stabilized amplifier.
Claims17
A magnetic field sensor comprising:
- a chopper stabilized amplifier;
- and a plurality of at least three Hall-type elements electrically connected in parallel to each other and electrically connected to the chopper stabilized amplifier, wherein the plurality of at least three Hall-type elements ace a plurality of at least four Hall-type elements disposed in a configuration to include an equal number of at least two Hall-type elements disposed on each side of a U-shaped conduction loop, wherein the at least two Hall-type elements disposed inside the U-shaped conduction loop are disposed in an opposite polarity than the at least two Hall-type elements disposed outside the U-shaped conduction loop.
A magnetic field sensor comprising:
- a chopper stabilized amplifier;
- and a plurality of at least three Hall quad elements electrically connected in parallel to each other and electrically connected to the chopper stabilized amplifier, wherein the plurality of at least three Hall quad elements are a plurality of at least four Hall quad elements disposed in a configuration to include an equal number of at least two Hall quad elements on each side of a U-shaped conduction loop, wherein the at least two Hall quad elements disposed inside the U-shaped conduction loop are disposed in an opposite polarity than the at least two Hall quad elements disposed outside the U-shaped conduction loop.
A current sensor comprising:
- a chopper stabilized amplifier;
- and a plurality of at least three Hall quad elements electrically connected in parallel to each other and electrically connected to the chopper stabilized amplifier, the plurality of Hall quad elements fabricated in silicon, wherein the current sensor has a bandwidth of 1 MHz, wherein the plurality of at least three Hall quad elements are a plurality of at least four Hall quad elements disposed in a configuration to include an equal number of at least two Hall quad elements disposed on each side of a U-shaped conduction loop, wherein the at least two Hall quad elements disposed inside the U-shaped conduction loop are disposed in an opposite polarity than the at least two Hall quad elements disposed outside the U-shaped conduction loop.
Dependencies are inferred from the claim text.