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:
Nov. 01, 1994
Filed:
Dec. 09, 1991
Rezin E Pidgeon, Atlanta, GA (US);
Scientific-Atlanta, Inc., Norcross, GA (US);
Abstract
A predistortion circuit for an optical communications system includes a main path and a predistortion path for an RF modulating signal which are independently level adjusted and impedance matched to a laser diode. The distortion path includes a distortion generator which generates a distortion signal which is substantially the same as the distortion generated by the modulation of the transmission system. The distortion path further includes an in phase adjustment leg for overall amplitude adjustment and amplitude adjustment as a function of frequency and a quadrature adjustment leg for phase adjustment as a function of frequency. Temperature compensation is provided to the adjustment networks to stabilize the gain elements of each for ambient temperature changes.