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:
Feb. 02, 2010
Filed:
Feb. 26, 2008
Applicant:
Ivan Koudar, Belohorska, CZ;
Inventor:
Ivan Koudar, Belohorska, CZ;
Assignee:
Semiconductor Components Industries, LLC, Oudenaarde, BE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 1/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
An echo detection circuit that detects an echo by detecting the magnitude of a digitally mixed representation of the received acoustic signal and reference sine and cosine signals. That magnitude is then compared against an echo threshold to verify the presence or absence of an echo signal. A low pass filter with a configurable cut-off frequency may be used to define the selectivity of the echo detector.