Apparatus for ascertaining a rotation rate and for performing a self-test

An apparatus for determining a rotation rate has an oscillatory body 11 on which a plurality of electromechanical converters A, A', B, B', C, C', D, D' are mounted. At least a first converter A, A' is caused to oscillate mechanically by an electric driver signal UF,O generated in a first circuit arrangement 12. Further, at least a second converter D, D' is caused to oscillate mechanically by an electric damping signal UF, D generated in a second circuit arrangement 13. At least a third converter C, C' emits an electric sensor damping signal US, D which corresponds to the oscillation of the body 11 in the location where the at least third converter D, D' is mounted. The damping sensor signal US, D is fed back to the input of the second circuit arrangement 13. A voltage divider 31 is provided, by means of which the signal UF, D generated in the second circuit arrangement 13 can be reduced.