公开(公告)号：US20220244322A1

公开(公告)日：2022-08-04

申请号：US17587109

申请日：2022-01-28

Applicant: Infineon Technologies AG

Inventor： Mario MOTZ ,  Qinwen FAN ,  Amirhossein JOUYAEIAN ,  Kofi MAKINWA

IPC: G01R33/00 ,  H03F3/45 ,  G01R15/18

Abstract: The present disclosure relates to a magnetic field sensor circuit including at least one coil for measuring a magnetic field, a first stage amplifier circuit coupled to the coil and having a first transfer function with a pole at a first frequency, and a second stage amplifier circuit coupled to an output of the first stage amplifier circuit and having a second transfer function with a zero at the first frequency. In some embodiments, a temperature dependent frequency drift of the pole of the first transfer function corresponds to a temperature dependent frequency drift of the zero of the second transfer function.