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:
Oct. 29, 2013
Filed:
Aug. 22, 2008
Yoshinori Nakanishi, Neyagawa, JP;
Mamoru Sekiya, Neyagawa, JP;
Yoshinori Nakanishi, Neyagawa, JP;
Mamoru Sekiya, Neyagawa, JP;
Onkyo Corporation, Neyagawa-shi, JP;
Abstract
A pulse width modulation circuit of the present invention changes a voltage of a charging circuit based on an input signal voltage and in synchronization with a first switching signal; changes, during a predetermined second period following a first period during which the voltage of the charging unit is changed, the voltage of the charging unit in an opposite direction to a direction in which the voltage is changed during the first period, based on a constant bias current; detects time starting from when the second period starts to when the voltage of the charging unit reaches a predetermined reference voltage; and generates, based on the detected time which is repeatedly output each time the first switching signal is output, a pulse signal having a pulse width of the time.