Maryland's Defense Patent Database

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Magnetic sensor with variable sensitivity

Patent image
ARL

A microelectromechanical system (MEMS) device comprising a base structure; a magnetic sensor attached to the base structure and operable for sensing a magnetic field and allowing for a continuous variation of an amplification of the magnetic field at a position at the magnetic sensor; and for receiving a DC voltage and an AC modulation voltage in the MEMS device; a pair of flux concentrators attached to the magnetic sensor; and a pair of electrostatic comb drives, each coupled to a respective flux concentrator such that when the pair of electrostatic comb drives are excited by a modulating electrical signal, each flux concentrator oscillates linearly at a prescribed frequency; and a pair of bias members (mechanical spring connectors) connecting the flux concentrators to one another.

Inventors: 
Edelstein, Alan S.
Patent Number: 
Technical domain: 
Sensors and Measurement
FIle Date: 
2004-11-26
Grant Date: 
2006-05-16
Grant time: 
536 days
Grant time percentile rank: 
9
Claim count percentile rank: 
6
Citations percentile rank: 
1
'Cited by' percentile rank: 
3
Assignee: 
US ARMY