| US 7,573,839 B2 | ||
| Line driver for an adaptive hybrid circuit | ||
| Tom Kwan, Cupertino, Calif. (US); and Sumant Ranganathan, Sunnyvale, Calif. (US) | ||
| Assigned to Broadcom Corporation, Irvine, Calif. (US) | ||
| Filed on Dec. 03, 2004, as Appl. No. 11/2,430. | ||
| Claims priority of provisional application 60/585584, filed on Jul. 07, 2004. | ||
| Prior Publication US 2006/0023647 A1, Feb. 02, 2006 | ||
| Int. Cl. H04B 3/23 (2006.01) | ||
| U.S. Cl. 370—286 [330/286; 333/117; 333/124; 370/252; 375/257; 379/391; 379/399.01; 379/406.1; 379/412; 455/101] | 27 Claims |
| 23. A method of extracting a received signal from a line signal carrying both a line received signal and a line transmission
signal, the method comprising:
substantially canceling a primary transmission signal from the line signal to produce a received signal;
inputting a secondary transmission signal of a line driver to substantially cancel a residual transmission signal from the
received signal;
measuring a residual transmission echo in the received signal;
varying the secondary transmission signal of the line driver so as to minimize the residual transmission echo; and
outputting the received signal.
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