Magnetometer having an electromechanical resonator

Details Magnetometer having an electromechanical resonator Magnetometer having an electromechanical resonator

2006-05-09

2006-05-09

Mis, David (Department: 2817)

Electricity: measuring and testing

Magnetic

Magnetometers

C331S065000

Reexamination Certificate

active

07042213

ABSTRACT:
In one embodiment, a magnetometer includes an electromechanical resonator coupled to a drive-and-detect (DD) circuit. The resonator has a deformable beam that is a part of a closed current path. By applying a periodic drive signal to a drive electrode located in proximity to the deformable beam, the DD circuit induces an oscillation of the beam. In the presence of a magnetic field, this oscillation changes the magnetic flux through the closed current path, thereby generating an oscillating electrical current in the path. Dissipation of this current due to resistive losses in the closed current path then dampens the oscillation of the deformable beam with a damping coefficient that depends on the magnetic-field strength. Using a sense electrode located in proximity to the deformable beam, the DD circuit detects the oscillation amplitude. Based on the detected amplitude, the DD circuit changes the frequency of the drive signal to find the resonant frequency. Since the resonant frequency depends on the damping coefficient, the magnetic-field strength can be deduced in a relatively straightforward manner from the resonant frequency.

REFERENCES:
patent: 5442288 (1995-08-01), Fenn et al.
patent: 5644230 (1997-07-01), Pant et al.
patent: 5731703 (1998-03-01), Bernstein et al.
patent: 5998995 (1999-12-01), Osiander et al.
patent: 6714007 (2004-03-01), Youngner
“Theory of Amplifier-Noise Evasion in an Oscillator Employing a Nonlinear Resonator,” by B. Yurke et al., Physical Review A, May 1995, vol. 51, No. 5, pp. 4211-4229.

Affiliated with

Also associated with

Rating

Magnetometer having an electromechanical resonator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magnetometer having an electromechanical resonator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetometer having an electromechanical resonator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3547035