Questions tagged [mems]
Microelectromechanical systems (MEMS) are very small electromechanical devices. Common devices made using the technology include accelerometers, gyroscopes and microphones.
121 questions
0 votes
1 answer
70 views
ESP32 (TTGO T-Beam) I2S Stereo Mic Setup (ICS-43434) Reads Consistent Zeroes
I am kind of new in the field and I am attempting to set up a stereo I2S microphone array using two ICS-43434 MEMS microphones on an ESP32 TTGO T-Beam board. My code successfully compiles and runs, ...
- 11
1 vote
2 answers
122 views
Larger voltage swing from crystal oscillator after attenuation
I use a MEMs crystal oscillator SiT8008BI-13-33E-24.000000E to drive two ICs.I power the oscillator from 3.3V for the first IC. For the second IC, a USB HUB (USB2640) I need to step the voltage down ...
- 4,314
1 vote
0 answers
90 views
MEMS Microphone + Amplification Selection
I'm in the process of designing a battery powered microphone sensor for wildlife monitoring, specifically recording wildlife in forests. I want to design a system that uses a MEMS microphone that can ...
1 vote
1 answer
73 views
How did my grounding work on an analog sensor
I used an analog sensor to detect break signals in a concrete beam. During the test setup I noticed that the sensor had completely different noise levels depending on whether or not it was grounded. ...
- 21
0 votes
0 answers
133 views
Simple Audio Amplifier Solution for MEMS Speaker
I would like to use the MEMS speaker ADAP UT-P2023 from USound (https://usound.com/product/ganymede/). The datasheet recommends the LM48580 ceramic speaker amplifier (class-H), which features an ...
1 vote
1 answer
102 views
How to calculate the 0 g offset of an accelerometer versus the upper and lower temperature limits?
I'm verifying the Bosch SMI230 accelerometer, and the documentation states that the zero-g offset temperature drift is ±0.2 mg/K. I want to calculate the upper and lower limit values for the 0 g ...
- 11
0 votes
2 answers
338 views
Understanding capacitive reading out circuit for mems accelerometer
I am trying to understand how the circuit on the left of the following picture produces the output on the right. The picture is a (simplified) model of a readout circuit for a mems accelerometer from ...
- 966
3 votes
4 answers
274 views
Why is my differential equation for mass-spring-damper model not converging with ode45 in MATLAB?
I am trying to simulate an electronical device that can be modeled by a mass-spring-damper system with an additional non-linear force. The equation at the equilibrium for the system is the following : ...
- 31
1 vote
2 answers
180 views
How do I measure 'one year bias stability' in a MEMS gyroscope?
SBG tells what's the one year bias stability, but how do i measure this error parameter? What I want to know is, what formula does SBG use to calculate this error parameter? I'm not concerned about ...
- 13
0 votes
4 answers
193 views
Should I use a metallic enclosure for my low-noise circuit?
I am trying to design an ultra-low-noise pre-amplification stage for a MEMS. The amplification consists of a non-inverting amplifier specifically chosen to have less than 4 nV/sqrt(Hz) as input ...
- 3
0 votes
0 answers
40 views
Who is the manufacturer of the Y31 5133 mic?
My question is in this PCBA I need the information of the who is the manufacturers of the mic the full details of that mic...
- 1
0 votes
1 answer
190 views
How to calculate decibel from digital MEMS microphone
I built 3x3 microphone array using ICS-52000 MEMS microphones and Teensy 4.1 MCU to get data from those mics. I also wrote code in MATLAB to get data via serial port from Teensy. ICS-52000 are 24 bit ...
- 69
2 votes
5 answers
462 views
Clock Signal over long distance
I'm building microphone array using 16 ICS-52000 MEMS microphones and I propably have problem with clock singal because of the long distance. Below is output signal of the 8 microphone I have already ...
- 69
3 votes
2 answers
173 views
Weird behavior with SCK signal on breadboard
I'm working on my microphone array and I have problem with signal. I'm using 16 microphones adn Teensy 4.1 MCU and breadboard to connect everything. I also designed PCB for MEMS microphones ICS-52000. ...
- 69
0 votes
2 answers
140 views
MEMS Microphone Convert V to dBV
At first is sampled data from the IMP23ABSU MEMS mic converted to V by multiplying each sample by the conversion factor \$ \frac{1}{32786} \$. Then i want to calculate the FFT and PSD after applying a ...
- 41