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:
Aug. 04, 2009
Filed:
Jan. 13, 2005
Eric LI, Milpitas, CA (US);
Eric Li, Milpitas, CA (US);
Silicon Core Technology, Inc., Milpitas, CA (US);
Abstract
A writing current circuit () supplies a controlled electrical current to a laser diode () for recording data swiftly onto a DVD (). A plurality of thermometer code registers () respectively store numerical values. A current control register () receives a numerical value from one of the thermometer code registers (). Serial data specifies a sequence in which individual thermometer code registers () supply values to the current control register () thereby causing the writing current circuit () to supply a particular electrical current waveform to the laser diode (). A plurality of current sources () respectively receive a single output signal from the current control register () which activates or deactivates individual current sources () for supplying a particular quantity of current to the laser diode ().