RESACC
Development of a readout circuit for a resonant accelerometer
| Coordinatore | CSEM CENTRE SUISSE D'ELECTRONIQUE ET DE MICROTECHNIQUE SA - RECHERCHE ET DEVELOPPEMENT
Organization address
address: RUE JAQUET DROZ 1 contact info |
| Nazionalità Coordinatore | Switzerland [CH] |
| Totale costo | 795˙630 € |
| EC contributo | 596˙722 € |
| Programma | FP7-JTI
Specific Programme "Cooperation": Joint Technology Initiatives |
| Code Call | SP1-JTI-CS-2012-01 |
| Funding Scheme | JTI-CS |
| Anno di inizio | 2013 |
| Periodo (anno-mese-giorno) | 2013-01-01 - 2015-03-31 |
Partecipanti
| # | ||||
|---|---|---|---|---|
| 1 |
CSEM CENTRE SUISSE D'ELECTRONIQUE ET DE MICROTECHNIQUE SA - RECHERCHE ET DEVELOPPEMENT
Organization address
address: RUE JAQUET DROZ 1 contact info |
CH (NEUCHATEL) | coordinator | 440˙797.50 |
| 2 |
HMT MICROELECTRONIC AG
Organization address
address: ALFRED AEBI STRASSE 75 contact info |
CH (BIEL) | participant | 155˙925.00 |
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Obiettivo del progetto (Objective)
'The purpose of the present project is to develop an ASIC implementing a readout interface for a resonant accelerometer. It is developed in response to the requirements described in the Clean Sky call for proposals referenced under CS-2012-01-SFWA-01-046 and the specifications the topic manager will provide at the beginning of the project. Resonant accelerometers offer the advantage over capacitive ones to be less sensitive to radiations, which makes them ideal candidates for harsh environments applications. Whereas capacitive accelerometers exploit the change of capacitance of an element such a MEMS when it is subject to acceleration, resonant accelerometers detect the shift of the resonant frequency of a device when it is subject to acceleration. The consortium is composed of two partners, CSEM and HMT, which both have a long track record in the design of integrated circuits apart from having complementary expertise, covering all the aspects of the project. CSEM has a recognized experience in low power and low voltage design of analogue and digital circuits, as well as wide competencies in the design of complex System-on-Chip (Soc).. HMT is specialized in 'mixed signal' ASICs and modules, particularly for sensors and actuators in highly demanding fields.'
Introduzione (Teaser)
EU-funded scientists are developing an integrated circuit (IC) for resonant accelerometers that has both analogue and digital components to digitally display acceleration values.
Descrizione progetto (Article)
Resonant accelerometers are often microelectromechanical systems (MEMS) that measure acceleration by sensing the difference in the resonant frequencies of its two resonators.
The fact that they are resistant to ionising radiation also makes them suitable for space applications.
However, very few readout ICs for resonant MEMS accelerometers have been hitherto demonstrated, and often without digital display.Against this backdrop, the EU-funded project 'Development of a readout circuit for a resonant accelerometer' (http://www.resacc-project.eu (RESACC)) is developing an application-specific integrated circuit (ASIC), a microchip for a resonant MEMS accelerometer.
RESACC will combine an analogue sensor interface and a digital output on a single chip.
The frequency-shift measurement of the MEMS will provide input to the ASIC to deliver digital display of acceleration.Focus was laid on the architecture of the sensor interface and the detailed design specifications of each block that the ASIC contains.
Specifically, two oscillator blocks are each connected to a resonator of the MEMS.
Furthermore, the ASIC includes a damping block.
Less critical parts, such as oscillator, voltage regulator and non-volatile memory are not included; instead, external components are used.The project team has built models of the oscillator and damping blocks during the specification phase.
Moreover, they have developed the layout of the ASIC.
Nearly all sub-blocks have been designed and separately validated, and are in the process of being assembled together for validation.RESACC is expected to develop an integrated sensor interface circuit with digital output of acceleration that reduces the energy requirements of high-performance resonant accelerometers, with power consumption well below 100 milli watts.