公开(公告)号：US11899128B2

公开(公告)日：2024-02-13

申请号：US17406645

申请日：2021-08-19

Applicant: Infineon Technologies AG

Inventor： Josef Kulmer ,  Patrick Hoelzl ,  Timo Haf

IPC: G01S7/40 ,  H04B17/29 ,  H04B17/21

CPC classification number: G01S7/40 ,  G01S7/4069 ,  H04B17/21 ,  H04B17/29

Abstract: A method of calibrating an analog front end (AFE) filter of a radio frequency integrated circuit (RFIC) includes: making a first measurement of the RFIC at a first measuring frequency while the AFE filter is bypassed; generating a first amplitude estimate and a first phase estimate at the first measuring frequency using the first measurement; making a second measurement of the RFIC at the first measuring frequency while the AFE filter is turned on; generating a second amplitude estimate and a second phase estimate at the first measuring frequency using the second measurement; and calculating a frequency response of the AFE filter at the first measuring frequency, which includes calculating an amplitude response of the AFE filter based on the second amplitude estimate and the first amplitude estimate; and calculating a phase response of the filter based on the first phase estimate and the second phase estimate.

公开(公告)号：US20230057105A1

公开(公告)日：2023-02-23

申请号：US17406645

申请日：2021-08-19

Applicant: Infineon Technologies AG

Inventor： Josef Kulmer ,  Patrick Hoelzl ,  Timo Haf

IPC: G01S7/40 ,  H04B17/21 ,  H04B17/29

Abstract: A method of calibrating an analog front end (AFE) filter of a radio frequency integrated circuit (RFIC) includes: making a first measurement of the RFIC at a first measuring frequency while the AFE filter is bypassed; generating a first amplitude estimate and a first phase estimate at the first measuring frequency using the first measurement; making a second measurement of the RFIC at the first measuring frequency while the AFE filter is turned on; generating a second amplitude estimate and a second phase estimate at the first measuring frequency using the second measurement; and calculating a frequency response of the AFE filter at the first measuring frequency, which includes calculating an amplitude response of the AFE filter based on the second amplitude estimate and the first amplitude estimate; and calculating a phase response of the filter based on the first phase estimate and the second phase estimate.