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:
May. 06, 2003
Filed:
Feb. 28, 2001
Applicant:
Inventor:
Johannus Leopoldus Bakx, Eindhoven, NL;
Assignee:
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 5/00 ;
U.S. Cl.
CPC ...
H03K 5/00 ;
Abstract
A self-tracking bandpass filter ( ) comprises a controllable filter ( ) having a signal input ( ) for receiving a signal (&phgr;) to be filtered, a bandpass output ( ) for providing a bandpass signal (S ) having a center frequency (f ), and a control input ( ) for receiving a control signal (S ); and a control unit ( ) coupled to the control input ( ) of the controllable filter ( ), adapted to generate the control signal (S ) in such a way that the center frequency (f ) of the bandpass characteristic (H ) of the controllable filter ( ) is substantially equal to the frequency (f) of the input signal (&phgr;).