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. 04, 2003
Filed:
Dec. 27, 2001
Herman Joris Casier, Kuurne, BE;
Joannes Mathilda Josephus Sevenhans, Brasschaat, BE;
Elvé Desiderius Jozef Moons, Lummen, BE;
Alcatel, Paris, FR;
Abstract
The present invention is related to a Line driver for amplifying an input signal, said line driver comprising: a first input terminal ( ) for receiving said input signal, a non-linear amplifier ( ) connected to said input terminal ( ) and arranged to provide a first output signal at a first output terminal ( ), a digital to analogue converter ( ) arranged to transform said input signal to an analogue input signal, an analogue linear amplifier ( ) comprising a second ( ) and a third input terminal ( ) and a second output terminal ( ), set up as a comparator between a first correction signal provided at said second input terminal ( ) and a second correction signal provided at said third input terminal ( ) and arranged to provide a second output signal at said second output terminal ( ), combining means arranged to combine said first output signal and said second output signal to provide a total output signal to an output line ( ), a first operational amplifier ( ) configured to sense the current of said total output signal and arranged to provide a third output signal at fourth output terminal ( ), said third output signal being based on said current and the impedance of the output line, and a second operational amplifier ( ) arranged to subtract said third output signal from said analogue input signal to provide a fourth output signal, wherein said first correction signal is the total output signal and the second correction signal is said fourth output signal.