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:
Apr. 22, 2008
Filed:
Aug. 22, 2002
Applicant:
Jens Wildhagen, Weinstadt, DE;
Inventor:
Jens Wildhagen, Weinstadt, DE;
Assignee:
Sony Deutschland GmbH, Cologne, DE;
Primary Examiner:
Int. Cl.
CPC ...
H03G 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A compander for noise reduction of a FM signal is described, wherein a group delay (τ) linked to the generation of the compressor gain (c(t)) is equalised during generation of the multiplex signal (m(t)), and a group delay (τ) linked to the generation of the expander gain (c(t)) is equalised during generation of the sum signal (u(t)) and the expanded difference signal (u(t)). Alternatively or additionally the compressor gain and/or the expander gain is controlled by an auxiliary signal on the basis of a combination of sum signal and difference signal of the FM signal. Such companders avoid overmodulation in the transmitter.