Communications: electrical – Digital comparator systems
Patent
1974-08-30
1976-05-18
Morrison, Malcolm A.
Communications: electrical
Digital comparator systems
179 15AL, H04J 300
Patent
active
039582264
ABSTRACT:
In a data communication system in which data communication is carried out between two or more data processing units and at least one device to be controlled thereby, each coupled via data station to a common data transmission path connected in a loop fashion, a conflict preventing circuit is provided between said device to be controlled and the associated data station, which conflict preventing circuit comprises a flip-flop to be set in response to its own device identifying data received from a particular communicating unit for keeping its own device enabled, an address register for storing a unit identifying data of said communicating unit, and an AND gate responsive to the device identifying data input and a busy signal from its own device for latching said flip-flop and said address register while the device is busy or communicating with said particular unit, thereby preventing said flip-flop and said address register from being affected from a data transmitted from a different unit while the device is communicating with said unit and thus avoiding a problem of conflict.
REFERENCES:
patent: 3242467 (1966-03-01), Lamy
patent: 3445822 (1969-05-01), Driscoll
patent: 3496551 (1970-02-01), Driscoll et al.
patent: 3629854 (1971-12-01), Hauck et al.
patent: 3639904 (1972-02-01), Arulpragasam
patent: 3680053 (1972-07-01), Cotton et al.
patent: 3699529 (1972-10-01), Beyers et al.
patent: 3735365 (1973-05-01), Nakamura et al.
patent: 3755786 (1973-08-01), Dixon et al.
patent: 3755789 (1973-08-01), Collins
patent: 3761879 (1973-09-01), Brandsma et al.
Hirai Saburo
Kuroda Takeshi
Nakao Hidekuni
Sazanami Yujiro
Fasse Wolfgang G.
Krass Errol A.
Morrison Malcolm A.
Nippon Mining Co., Ltd.
Omron Tateisi Electronics Co.
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