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19 Jun 2014

rcj_Knowles_MEMS_Ultrasonic_Microphone_2

Ultrasonic MEMS microphones can image where your hands are without touching the screen, adding a new dimension of 3-D gesture control to smartphones and tablets: R. Colin Johnson @NextGenLog

Ultrasonic Mic Adds 3-D Mid-Air Control to Smartphones and Tablets – [Link]

12 Jun 2014

SiT8008-resonatorby zeptobars.ru:

SiTime SiT8008 is a programmable MEMS oscillator reaching quartz precision but with higher reliability and lower g-sensitivity. Also SiTime is one of companies who received investments from Rosnano – Russian high-tech investment fund.

The trick is that to reach maximum Q-factor (up to ~186’000 according to patents) MEMS resonator must operate in vacuum. So they package resonator _inside_ the die in hydrogen atmosphere, then anneal it in vacuum so that hydrogen escapes through silicon. So we see here only a cap with contacts to “buried” MEMS resonator. We were unable to reach the resonator itself without x-ray camera or ion mill.

SiTime SiT8008 – MEMS oscillator : die-shot - [Link]

6 Jun 2014

F3Sizex600

by Steve Taranovich:

I recently spoke to Piyush Sevalia, Executive Vice President, Marketing at SiTime Corporation,about their newly introduced 32 kHz TCXO (temperature compensated oscillator) which they claim to be the smallest, lowest power device in the industry. With its tiny footprint and ultra-low power consumption, the SiT1552 MEMS TCXO decreases the size and increases battery life of wearable electronics and Internet of Things (IoT); such benefits are not achievable from legacy quartz devices.

SiTime enters wearables, IoT markets with 32 kHz MEMS TCXO - [Link]

16 May 2014

F3x600

by John Widder & Alessandro Morcelli :

The application of MEMS (Micro Electro-Mechanical Systems) technology to microphones has led to the development of small microphones with very high performance. MEMS microphones offer high SNR, low power consumption, good sensitivity, and are available in very small packages that are fully compatible with surface mount assembly processes. MEMS microphones exhibit almost no change in performance after reflow soldering and have excellent temperature characteristics.

Basic principles of MEMS microphones - [Link]


3 Apr 2014

rcjGE_MEMS_switch_4G

The era of the MEMS switch may finally be here thanks to the research efforts of GE. Its MEMS chip, as small as 50 microns square, swathes as fast as 3 GHz and can handle up to 5-kiloWatts of power, making it a candidate for everything from industrial power control, to turning on light bulbs to switching antennas inside a smartphone.

MEMS Switch from GE claims fastest/highest Power Crown - [Link]

30 Dec 2013

mpu6050

Invensense MPU6050 is an integrated gyroscope and accelerometer with 16-bit readings. It contains 2 dies, soldered face-to-face in multiple places (that’s what was causing us troubles last time!).

On the overview photo you can see how not-flat they are. On a bigger die MEMS part is 28µm above surface, on smaller die – 100 µm above. Also, there is logic right under MEMS on the bigger die.

Invensense MPU6050 6-axis MEMS IMU die-shot - [Link]

11 Sep 2013

0908mems_fig_3

The broad benefit of MEMS technology is that it will allow high-volume, small-package technology and batch semiconductor manufacturing to replace the complex manufacturing processes associated with quartz. Since the final product is a silicon die, MEMS can be co-packaged (overmolded) with associated ICs, enabling further benefits in manufacturability, size, compatibly, ease-of-use, and, of course, lower total system cost. Finally, MEMS is more immune to shock, vibration, and electromagnetic interference (EMI) than quartz; can be designed to be free of “activity dips”; and can support operating temperature ranges beyond -40°C to +85°C. (by Todd Borkowski)

Time for a change: Quartz oscillators make way for MEMS - [Link]

10 Sep 2013

adafruit_2073

Check out the awesome photo of the MEMS cavity on page 8! – [via]

Awesome photo of the MEMS cavity - [Link]

30 Aug 2013

This is a collection of Maxim’s newest real-time clock ICs.

39aac6d2082b4fff1c5e1db589abb5deA real-time clock with lots of features including a version with an integrated crystal.

770e5cde575dd5ec1ccec8a85d4c7883This real-time clock IC operates with very low current and is compatible with high-ESR crystals for a space saving, low-cost design. Read the rest of this entry »

27 Aug 2013

rcjEpsonIMU

Epson has combined the reliability of quartz crystals with the tiny dimensions of MEMS devices to create a tiny high-resolution six degree-of-freedom inertial measurement unit that can track motion for everything from aerospace to oil-well drilling. [via]

Epson Downsizes Inertial Measurement Units - [Link]



 
 
 

 

 

 

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