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. 22, 2016
Filed:
Jan. 23, 2015
Euhan Chong, Ottawa, CA;
Euhan Chong, Ottawa, CA;
Huawei Technologies Co., Ltd., Shenzhen, CN;
Abstract
Methods and apparatus for mitigating baseline wander in an AC coupled transmission line are provided. An apparatus includes an input node, an output node, a sampling circuit and a level-shifting output circuit. The input and output nodes couple the apparatus in parallel with a high-pass filter of the transmission line. The sampling circuit samples an input voltage at the input node. The level-shifting output circuit delivers a level-shifted version of the input voltage to the output node. The apparatus may include a first pair of synchronized switches, a second pair of synchronized switches, and a sampling capacitor therebetween. The switches are driven periodically with concurrent closure of the two pairs of switches inhibited. The sampling capacitor couples between a signal input and a reference node upon closure of the first pair of switches, and between a bias voltage and a signal output upon closure of the second pair of switches.