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:
May. 12, 2009
Filed:
Jun. 30, 2005
Jelle Nico Wolthek, Nijmegen, NL;
Cornelis Klaas Waardenburg, Zeeland, NL;
Cecilius Gerardus Kwakernaat, Malden, NL;
Stefan Gerhard Erich Butselaar, Wijchen, NL;
Jelle Nico Wolthek, Nijmegen, NL;
Cornelis Klaas Waardenburg, Zeeland, NL;
Cecilius Gerardus Kwakernaat, Malden, NL;
Stefan Gerhard Erich Butselaar, Wijchen, NL;
NXP B.V., Eindhoven, NL;
Abstract
The invention relates to a receiver for a differential bus with a switch control logic (), with two branches with resistive elements (and) and with switches () for switching the resistive elements, in which the switch control logic sets the switches—in a first routine for determining the absolute level of signals on the bus by applying a common mode voltage to the bus, by comparing the voltage on a first resistive branch with a reference voltage, by selecting the correct switch settings, and by writing these settings to an internal storage device,—and in a second routine for minimizing the mismatch between the two resistive branches by applying a common mode voltage to the bus, by comparing the voltage of the second resistive branch with that of the already trimmed first resistive branch, by selecting the correct switch settings for the second branch, and by writing these settings to an internal storage device. The receiver therefore provides good balancing and common mode rejection.