US 12,078,695 B2
Magnetic field sensor with overcurrent detection
Jochen Schmitt, Biedenkopf (DE); and Gavin P. Cosgrave, Enniscorthy (IE)
Assigned to Analog Devices International Unlimited Company, Limerick (IE)
Filed by Analog Devices International Unlimited Company, Limerick (IE)
Filed on Apr. 7, 2022, as Appl. No. 17/715,811.
Claims priority of provisional application 63/173,903, filed on Apr. 12, 2021.
Prior Publication US 2022/0326321 A1, Oct. 13, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G01R 33/09 (2006.01); G01R 19/165 (2006.01)
CPC G01R 33/096 (2013.01) [G01R 19/16533 (2013.01); G01R 33/091 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A magnetic field sensor system, comprising:
an anisotropic-magnetoresistive (AMR) magnetic field sensor configured to measure an externally applied magnetic field; and
an overcurrent detection sensor comprising at least one AMR sensing element, the overcurrent detection sensor being configured to detect a presence of a high electrical current based on a measurement of the externally applied magnetic field, wherein the overcurrent detection sensor comprises a field-insensitive component comprising at least two AMR barber pole resistors comprising a strip of anisotropic-magnetoresistive material having a plurality of conductive strips disposed on the strip of anisotropic-magnetoresistive material at an angle relative to a longitudinal axis of the strip of anisotropic-magnetoresistive material, the at least two AMR barber pole resistors being connected in series and having conductive strips orientated in opposing directions.