A micromachined z-axis rate gyroscope with multidirectional drive-mode has an increased drive-mode bandwidth for relaxing mode-matching requirement in which the drive and sense modes are completely decoupled. By utilizing multiple drive-mode oscillators with incrementally spaced resonance frequencies,...http://www.google.com/patents/US7100446?utm_source=gb-gplus-sharePatent US7100446 - Distributed-mass micromachined gyroscopes operated with drive-mode bandwidth enhancement
