Patent ID: 8539835

Claim:
A sensor responsive to motion comprising: a base; a proof mass for generating a torque in response to motion of the sensor; a sensing frame disposed in a plane coupled to the proof mass, where in the sensing frame moves in response to the torque, the sensing frame comprising: a first rail, constrained to move along a first axis in the plane; a second rail substantially parallel to the first rail, the second rail constrained to move along the first axis; at least two guiding arms for ensuring the first rail and the second rail to move in anti-phase fashion along the first axis; a first guiding arm flexibly coupled to the first rail and flexibly coupled to the second rail; a second guiding arm flexibly coupled to the first rail and flexibly coupled to the second rail; the first guiding arm flexibly suspended to the base at a first anchoring point allowing rotation of the first guiding arm around a second axis that is perpendicular to the first axis and normal to the plane; the second guiding arm flexibly suspended to the base at a second anchoring point allowing rotation of the second guiding arm around the third axis parallel to the second axis; and a transducer for sensing motion of the first and second rails along the first axis.