Patent ID: 11899128
Assignee: INFINEON TECHNOLOGIES AG
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A method of calibrating a radio frequency integrated circuit (RFIC) having multiple receiving channels, wherein each of the receiving channels has a mixer, an analog front end (AFE) filter coupled to the mixer, and an analog-to-digital converter (ADC) coupled to the AFE filter, wherein the method comprises:
making a first measurement of the RFIC at a first measuring frequency;
generating a first amplitude estimate and a first phase estimate for a first receiving channel of the RFIC at the first measuring frequency using the first measurement, wherein a first AFE filter of the first receiving channel is bypassed while the first measurement is being made;
making a second measurement of the RFIC at the first measuring frequency;
generating a second amplitude estimate and a second phase estimate for the first receiving channel at the first measuring frequency using the second measurement, wherein the first AFE filter of the first receiving channel is turned on while the second measurement is being made; and
calculating a frequency response of the first AFE filter at the first measuring frequency, comprising:
calculating an amplitude response of the first AFE filter at the first measuring frequency based on the second amplitude estimate and the first amplitude estimate; and
calculating a phase response of the first AFE filter at the first measuring frequency based on the first phase estimate and the second phase estimate.