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. 02, 2006
Filed:
Oct. 27, 1998
Gunnar Bahlenberg, Lulea, SE;
Daniel Bengtsson, Lulea, SE;
Siwert Hakansson, Jarfalla, SE;
Anders Isaksson, Lulea, SE;
Lars-ake Isaksson, Lulea, SE;
Mikael Isaksson, Lulea, SE;
Magnus Johansson, Lulea, SE;
Mauritz Lahti, Lulea, SE;
Lis-marie Ljunggren, Lulea, SE;
Hans Lundberg, Lulea, SE;
Tomas Nordstrom, Lulea, SE;
Lennart Olsson, Lulea, SE;
Sven-rune Olofsson, Lulea, SE;
Tomas Stefansson, Boden, SE;
Hans Oman, Lulea, SE;
Goran Okvist, Lulea, SE;
Per Odling, Arnäsvall, SE;
Petra Dentgen, Arnäsvall, SE;
Franck Sjöberg, Lulea, SE;
Gunnar Bahlenberg, Lulea, SE;
Daniel Bengtsson, Lulea, SE;
Siwert Hakansson, Jarfalla, SE;
Anders Isaksson, Lulea, SE;
Lars-Ake Isaksson, Lulea, SE;
Mikael Isaksson, Lulea, SE;
Magnus Johansson, Lulea, SE;
Mauritz Lahti, Lulea, SE;
Lis-Marie Ljunggren, Lulea, SE;
Hans Lundberg, Lulea, SE;
Tomas Nordstrom, Lulea, SE;
Lennart Olsson, Lulea, SE;
Sven-Rune Olofsson, Lulea, SE;
Tomas Stefansson, Boden, SE;
Hans Oman, Lulea, SE;
Goran Okvist, Lulea, SE;
Per Odling, Arnäsvall, SE;
Petra Dentgen, Arnäsvall, SE;
Franck Sjöberg, Lulea, SE;
STMicroelectronics N.V., Amsterdam, NL;
Abstract
The hybrid circuit can be used to substantially reduce near echo signals. The circuit includes a balanced 2-wire to 4-wire hybrid for interconnecting a two wire receive path and a two wire transmit path to a two wire transmission line. The two wire receive path connects the balanced hybrid to an A/D converter and the two wire transmit path connects a D/A converter to the balanced hybrid. The two wire receive path contains a filter, dimensioned to remove signals transmitted from the D/A converter. The invention is particularly adapted for use with FDD and OFDD.