Priority encoder

Details Priority encoder Priority encoder

1994-08-30

1996-10-22

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

34082551, 395732, 395860, 3642301, 3642426, G06F 1300

Patent

active

055684858

ABSTRACT:
A circular priority encoder includes a linear priority encoder that receives a plurality of requests of ranks 1 to n on corresponding request lines. The encoder acknowledges on an acknowledgement output the request of the lowest rank among the requests it receives; a mask register is connected to transmit to the linear encoder only the requests whose ranks are determined to be active by the ranks of active bits of a mask contained in the mask register. A mask generator provides the mask register with a mask in which bits of ranks 1 to i (i=1, 2 . . . n) are inactive and the remaining bits are active when a request of rank i is acknowledged by the linear encoder.

REFERENCES:
patent: 5039986 (1991-08-01), Gergiou
patent: 5083258 (1992-01-01), Yamasaki
patent: 5083261 (1992-01-01), Wikie
patent: 5095460 (1992-03-01), Rodeheffer
patent: 5160923 (1992-11-01), Sugawara et al.
patent: 5257383 (1993-10-01), Lamb
patent: 5265215 (1993-11-01), Fukuda et al.
patent: 5265258 (1993-11-01), Fiene et al.
patent: 5321640 (1994-06-01), Anderson et al.
IBM Technical Disclosure Bulletin, vol. 29, No. 3, Aug., 1986 Armonk, NY, US pp. 1361-1362.

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