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:
Sep. 10, 2013
Filed:
Mar. 01, 2011
Andreas Johannes Köllmann, Rosengarten, DE;
Steffen Rode, Lüneburg, DE;
Andreas Johannes Köllmann, Rosengarten, DE;
Steffen Rode, Lüneburg, DE;
NXP B.V., Eindhoven, NL;
Abstract
Level-shifting devices and methods allow signals to be passed between input/output (I/O) ports. One such device comprises a first output driver that drives a first I/O port in response to a first control signal. A second output driver drives a second I/O port in response to a second control signal. A first comparator circuit, responsive to a first reference voltage and a voltage at the first I/O port, generates the second control signal. A limiter circuit limits driving of the second I/O port, by the second driver, to a limiting voltage that responsive to a the second I/O port over a first range of signaling voltages, and constrained to a set value over a second range. A voltage reference generating circuit generates a second reference voltage. A second comparator circuit generates the first control signal in response to the second reference voltage and the second I/O port.