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. 13, 2005
Filed:
Feb. 17, 2000
Tadao Inoue, Kawasaki, JP;
Tadashi Ikeuchi, Kawasaki, JP;
Hiroyuki Rokugawa, Kawasaki, JP;
Masaaki Kawai, Kawasaki, JP;
Norio Ueno, Kawasaki, JP;
Norio Murakami, Sapporo, JP;
Toru Matsuyama, Sapporo, JP;
Makoto Miki, Sapporo, JP;
Toshiyuki Takauji, Sapporo, JP;
Tadao Inoue, Kawasaki, JP;
Tadashi Ikeuchi, Kawasaki, JP;
Hiroyuki Rokugawa, Kawasaki, JP;
Masaaki Kawai, Kawasaki, JP;
Norio Ueno, Kawasaki, JP;
Norio Murakami, Sapporo, JP;
Toru Matsuyama, Sapporo, JP;
Makoto Miki, Sapporo, JP;
Toshiyuki Takauji, Sapporo, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
Using a switching signal from a coarse/fine switching and operation mode switching circuit, the width of change of a counter control value during power up is increased, and the width of change is reduced once a steady state is reached. In the steady state, the frequency of updating is limited by a control signal from an update permit control circuit. In the steady state, the frequency band of a current source in an LD driving circuit is reduced in width.