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. 26, 2019
Filed:
Apr. 30, 2017
Adtran, Inc., Huntsville, AL (US);
Daniel M. Joffe, Owens Crossroads, AL (US);
ADTRAN, Inc., Huntsville, AL (US);
Abstract
A driver circuit for a transmitter includes a main path in parallel with an error correction path used for feed-forward error correction. The main path has an amplifier for amplifying a data signal to be transmitted from the transceiver. In parallel with the amplifier is a feedforward error correction circuit that provides an error correction signal that compensates for distortion introduced by the amplifier when the error correction signal is combined with the amplifier's output. The error correction circuit is designed to have a high impedance output so that voltage swings in the data signal do not create a demand for significant current from the feedforward error correction circuit, thereby reducing the current of the error correction signal. As an example, it is possible for the current of the error correction signal to substantially match that which is required to cancel the amplifier distortion, thereby minimizing distortion of the signal.