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:
Oct. 06, 1987
Filed:
Sep. 05, 1985
Gabriele Merli, Milan, IT;
Termano Testi, Milan, IT;
GTE Telecommunicazioni S.p.A., Milan, IT;
Abstract
A predistorter for use in transmission systems which employ power amplifiers, employing traveling wave tubes or field effect transistors. Since these active components present a nonlinear characteristic, which introduce amplitude and phase distortion in the amplified signal, the distorter circuit operates to subtract the distortion products from the output signal. In the present arrangement, the subtraction takes place before amplifying the signal by means of generation of distortion products which will present the same amplitude and opposite phase of those that will be generated by the power amplifier in order to obtain an undistorted and amplified signal.