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. 29, 2007
Filed:
Feb. 28, 2005
Kazuhiro Hida, Neyagawa, JP;
Joji Kasai, Neyagawa, JP;
Yoshitaka Handa, Sakai, JP;
Sou Fujioka, Neyagawa, JP;
Mamoru Sekiya, Neyagawa, JP;
Kazuhiro Hida, Neyagawa, JP;
Joji Kasai, Neyagawa, JP;
Yoshitaka Handa, Sakai, JP;
Sou Fujioka, Neyagawa, JP;
Mamoru Sekiya, Neyagawa, JP;
Onkyo Corporation, Neyagawa, JP;
Abstract
A switching amplifier including a PWM circuit, a driver, a switching output circuitand an LPFis provided with a fluctuation detection circuitfor detecting fluctuations in the power supply voltage. The fluctuation detection circuitincludes detection resistorsandconnected in series between a positive power supplyand a negative power supply. A fluctuating signal RPL occurring at a fluctuation detection terminalis supplied to the inverted input terminal of a differential amplifierof a non-inverted amplifier circuit. The non-inverted amplifier circuitinverts the fluctuating signal RPL, mixes the inverted fluctuating signal into the input signal e, amplifies the mixed signal, and supplying the amplified signal to the PWM circuit