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:
Nov. 22, 2011
Filed:
Aug. 30, 2006
Dario Giotta, Travisio, IT;
Thomas Poetscher, Villach, AT;
David San Segundo Bello, Villach, AT;
Andreas Wiesbauer, Poertschach, AT;
Dario Giotta, Travisio, IT;
Thomas Poetscher, Villach, AT;
David San Segundo Bello, Villach, AT;
Andreas Wiesbauer, Poertschach, AT;
Lantiq Deutschland GmbH, Neubiberg, DE;
Abstract
A self-oscillating driver circuit comprises a driver stage, a feedforward path which is coupled to an input of the driver stage, and a feedback path which couples an output of the driver stage to an input of the feedforward path. The feedforward path comprises a feedforward filter which is designed as an active filter. In order to prevent an oscillatory state of the driver circuit at an unwanted frequency, it is proposed that an internal state variable of the feedforward filter be monitored and that the feedforward filter be reset if the value of the monitored internal state variable is outside a predefined range.