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:
Aug. 09, 2005
Filed:
Nov. 24, 2003
Jianhong Ju, Gorham, ME (US);
Pravas Pradhan, South Portland, ME (US);
Jianhong Ju, Gorham, ME (US);
Pravas Pradhan, South Portland, ME (US);
Fairchild Semiconductor Corporation, South Portland, ME (US);
Abstract
A system and method are described for receiving differential currents in a current mode circuit. When conditions occur where the receiver inputs are floating, undriven, shorted together, or one or both shorted to ground, the output of the system remains stable. Diode connected MOS transistors receive the unequal currents, and current mirrors amplify the received currents. Those amplified mirrored currents are differentially amplified and converted into voltage signals suitable of typical computer and logic systems. The current mode differential nature of the invention provides high common mode current and voltage noise immunity. A threshold for the unequal currents helps provide high differential current and voltage noise immunity.