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:
Nov. 30, 2004
Filed:
Feb. 21, 2001
Nobuaki Tsuji, Hamamatsu, JP;
Kunito Takahashi, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu, JP;
Abstract
A laser diode driving circuit is provided, which is capable of supplying a laser diode thereof with a high-speed pulse current. A current source supplies a current to the laser diode. An NMOS transistor as a first switch is connected between the current source and the laser diode. An NMOS transistor as a second switch is connected between a junction between the current source and the first switch and a pseudo load. A controller supplies a first voltage pulse signal to the first switch and a second voltage pulse signal opposite in phase to the first voltage pulse signal to the second switch to switch the first and second switches in a complementary manner.