Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [mems]

Microelectromechanical systems (MEMS) are very small electromechanical devices. Common devices made using the technology include accelerometers, gyroscopes and microphones.

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Why the prevelance of mechanical oscillators in electronic circuits?

The clock sources in modern electronics seem to come invariably from quartz and MEMS oscillators, both of which generate vibrations mechanically. The amplitude and frequency of the vibration are orders of magnitudes different from the everday…
Gus
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Why is a MEMS device affected by helium but not hydrogen?

It seems that MEMS is very sensitive to helium, but only helium. This Link stated that hydrogen does not affect MEMS, which surprised me. Does anybody know why it's just helium, or what's really going on? According to the link, an iPhone 8 will stop…
MicroservicesOnDDD
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1000 Hz+ refresh rate displays/ projectors? (for making volumetric displays)

I have found only few volumetric displays for the kind of effect I'm looking for. They can be divided by two characteristics into two separate groups each: rotating or moving screens, and moving screens with a high refresh rate projector projecting…
Leo Ervin
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Limits of dead reckoning using MEMS sensors

I'm trying to track body parts relative to a person's torso. I see quite a few questions about using MEMS accelerometers and gyros for dead reckoning, and they confirm my suspicions that various factors greatly limit their usefulness for these sorts…
Selali Adobor
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Dead reckoning with accelerometer & gyro. Possible?

I have a 3 axis accelerometer and a 3 axis gyroscope. I've been tasked with developing a dead reckoning system using this hardware. Essentially what's needed is for me to develop some code to track the position in 3d space of the board in real time.…
user41883
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Why are MEMS in QFN packages?

I've seen that many (if not all of them) MEMS, like accelerometers, they are only available in QFN packages. Why is that?
MrBit
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Why are accelerometers (and other MEMS devices) so rarely integrated into components?

With the way things are headed, more and more functionality moves into a single chip each year. However, one thing that seems to remain completely untouched by this is MEMS devices like accelerometers and gyros. Despite many device classes…
Azsgy
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Do MEMS accelerometers have a lower frequency limit?

Being a higher level programmer by education I have no deeper knowledge of electronics and electromechanics, so feel no obligation to answer this. I'm wondering about MEMS accelerometers. I heard a claim from a coworker the other day that MEMS…
user2878064
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Reading noise from allan variance plot for MEMS sensor per IEEE Std 952-1997

I am following the Standard Sensor Performance Parameters from the "MemsIndustryGroup" to test some Gyroscopes: I conducted a test and plotted the square root of AVAR (Allan Deviation) against Time per IEEE Std 952-1997 using MATLAB: I am confused…
MrHappyAsthma
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I2S communication

I am designing an audio amplifier circuit which consists of an I2S digital MEMS mic (INMP441) for picking up voice signals and an I2S class-D amplifier (MAX98357A) for amplification. Both these ICs have three lines (Serial Data, Serial Clock, Word…
Sri
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Does MEMS accelerometer stability deteriorate over time?

I am wondering if over time MEMS accelerometer produces any worse output than when it is new? I found this research paper which acknowledges that temperature affect sensor output but there are no conclusions about reading stability over time.
c0dehunter
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What is causing the digital output of my MEMS pressure sensor to decrement continuously?

I'm a lowly mechanical engineer so bear with me. This problem has been the bane of my existence. I'm using a temperature-compensated barometric pressure sensor in a fluid-contacting application. Specifically, TE's MS5803-02BA. This sensor is…
mere engineer
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How is an accelerometer initially calibrated?

Referring to a MEMS accelerometer, how is the laboratory, initial calibration being carried out? Is the gravitational acceleration involved as a reference, or is the actual analog data being interpreted independently of the supposition that the…
teodron
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ADXL345 Accelerometer data rate vs bandwidth

I recently started working with the ADXL345 Accelerometer and got a bit confused on what's the difference between the data rate and bandwidth. From the ADXL345 datasheet p14, we can see the different available data rates and bandwidth : What…
B.Adlane
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Considerations for transmitting the signal from a MEMS microphone over a short cable?

In my application I have the signals from 6 analog MEMS microphones (CUI Devices CMM-3729AT-42108-TR), each amplified by a pair of op-amps in a voltage follower -> inverting amp configuration. The microphones are on tiny PCBs buried deep within a…
Ben S.
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