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. 04, 2014
Filed:
Oct. 15, 2008
Akira Kitayama, Hachioji, JP;
Tatemi Ido, Kodaira, JP;
Nobuaki Sato, Yokohama, JP;
Hiroharu Sakai, Tokyo, JP;
Kouichi Ihara, Yokohama, JP;
Akira Kitayama, Hachioji, JP;
Tatemi Ido, Kodaira, JP;
Nobuaki Sato, Yokohama, JP;
Hiroharu Sakai, Tokyo, JP;
Kouichi Ihara, Yokohama, JP;
Hitachi-Lg Data Storage, Inc., Tokyo, JP;
Abstract
There is provided an optical disc drive comprises an optical pick-up including a laser diode (LD) and a laser diode driver (LDD) for driving the laser diode, a digital signal processor (DSP) including a write strategy circuit and low voltage differential signaling (LVDS) drivers for transmitting a produced write strategy signal, a circuit board having the DSP mounted thereon and including a line for transmitting the write strategy signal, a transmission line connecting the circuit board and the LDD and transmitting a write strategy signal, and differential resistors connected between differential lines of outputs of the LVDS drivers. Especially, a resistor having a resistance value in a range of 80 to 500Ω is inserted between the differential lines of outputs of the LVDS driver inside the DSP.