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. 18, 2004
Filed:
Oct. 24, 2000
Pierre André Laurent, Bessancourt, FR;
Thomson-CSF, Paris, FR;
Abstract
A process for neutralizing a tube of a high power digital radio broadcasting transmitter includes modulating two quadrature signals I(t), Q(t) at a transmission frequency (F ) by a modulator to control a grid of the tube which is configured to work at saturation with a gain V . A phase-modulated input signal E(t) output from the modulator is amplified by an amplifier which is configured to work at saturation with a gain V . The input signal E(t) is predistorted by digital means so as to compensate for an undesirable coupling between an anode and the grid of the tube of the transmitter so that an output of the transmitter corresponds to a desired output signal S(t). A corrector signal W(t) is calculated using the expression W(t)=jg(t)S(t).