| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibrational gyro having stable sensitivity-temp. characteristics and good temp. drift characteristics. SOLUTION: The vibrational gyro comprises a vibrator 12 having piezoelectric elements 16a, 16b connected to the inputs 20a, 20b of a summing amplifier 20 forming a part of feedback loop. This amplifier 20 uses an operational amplifier with a positive-temp. coefficient thermistor connected between the output and inverted input of the amplifier as a corrector element for correcting the sensitivity-temp. characteristics. The summing amplifier circuit 20 is connected at the output 20c to one input of a phase shifter circuit 22 forming another part of the feedback loop and also to other input of the phase shifter circuit 22 through an AGC circuit 24. The output of the phase shifter circuit 22 is connected to a piezoelectric element 16c of the vibrator 12. |
