Hi,

See these links.

Vibrating structure gyroscope

http://www.invensense.com/shared/pdf/MEMSGyroComp.pdf
http://www.analog.com/library/analog...37-03/gyro.pdf
http://www.nec-tokin.com/english/pro...ramicgyro.html
http://www.nec-tokinamerica.com/prod...ts/pd-057e.pdf

Best regards,

Luciano