US 11,693,064 B2
Temperature control for Hall bar sensor correction
Yiftah Kowal, Rehovot (IL); and Michael Scherer, Tel Aviv (IL)
Assigned to Corephotonics Ltd., Tel Aviv (IL)
Appl. No. 17/614,571
Filed by Corephotonics Ltd., Tel-Aviv (IL)
PCT Filed Apr. 4, 2021, PCT No. PCT/IB2021/052802
§ 371(c)(1), (2) Date Nov. 29, 2021,
PCT Pub. No. WO2021/220080, PCT Pub. Date Nov. 4, 2021.
Claims priority of provisional application 63/015,576, filed on Apr. 26, 2020.
Prior Publication US 2023/0036881 A1, Feb. 2, 2023
Int. Cl. G01R 33/00 (2006.01); G01D 5/14 (2006.01); H02K 11/215 (2016.01); H02K 41/035 (2006.01); H04M 1/02 (2006.01)
CPC G01R 33/0082 (2013.01) [G01D 5/145 (2013.01); H02K 11/215 (2016.01); H02K 41/0354 (2013.01); H04M 1/026 (2013.01); H04M 2250/12 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A system, comprising:
a voice coil motor (VCM) comprising a magnet-coil arrangement for providing a relative movement therebetween to obtain a relative position;
a Hall sensor located within the coil for sensing the relative movement;
a temperature sensor located in proximity of the Hall sensor for providing temperature sensing; and
a controller having two or more channels coupled to the VCM, to the Hall sensor and to the temperature sensor and configured to control the relative movement between the magnet and the coil of the VCM and to provide, based on the temperature sensing, a temperature correction input to the Hall sensor for compensating a temperature effect on the Hall sensor sensing of the relative movement.