The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 12, 2000
Filed:
Oct. 10, 1996
Kazuhiro Ebara, Toyama, JP;
Katsumi Fujimoto, Toyama-ken, JP;
Hiroshi Nishiyama, Toyama, JP;
Takeshi Nakamura, Uji, JP;
Abstract
A vibration gyroscope 10 includes a vibrator 12. The vibrator 12 has a vibration member 14 formed in a regular triangular prism shape. On side faces of the vibration member 14, piezoelectric elements 16a, 16b and 16c are formed. Two of the piezoelectric elements 16a and 16b are connected to resistors 26 and 28, respectively. Between the other feedback piezoelectric element 16c and these resistors, an oscillation circuit 30 is connected. A signal having a phase opposite to that of the signal output from the feedback piezoelectric element 16c is input to the vibration member 14 serving as a grounding terminal by a phase inverter 34. The signals output from the two piezoelectric elements 16a and 16b are input to a differential circuit 36. The differential circuit 36 is connected to a synchronous detection circuit 38 and connected to a smoothing circuit 40 and a DC amplifier 42 in series.