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:
Dec. 23, 2003
Filed:
Apr. 19, 2002
Cheh-Ming Jeff Liu, Thousand Oaks, CA (US);
Neng-Haung Sheng, Thousand Oaks, CA (US);
Euvis, Inc., Westlake Village, CA (US);
Abstract
A laser diode driver circuit is disclosed that uses a cascode output stage having high-impedance load and a matching network for reducing mismatch interference. Due to the high-impedance load, on-chip dummy current is less than that required for laser diode drivers with matched loads. Accordingly, the number of transistors of said output stage can be reduced. Moreover, with an AC-coupled active load circuit replacing the matched resistance of the matching network, the power efficiency is improved. A laser diode driver circuit, in accordance with the present invention, can be applied to an optical transmitter with low power requirement.