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:
Dec. 14, 2004
Filed:
May. 08, 2003
Takashi Shima, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A reduction is made in signal distortion that occurs in an output signal of a PWM switching power amplifier due to noise disturbances from a switching power supply. In a switching power amplifier that has a switching power supply unit, a clock signal for controlling the switching of the switching power supply unit is generated based on a clock signal that is used to synchronize switching operations. The clock signal has a clock period that is an integer multiple of a period t of the clock signal and matches a timing at which a signal level of a PWM power signal that is generated by the switching power amplifier is at ground level. The switching of the switching power supply unit is synchronized using the clock signal.