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. 26, 2000
Filed:
Jan. 29, 1999
Donald R Cargille, Culver City, CA (US);
Hughes Electronics Corporation, El Segundo, CA (US);
Abstract
A balanced vibratory micro-gyroscope having an electrode pattern having four inner drive electrodes and four outer sense electrodes for providing balanced push-pull control of a cloverleaf micro-gyroscope. A control circuit utilizes equal and opposite input signals to the drive electrodes and processes output signals from the sense electrodes to precisely control the drive electrodes. Capacitance is added between opposing drive and sense electrodes pattern in order to null capacitive coupling effects between adjacent drive and sense electrodes. The control circuit linearizes the force on the micro-gyroscope thereby improving performance. Advantage is taken of Coulomb's Law to eliminate an electronic multiplier in the vibration amplitude control loop. A simplified full-wave rectifier further enhances the control circuit and operation of the micro-gyroscope. A closed negative feedback loop in the control circuit provides a corrective signal to the rate driving electrodes through rate sensing signals in order to prevent unwanted harmonic movement in the micro-gyroscope.