Patent ID: 7360422

Claim:
A sensor comprising: a sensor anchor part; a sensor supporting structure; beams coupled between said sensor supporting structure and said sensor anchor structure; a mass; a beam supporting structure, coupled between said sensor supporting structure and said mass, allowing movement of said mass in a first plane; first and second sensor portions, located and coupled to said mass on opposite sides of said beam supporting structure, adjacent edges of said mass and sensing said movements of said mass in said first plane; third and fourth sensor portions, coupled between said sensor supporting structure and said sensor anchor part on an opposite side of the beam supporting structure where the first and second sensor portions are located and being at positions closer to a center of the beam supporting structure than the first and second sensor portions, said third and fourth sensor portions to sense movements of said mass and an electrical connection that connects said first, second, third and fourth sensor portions in a Wheatstone bridge with said first and third sensor portions forming a first half of the Wheatstone bridge and said second and fourth sensor portions forming a second half of the Wheatstone bridge, said Wheatstone bridge to measure a phase difference between movements sensed by said first and third portions and movements sensed by said second fourth portions.