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:
Mar. 03, 2009
Filed:
Jun. 25, 2007
Tze-chien Wang, Hsinchu, TW;
Tze-Chien Wang, Hsinchu, TW;
Realtek Semiconductor Corp., Hsinchu, TW;
Abstract
A switching audio power amplifier and a method for pop noise suppression. The switching audio power amplifier includes a pulse width modulation (PWM) signal generator for generating a PWM signal; a counter for generating counting values k˜kin N time intervals according to the PWM signal; N switch transistors connected in parallel and controlled by the counting values k˜kto turn on and off; and an impedance switching unit, which has a gate for receiving a switching audio signal and one terminal coupled to the switch transistors, and outputs a signal from the terminal. Because the N switch transistors are turned on or off one by one at different timings, the switching audio power amplifier of the invention can effectively suppress the pop noise.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile