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:
Nov. 02, 1999
Filed:
Dec. 30, 1997
Frank Gasparik, Monument, CO (US);
LSI Logic Corporation, Milpitas, CA (US);
Abstract
Method and apparatus for transferring data on a voltage biased data line are disclosed. In one embodiment, there is provided a bus interface for controlling a differential bus having a differential data line that includes a first bus line and a second bus line. The bus interface includes a bus controller circuit, an impedance network, and a controllable biasing circuit. The bus controller circuit is coupled to the differential bus and is configured to (i) control transfer of data across the differential bus, and (ii) generate a biasing control signal prior to data transfer on the differential data line. The impedance network is coupled to the first bus line and the second bus line and is configured to substantially match a characteristic impedance of the differential data line. The controllable biasing circuit is coupled to the differential data line and is configured to (i) develop a differential biasing voltage between the first bus line and the second bus line, and (ii) to remove the differential biasing voltage from the differential data line in response to the biasing control signal.