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:
Sep. 14, 2004
Filed:
Jan. 23, 2002
Applicant:
Inventors:
Dominicus Martinus Wilhelmus Leenaerts, Eindhoven, NL;
Eise Carel Dijkmans, Eindhoven, NL;
Assignee:
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Attorney:
Primary 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
A filter ( ) is described, which filter is provided with field effect (FET) capacitors (M ; M′ ) arranged for controlling their respective capacity values, each such FET capacitor (M ; M′ ) having a source (S) and a drain (D). The source (S) and the drain (D) of each FET capacitor (M ; M′ ) are coupled to one another. The filter acting as an impedance transformer is a passive low power consuming and tunable filter, such as for a radio frequency (RF) receiver. It occupies only a very small area, while integrated on chip.