Driving and detecting circuit of a vibrator.

摘要

First switching elements 28, 30 and resistors 36, 38 are connected to piezoelectric elements 16a, 16b of a vibrating gyroscope 12. An oscillation circuit 32 and a phase correction circuit 34 are connected between a piezoelectric element 16c and the first switching elements 28, 30. The piezoelectric elements 16a, 16b are connected to a differential circuit 40, and an output signal of the differential circuit 40 is applied to a sampling hold circuit 44 via a second switching element 42. A zero-crossing detector 46 is connected to the phase correction circuit 34. The first switching elements 28, 30 are turned OFF, and the second switching element 42 is turned ON when zero-crossing points of driving signal is detected.