MEMS chip enables battery-free sensors
December 08, 2011 // R. Colin Johnson
A MEMS chip can harvest energy from vibrations inside car tires allowing a tire pressure monitoring systems (TPMS) to run battery-free, according to Belgian research institute IMEC. The new MEMS energy harvester technology from IMEC, which can be used to power any low-current wireless sensor node, was reported Wednesday at the IEEE International Electron Devices Meeting in Washington.
The maximum output of the MEMS energy harvester was just under 500 microWatts at its natural resonant frequency of 1 KHz. Energy generation dropped to just over 40 microWatts in automobile tire traveling at 40 miles per hour, but was still enough to qualify the part for powering the pressure sensor and wireless communications circuitry for TPMS systems, according to IMEC.
The MEMS energy harvester consists of a cantilever with a piezoelectric layer (aluminum nitride) sandwiched between metallic electrodes to form a capacitor. A mass attached to one end of the cantilever, enables it to act as a transducer converting vibrations into electricity as the piezoelectric layer flexes. The voltage across the capacitor can then be harvested to drive wireless circuits.
IMEC demonstrated that the tiny energy harvesters can be packaged using vacuum processing on six-inch wafers. IMEC predicts that its MEMS energy harvester will be used to power wireless sensor nodes in many applications where changing a battery is inconvenient—from automobile engines to industrial appliances.
Startup's tech is Intel's Quark neural network
July 02, 2015
The pattern-classification technology inside the Quark SE system chip from Intel is the same as that being offered for license ...
A glimpse at the future of printed electronics
Automotive King Redefines Future
Elektrobit is now Bittium
Exploring through-wall presence detection
High-speed converters aid record terabit field trial
July 01, 2015
Ultra high-speed digital-to-analog (DAC) and analog-to-digital (ADC) converters from Socionext Inc. (Yokohama, Japan) have ...
Sony reaches for the crowd with e-paper universal remote
Two-switch-quasi-resonant Flyback converter
Could India's analog wafer fab be moving south?
- Critical Requirements in High Speed Signal Generation Applications
- The 400XAC Series: Two Major Advantages that Simplify Functional Testing
- A Smart Way to Drive ECU Consolidation
- Autonomous Driving: An Eye on the Road Ahead
InterviewCEO interview: Cadence is about enablement, collaboration
EDA companies are being asked to provide expertise from the circuit- to the system-level observes Lip-Bu Tan, CEO of EDA software vendor Cadence Design Systems Inc. Covering such a breadth of endeavour ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Novelda is giving away two full XeThru Inspiration kits worth 1499 US Dollars each, for EETimes Europe's readers to experiment first hand with its XeThru technology.Based on the use of radio waves, rather than infrared, ultrasound or light, the company's X2M1000 Inspiration modules can detect presence just from the chest movement while breathing, and measure both the rate and... MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.