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:
Nov. 29, 2005
Filed:
Jun. 08, 2001
Ara Bicakci, San Jose, CA (US);
Cormac S. Conroy, Sunnyvale, CA (US);
Ara Bicakci, San Jose, CA (US);
Cormac S. Conroy, Sunnyvale, CA (US);
LSI Logic Corporation, Milpitas, CA (US);
Abstract
A line driver couples a data transceiver to a transmission line having a load impedance Z via a transformer with a turns ratio of 1:n, the data transceiver transmitting signals in a first frequency range and receiving signals in a second frequency range different from the first frequency range. The line driver includes an input port for receiving an input signal voltage, an output port for supplying an output signal voltage to the transformer, and a differential amplifier having a low pass filter for amplifying the input signal voltage and outputting an amplified signal voltage. The line driver further includes termination resistors having a resistance R, whereand a positive feedback path for coupling the output signal voltage from the output port to an appropriate node of the differential amplifier so that a synthesized output impedance substantially matches the load impedance Z over the second frequency range.