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.

Date of Patent:
Sep. 21, 2010

Filed:

Jan. 27, 2005
Applicants:

Karl Stefan Barkarö, Åkersberga, SE;

BO Bokinge, Bromma, SE;

Jörg Hauptmann, Wernberg, AT;

Karl-mikael Johanson, Stockholm, SE;

Lars Karlsson, Taby, SE;

Torbjörn Ivar Randahl, Nacka, SE;

Inventors:

Karl Stefan Barkarö, Åkersberga, SE;

Bo Bokinge, Bromma, SE;

Jörg Hauptmann, Wernberg, AT;

Karl-Mikael Johanson, Stockholm, SE;

Lars Karlsson, Taby, SE;

Torbjörn Ivar Randahl, Nacka, SE;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M 1/00 (2006.01); H04M 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

at least one self oscillating loop circuit which oscillates with a switching frequency (f), wherein the self oscillating loop circuit () comprises an output driver () which is switched with said switching frequency and a loop filter () which feeds back an amplified loop signal output by said driver () to an input of said self oscillating loop and a trimming circuit () for trimming the switching frequency (fs) of said self oscillating loop circuit.


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