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:
Mar. 25, 2003
Filed:
Aug. 11, 2000
Daniel Amrany, Ocean Township, NJ (US);
Frank Ashley, South Plainfield, NJ (US);
Frode Larsen, Tinton Falls, NJ (US);
Arnold Muralt, Fair Haven, NJ (US);
Globespanvirata, Inc., Red Bank, NJ (US);
Abstract
An improved line driver and method for increasing the available signal transmit power on a transmission line are disclosed. The improved line driver achieves an available transmit power increase by limiting the output stage signal path to NMOS and NPN bipolar semiconductor devices. The output stage of the improved line driver may comprise a first amplifier, a second amplifier, a first transformer, a second transformer, and a plurality of back-matching resistor networks. A second embodiment of an improved output stage of a line driver may comprise a first amplifier, a second amplifier, a transformer, and a plurality of back-matching resistor networks. Both preferred embodiments may be implemented with CMOS and bipolar semiconductor devices, as well as, a combination of the two semiconductor technologies. In its broadest terms, the method for increasing the available signal transmit power on a transmission line can be described as: applying a transmit signal to an input stage of an integrated line driver; amplifying the transmit signal in the output stage of a line driver using amplifier components selected from the group consisting of NMOS and NPN bipolar semiconductor devices in the output stage signal path; and applying the amplified transmit signal via a plurality of resistor networks to the transmission line.