Driving circuit for gyroscope

Details Driving circuit for gyroscope Driving circuit for gyroscope

1995-12-06

1997-06-03

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

7350412, 310321, H01L 4108

Patent

active

056357877

ABSTRACT:
A driving circuit (30) includes an oscillation circuit (32). An input terminal of the oscillation circuit (32) is connected to a feedback piezoelectric element (16a) of a vibratory gyroscope (10). The oscillation circuit (32) is designed to amplify a feedback signal from the feedback piezoelectric element (16a). An output terminal of the oscillation circuit (32) is connected to a first input terminal of an AGC circuit (42), via a phase-shifting circuit (36) for adjusting a phase. The feedback piezoelectric element (16a) is connected to a second input terminal of the AGC circuit (42). An output terminal of the AGC circuit (42) is connected to driving and detecting piezoelectric elements (16b) and (16c). The AGC circuit (42). is designed to suppress the voltage of the driving signal to the driving and detecting piezoelectric elements (16b) and (16c), in response to the voltage of the feedback signal from the feedback piezoelectric element (16a).

REFERENCES:
patent: 4479098 (1984-10-01), Watson
patent: 5049776 (1991-09-01), Ogawa
patent: 5220833 (1993-06-01), Nakamura
patent: 5270607 (1993-12-01), Terajima
patent: 5349857 (1994-09-01), Kasanami et al.

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