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:
Jun. 15, 1999
Filed:
Mar. 25, 1997
Gregory Edward Beers, Austin, TX (US);
Richard Francis Frankeny, Elgin, TX (US);
Mithkal Moh'd Smadi, Round Rock, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A system and method for communicating information from a high speed digital device, such as a processor, to a high speed peripheral device over a bus which has a frequency capability materially lower than the clock rates of the respective sending and receiving devices. Multiple successive digital signals are latched, converted to analog format current source signals, transmitted over the bus in analog format, decoded into respective digital format signals at the receiving end of the bus, and sequentially provided to the peripheral device in the original order. Analog to digital and digital to analog conversion accuracy is maintained through the use of a linking current reference which defines at each end of the bus a reference signal suitable for mirrored replication. The current mirrors allow accurate integrated circuit device dimension controlled current generation and corresponding current level decoding.