MEMS microphones Forum Discussions

Hello,

I am currently developing a nine axis sensor attitude fusion algorithm. The chip manufacturer provides a sensor data fusion algorithm library, but does not support Infineon's development platform because Infineon's chip architecture is quite unique. Does Infineon officially provide a MEMS sensor data fusion algorithm?

Hello,

I recently asked about how the mic IM70A135 could be used single-ended, the reply was basically no. When asking for samples the reply was: try with a IM70A135 evaluation board, including a link.

Good idea, but there is no evaluation board available anywhere.
So this was NOT helpful at all.

So, do these evaluation boards exist at all, at least somewhere? If yes, how to get them?

These pin-less SMD mics cannot really be tested by wiring, because surely the PCB mounting (acoustic port hole) affects the characteristics too much. And making a PCB for a product which is probably never used is too costly.

Hello

We have developed a multi-channel microphone based on IM69D120 and stm32H7. Analyzing the signal from the microphone, we saw a transient process lasting 4 seconds - a displacement of the constant component. If a modulated signal from a generator is applied to the input of the delta-sigma controller, then such a transient process is not observed. The amount of emission is different for all microphones. both the amplitude and the settling time change.

The settings for the reading channels are the same. What is the reason for this behavior? Which ones can be fixed?