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:
Aug. 09, 2016
Filed:
Jun. 25, 2014
Applicant:
Neofidelity, Inc., Seoul, KR;
Inventor:
Yeongha Choi, Seoul, KR;
Assignee:
NEOFIDELITY, INC., Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 3/04 (2006.01); H03F 3/183 (2006.01); H03F 3/217 (2006.01); H04R 3/00 (2006.01); H03G 9/00 (2006.01); H03G 9/02 (2006.01);
U.S. Cl.
CPC ...
H04R 3/04 (2013.01); H03F 3/183 (2013.01); H03F 3/217 (2013.01); H03G 9/005 (2013.01); H03G 9/02 (2013.01); H04R 3/002 (2013.01); H03F 2200/03 (2013.01); H03F 2200/171 (2013.01); H04R 3/007 (2013.01);
Abstract
An amplifier and an amplification method are provided. In accordance with the present invention, a cut-off frequency of variable high-pass filter is dynamically adjusted in real time according to a low frequency level of an input audio signal to prevent a distortion of the audio signal and damage of loudspeaker.