Inventors:
Cormac S. Conroy - Sunnyvale CA, US
Samuel W. Sheng - San Jose CA, US
Ara Bicakci - San Jose CA, US
John DeCelles - Campbell CA, US
Sang-Soo Lee - Cupertino CA, US
Assignee:
LSI Logic Corporation - Milpitas CA
International Classification:
H04M001/00
US Classification:
37939901, 379391, 379392, 379402
Abstract:
A line interface couples signals between a data transceiver and a transmission line having a load impedance Z. The line interface includes a transformer, a driver circuit for supplying a transmit signal from the data transceiver to the transformer, and a receiver circuit for receiving a receive signal from the transformer. The transformer includes a first port coupled to the transmission line, a second port coupled to the driver circuit, a third port coupled to the receiver circuit, a first winding part having a turns ratio of 1: n, where n>1, for coupling the transmit signal from the second port to the first port, and a second winding part having a turns ratio of 1: m, where m