TREA

Hybrid frequency compensation network

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Information

  • Patent Application
  • 20090232033
  • Publication Number
    20090232033
  • Date Filed
    September 24, 2008
    16 years ago
  • Date Published
    September 17, 2009
    15 years ago
Information
Abstract
Hybrid frequency compensation is provided. Hybrid circuits are used to subtract the transmit signal from the receive signal in a full duplex communication system. Since the hybrid circuit and the main line driver are exposed to different loads, accurate subtraction is difficult to achieve. A frequency dependent network is used to match the loading seen by the driver and the hybrid. The compensation network can be based on active and/or passive components.
Description
FIELD OF THE INVENTION

The present invention relates generally to communication systems. More particularly, the present invention relates to hybrid frequency compensation network.







SUMMARY AND DETAILED DESCRIPTION

Details of various embodiments of the present invention are disclosed in the following appendix:


Appendix A: a 3-page document by the inventors.


As one of ordinary skill in the art will appreciate, various changes, substitutions, and alterations could be made or otherwise implemented without departing from the principles of the present invention. Accordingly, the examples and drawings disclosed herein including the appendix are for purposes of illustrating the preferred embodiments of the present invention and are not to be construed as limiting the invention.

Claims
  • 1. A full duplex communications system, comprising: (a) a driver for driving a first load;(b) a hybrid for subtracting a transmit signal from a receive signal; and(c) a frequency compensation network for matching the first load of said driver and a second load seen by said hybrid.
CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No. 12/012,826 filed Feb. 5, 2008. U.S. application Ser. No. 12/012826 filed Feb. 5, 2008 claims priority from U.S. provisional patent application No. 60/900,180 filed Feb. 7, 2007, which is incorporated herein by reference.

Provisional Applications (1)
Number Date Country
60900180 Feb 2007 US
Continuations (1)
Number Date Country
Parent 12012826 Feb 2008 US
Child 12284773 US