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:
Oct. 08, 2013
Filed:
Sep. 01, 2006
Bernhard Michalski, Maulburg, DE;
Dominik Buser, Thürneu, CH;
Stefan Scherr, Kandern, DE;
Endress + Hauser GmbH + Co. KG, Maulburg, DE;
Abstract
An apparatus for ascertaining and monitoring a fill level and includes a transmitting/receiving unit and a delay circuit. The delay circuit includes at least a sampling clocking oscillator, which produces a sampling signal having a sampling frequency, a transmission clocking oscillator, which produces a pulse repetition signal having a pulse repetition frequency, and a frequency converter, which produces by means of sequential sampling a difference signal. The apparatus further includes a control/evaluation unit, which determines on the basis of travel time the fill level. Provided on the control/evaluation unit is an external clocking input, which is connected via a clocking line with a first clocking output of the sampling clocking oscillator or with a second clocking output of the transmission clocking oscillator. A stabilized and cost-favorable control circuit for producing an intermediate frequency signal with a highly accurately determinable, transformation factor results.