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:
Jun. 10, 2003
Atsushi Mitamura, Hanno, JP;
Shindengen Electric Manufacturing Co., Ltd., Tokyo, JP;
Abstract
To provide a new switching amplifier in which power supply switching noise is reduced to improve the quality. The switching amplifier is provided with a power amplifier ( ) that has a modulator which modulates an analog signal or a multi bit digital signal into a two-level signal, and supplies an output pulse signal from this modulator to a power switching element ( ); and a &Dgr;&Sgr; power supply ( ) which is provided with a &Dgr;&Sgr; modulating device, and the construction is such that the output pulse signal from the modulator of the power amplifier ( ) is supplied to the &Dgr;&Sgr; power supply ( ), and also the construction is such that the &Dgr;&Sgr; power supply ( ) receives the pulse signal as an operating clock, &Dgr;&Sgr; modulates the received pulse signal, and supplies the &Dgr;&Sgr; modulated pulse signal to the power switching element ( ).