Frequently Asked Question

Frequency Response
Last Updated 4 months ago

Frequency Response is the bandwidth of signals which our sensors can measure. Normally the MEMS itself has already a frequency response (e.g. 0-18Hz), for a better output, we have also designed extra low pass filters.

The movements/vibrations are unwanted signals when you are measuring the angle. That’s why we set the -3dB cut-off frequency to 10Hz, which means 0-10Hz signals will pass through and >10Hz will be significantly attenuated. In this way, we can have a stable angle information with much less noise.


This picture below will give you an idea. As a result, the output you see will have a little delay due to the filter time.


image

image

(e.g. 30KHz goes through, and 300Khz signals are attenuated to almost half of its amplitude and has a phase shift)



For more knowledge over frequency response and low pass filter, please find it here:

https://en.wikipedia.org/wiki/Frequency_response

https://www.electronics-tutorials.ws/filter/filter_2.html

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