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:
May. 23, 2006
Filed:
Jan. 23, 2003
Hironobu Tanase, Kanagawa, JP;
Hironobu Tanase, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A semiconductor laser drive circuit of the present invention reduces the number of wires, solves the out-of-timing problem of pulses due to differences in wire length, and emit short light pulses at a high transfer rate. A common emitter circuit () converts a voltage signal (J) input at an input port () into a current signal and, when reading information, adds the current signal to a signal output from a high-frequency oscillator circuit (). High frequency components of the current signal converted from the voltage signal (J) within a bandwidth of a transistor (Q) are boosted. Degradation of the output signal of the high-frequency oscillator circuit () is kept at a minimum by a common base circuit including the transistor (Q). A current switch circuit () cuts off or lets through the output current of a current mirror circuit ().
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile