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:
Feb. 05, 2008
Filed:
Dec. 06, 2003
Sascha D'angelico, Efringen-Kirchen, DE;
Sascha D'Angelico, Efringen-Kirchen, DE;
Endress + Hauser GmbH + KG, Maulburg, DE;
Abstract
A device for operating an oscillatable unit of a vibration resonator, including a piezodrive, which is connected with the oscillatable unit, and feedback electronics. The feedback electronics excites the piezodrive to oscillate by means of a periodic exciter signal having rising and falling edges. The response signal of the piezodrive is fed back to the feedback electronics. Present additionally is at least one peak compensation unit, which removes from the response signal at least one interference signal, which results from the charge-reversal process of the piezodrive. Provided in the peak compensation unit, is at least one suppression unit having at least one switch element. The suppression unit is controlled by the exciter signal of the feedback electronics in such a manner that the piezodrive is connected conductively to ground during the rising and/or during the falling edges of the exciter signal.