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:
May. 21, 2013
Filed:
Jan. 13, 2011
Applicants:
Hsin-chieh Huang, Taichung, TW;
Yi-lung Chen, Keelung, TW;
Inventors:
Hsin-Chieh Huang, Taichung, TW;
Yi-Lung Chen, Keelung, TW;
Assignee:
ISSC Technologies Corp., Hsinchu, TW;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 15/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention discloses a circuit with three-stage of power-on sequence used for suppressing the pop noise in audio system. It mainly comprises a first resistor (R); a capacitor (C); a first switch (SW); a second switch (SW); a soft start device; a first feedback amplifier; and a second feedback amplifier. By using the three-stage of power-on sequence, the present invention can effectively suppress the pop noise when the audio driver is power on.