公开(公告)号：US11668767B2

公开(公告)日：2023-06-06

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 ,  G01R15/18 ,  H03F3/45 ,  G01R15/20 ,  G01R33/07 ,  G01R19/32

CPC classification number: G01R33/0023 ,  G01R15/18 ,  G01R15/202 ,  G01R19/32 ,  G01R33/07 ,  H03F3/45475 ,  G01R33/0082 ,  G01R33/075

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.

公开(公告)号：US20240085217A1

公开(公告)日：2024-03-14

申请号：US18519430

申请日：2023-11-27

Applicant: Infineon Technologies AG

Inventor： Mario Motz ,  Amirhossein Jouyaeian ,  Kofi Makinwa

IPC: G01D5/14 ,  G01R33/09 ,  H03M3/00

CPC classification number: G01D5/145 ,  G01R33/09 ,  H03M3/368 ,  H03M3/458

Abstract: The described techniques address issues associated with hybrid current or magnetic field sensors used to detect both low- and high-frequency magnetic field components. The hybrid sensor implements a DC component rejection path in the high-frequency magnetic field component path. Both digital and analog implementations are provided, each functioning to generate a DC component cancellation signal to at least partially cancel a DC component of a current signal generated via the high-frequency magnetic field component path. The hybrid sensor provides a high-bandwidth, high-accuracy, and low DC offset hybrid current solution that also eliminates the need for DC decoupling capacitors in the high-frequency path. A modification is also described for implementing a Sigma-Delta (ΣΔ) quantization noise reduction path to reduce the quantization noise and to improve accuracy.

公开(公告)号：US12163808B2

公开(公告)日：2024-12-10

申请号：US18519430

申请日：2023-11-27

Applicant: Infineon Technologies AG

Inventor： Mario Motz ,  Amirhossein Jouyaeian ,  Kofi Makinwa

IPC: G01R33/09 ,  G01D5/14 ,  H03M3/00

Abstract: The described techniques address issues associated with hybrid current or magnetic field sensors used to detect both low- and high-frequency magnetic field components. The hybrid sensor implements a DC component rejection path in the high-frequency magnetic field component path. Both digital and analog implementations are provided, each functioning to generate a DC component cancellation signal to at least partially cancel a DC component of a current signal generated via the high-frequency magnetic field component path. The hybrid sensor provides a high-bandwidth, high-accuracy, and low DC offset hybrid current solution that also eliminates the need for DC decoupling capacitors in the high-frequency path. A modification is also described for implementing a Sigma-Delta (ΣΔ) quantization noise reduction path to reduce the quantization noise and to improve accuracy.

公开(公告)号：US11828625B2

公开(公告)日：2023-11-28

申请号：US17713701

申请日：2022-04-05

Applicant: Infineon Technologies AG

Inventor： Mario Motz ,  Amirhossein Jouyaeian ,  Kofi Makinwa

IPC: H03F3/45 ,  G01D5/14 ,  H03M3/00 ,  G01R33/09

CPC classification number: G01D5/145 ,  G01R33/09 ,  H03M3/368 ,  H03M3/458

Abstract: The described techniques address issues associated with hybrid current or magnetic field sensors used to detect both low- and high-frequency magnetic field components. The hybrid sensor implements a DC component rejection path in the high-frequency magnetic field component path. Both digital and analog implementations are provided, each functioning to generate a DC component cancellation signal to at least partially cancel a DC component of a current signal generated via the high-frequency magnetic field component path. The hybrid sensor provides a high-bandwidth, high-accuracy, and low DC offset hybrid current solution that also eliminates the need for DC decoupling capacitors in the high-frequency path. A modification is also described for implementing a Sigma-Delta (ΣΔ) quantization noise reduction path to reduce the quantization noise and to improve accuracy.

公开(公告)号：US20230314176A1

公开(公告)日：2023-10-05

申请号：US17713701

申请日：2022-04-05

Applicant: Infineon Technologies AG

Inventor： Mario Motz ,  Amirhossein Jouyaeian ,  Kofi Makinwa

IPC: G01D5/14 ,  G01R33/09 ,  H03M3/00

CPC classification number: G01D5/145 ,  G01R33/09 ,  H03M3/458 ,  H03M3/368

Abstract: The described techniques address issues associated with hybrid current or magnetic field sensors used to detect both low- and high-frequency magnetic field components. The hybrid sensor implements a DC component rejection path in the high-frequency magnetic field component path. Both digital and analog implementations are provided, each functioning to generate a DC component cancellation signal to at least partially cancel a DC component of a current signal generated via the high-frequency magnetic field component path. The hybrid sensor provides a high-bandwidth, high-accuracy, and low DC offset hybrid current solution that also eliminates the need for DC decoupling capacitors in the high-frequency path. A modification is also described for implementing a Sigma-Delta (ΣΔ) quantization noise reduction path to reduce the quantization noise and to improve accuracy.