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:
Jan. 11, 2005
Filed:
Sep. 25, 2003
Gerald Keith Bartley, Rochester, MN (US);
Richard Boyd Ericson, Rochester, MN (US);
Philip Raymond Germann, Rochester, MN (US);
Gerald Keith Bartley, Rochester, MN (US);
Richard Boyd Ericson, Rochester, MN (US);
Philip Raymond Germann, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
The present invention provides apparatus and methods to eliminate a required 'dead cycle' or 'living cycle' during transfer of control from a first source terminated driver to a second source terminated driver on a bidirectional signaling conductor. On a last bus cycle on which the first driver drives the signaling conductor, the first driver stops driving and goes into a high impedance state respondent to detection that the first driver current has become lower than a predetermined current or that a voltage at the output of the first driver has become within a predetermined voltage difference of a target voltage. The second driver, knowing that the first driver will be switched to a high impedance state, can assume control of the signaling wire and drive a signal on the signaling conductor shortly after receipt of the signal from the first driver.