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:
Mar. 20, 2001
Filed:
Jun. 25, 1999
Rezin E. Pidgeon, Jr., Atlanta, GA (US);
Scientific-Atlanta, Inc., Lawrenceville, GA (US);
Abstract
An embodiment includes an input node, a shunt impedance electrically connected to the input node, and at least one shunt diode connected in series with the shunt impedance. The input node receives an electrical signal from a signal generator. A bias current is applied to the shunt diode from a bias supply. In response, the shunt diode generates second-order distortion and substantially no third-order distortion. The level of bias current is adjusted to substantially eliminate any third-order distortion while the shunt impedance is adjusted so that the appropriate amount of second-order distortion is generated as predistortion. The predistortion is then provided to a nonlinear device, such as a laser, where it operates to substantially cancel inherent distortion generated by the nonlinear device.