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:
Oct. 27, 2009
Filed:
Jul. 06, 2004
Robert H. Leonowich, Fleetwood, PA (US);
Xiaohong Quan, Macungie, PA (US);
Robert H. Leonowich, Fleetwood, PA (US);
Xiaohong Quan, Macungie, PA (US);
Agere Systems, Inc., Allentown, PA (US);
Abstract
A line driver circuit with an output impedance that is set to a value which is based at least in part on the impedance of one or more current sources of the driver circuit. The current source impedance varies depending on the desired output amplitude of the driver circuit. Once the current source impedance is determined, a resistor is selected to be placed in parallel connection with the current source so that the combination of the resistor and the current source impedance will produce a desired output impedance for the driver circuit. Preferably, the driver circuit includes a second current source and second resistor in parallel with each other and a source termination resistor, such that the combination of the current source impedance values and the resistor values produces a desired output impedance for the driver circuit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile