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. 09, 2004
Filed:
Feb. 07, 2003
Method of adjusting the cutoff frequency of an electronic filtering system, and corresponding system
Applicant:
Inventors:
Assignee:
STMicroelectronics SA, Montrouge, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03B 1/00 ; H03K 5/00 ; H04B 1/10 ;
U.S. Cl.
CPC ...
H03B 1/00 ; H03K 5/00 ; H04B 1/10 ;
Abstract
The method includes an adjustment phase in which a filtering device is operated as an oscillator, the frequency of oscillation of the filtering device is determined, and the characteristics of the filtering device are corrected with respect to the determined oscillation frequency and to a pre-established relation between the frequency of oscillation and the theoretical cutoff frequency, in such a way as to confer upon the filtering device a cutoff frequency equal to the theoretical cutoff frequency to within a tolerance. After the adjustment phase, a working phase takes place in which the filtering device carries out its filtering function.