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. 25, 2003
Filed:
Dec. 21, 2000
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
When a PWM signal is generated by PWM generators which are provided for the number of channels, each PWM generator outputs the PWM start schedule data showing the timing of startup of the PWM signal to the CPU. When the number of PWM signals which start at substantially the same time exceeds a predetermined number on the basis of the PWM start schedule data, the CPU outputs delay setting data with respect to a channel corresponding to a portion exceeding the predetermined number to the PWM generator as the one showing that the generation of the PWM signal is to be delayed. The PWM generator delays the PWM signal, when the delay setting data shows a delay. As a result, a multi-channel pulse width modulation apparatus which can prevent a decrease in the operational reliability due to simultaneous start of the pulse width modulation signals can be provided.