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:
Apr. 26, 1994
Filed:
Jul. 17, 1992
Eugeniusz A Woloszczuk, San Jose, CA (US);
Maxoptix Corporation, San Jose, CA (US);
Abstract
An optical recording system having a laser for generating a light beam to write data to and read data from a storage medium, an RF modulator for modulating the laser to improve its stability, and an apparatus for driving the laser. The apparatus is comprised of a transistor coupled to the laser for supplying current to the laser. An amplifier is implemented to drive the base of the transistor according to a microprocessor. Thereby, the microprocessor effectively controls the power level of the laser. The transistor and the RF modulator are enclosed within shielding to contain the RF energy being generated by the modulator. In addition, the collector-base separation of the transistor reduces the RF energy being transmitted through the line driving the base of the transistor.