Patent ID: 11858808
Assignee: INFINEON TECHNOLOGIES AG
Field: Audio-visual technology (Electrical engineering)
Classification: CPC B  H | IPC B  H

Claim 16:
17. A method of operating a digital microphone, the digital microphone including a microelectromechanical (MEMS) device and a cross-talk compensation component including a power profile reconstruction component configured for reconstructing a power profile of the digital microphone in communication with the MEMS device, wherein the power profile represents power consumption of the digital microphone over time between at least two operational modes of the digital microphone, and a reconstruction filter configured for modeling thermal and/or acoustic properties of the digital microphone, and further includes a subtractor having a first input configured for receiving a signal from the digital microphone, a second input coupled to the cross-talk compensation component, and an output configured for providing a digital output signal;
the method comprising:
converting an analog input signal from the MEMS device using an analog-to-digital converter (ADC) in the digital microphone;
reconstructing the power profile using the power profile reconstruction component;
determining, from the reconstructed power profile, a cross-talk estimate of the digital microphone using the cross-talk compensation component; and
subtracting the cross-talk estimate from an output signal of the ADC to generate a digital output signal corresponding to the analog input signal from the MEMS device.