Communications: electrical – Digital comparator systems
Patent
1974-09-10
1977-04-05
Pitts, Harold I.
Communications: electrical
Digital comparator systems
340147R, H04Q 900
Patent
active
040165396
ABSTRACT:
An asynchronous arbiter for use in systems where two or more signal sources attempt to simultaneously use a resource operates to insure that signal source requests are honored in the sequence of the earliest generated request to the latest generated request. The arbiter preserves the order of requests while the respective request signals are kept waiting, and an acknowledgement signal for use of the resource is given in succession to the respective signal sources starting from the signal source with the earliest request to successively service the requests of the signal sources. The arbiter is implemented with a competition decision circuit receiving as inputs a plurality of request signals from respective signal sources and providing an output to a control circuit designating the signal source to be serviced. The control circuit also receives an acknowledgement input from the resource indicating that a request is acceptable, and from these inputs generates a request signal to the resource and an acknowledgement signal to the signal processors in order of priority.
REFERENCES:
patent: 3300758 (1967-01-01), Hawley
patent: 3639904 (1972-02-01), Arulpragasam
patent: 3665398 (1972-05-01), Kawai
Nippon Electric Company Ltd.
Pitts Harold I.
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