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. 17, 2002
Filed:
Mar. 30, 1999
Mark A. Kovalan, Cedar Rapids, IA (US);
Bryon L. Wiscons, Marion, IA (US);
John L. Persick, Robins, IA (US);
Douglas R. Johnson, Cedar Rapids, IA (US);
Gregory E. Dunn, Marion, IA (US);
Stephen I. Kotalik, RR Midway, IA (US);
Rockwell Collins, Inc., Cedar Rapids, IA (US);
Abstract
A bus system including a bus user apparatus and a method for communicating via the bus system are disclosed. The bus user apparatus includes means for means for selectively coupling a transmitter to the transmission line according to a protocol of the bus system. The bus system provides bi-directional communication over a single transmission line. The transmitter of the transmitting device is coupled to the transmission line during transmission. Upon completion of transmission, the transmitting device sends a permission to transmit signal to the next transmitting device according to the protocol, and decouples its transmitter from the transmission line. The next transmitting device couples its transmitter to the transmission line and begins transmission of data. Multiple bus users, both transmitters and receivers, are accommodated by the bus system, and bi-directional communication is supported. Further, the data transmission rate may be increased by selectively coupling the transmitter of a receiving device to the transmission line to provide a termination impedance on the transmission line. Higher transmission rates may be accommodated without a termination impedance; if necessary, a termination impedance may be applied. If necessary, the output voltage of the transmitter and the sensitivity of the receiver may be adjusted to accommodate the higher transmission rates. The bus system may also accommodate larger sized words. The bus system is compatible with previously existing systems compliant with an ARINC standard while providing increased capability.