By Topic

An Improved Adaptive Electronic Circulator for Telephone Applications

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Gazioglu, H. ; Univ. of Hull, England ; Homer, D. ; Sewell, J.I.

A previous attempt at realizing an adaptive circulator for telephone applications suffered from limitations due to voice switching problems, resistive part matching only, and some difficulties with adaptive operation for broadband signals. The use of pilot tones enables the circuit to be free from voice switching problems and to accomplish a close impedance match with that of a telephone line. Analysis of the circuit in an adaptive hybrid configuration produces the theoretical bounds on performance. Experimental results display the performance characteristics of the adaptive circuits and various other hybrid circuits on a selection of subscriber lines with a range of terminations.

Published in:

Communications, IEEE Transactions on  (Volume:27 ,  Issue: 8 )