Patent ID: 8561466

Claim:
An apparatus, comprising: a two-dimensional oscillator having a beam containing two principal elastic axes and two principal damping axes, the beam being surrounded by electrodes comprised of forcer electrodes and pickoff electrodes; a rate and quad servo operatively coupled to the electrodes; a dither servo operatively coupled to the electrodes; a driven axis of the beam acting along one of the orthogonal principal elastic axes; for a dither drive, forcer electrodes driven approximately equally in either a normal mode of vibration and a reverse mode of vibration; wherein in the normal mode, a sum of outputs of the pickoff electrodes is used for driving the beam and a difference of the outputs of the pickoff electrodes is nulled by a capture servo coupled to the electrodes, and wherein in the reverse mode, a difference of the outputs of the pickoff electrodes is used for driving the beam and a sum of the outputs of the pickoff electrodes is nulled by the capture servo.