Transition signaling circuit and arbitrator using this circuit

Details Transition signaling circuit and arbitrator using this circuit Transition signaling circuit and arbitrator using this circuit

2005-07-26

2005-07-26

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C326S093000, C326S098000, C365S194000, C713S600000

Reexamination Certificate

active

06922090

ABSTRACT:
The present invention implements an asynchronous transition signaling circuit which can be applied to a bus arbitrator or the like. The OR gate holds a token (feedback signal S) as long as the device enabling signal Grant is output, even after the request event ReqIn is canceled, and as a result, the Muller C element with an inverter cancels the output of the response event AckOut. When the device request signal Req is not output, the feedback signal S passes through the AND gate, and the request event ReqOut is output from the AND gate. At the same time, the device enabling signal Grant is no longer output, and the loop comprised of the Muller C element with an inverter, the OR gate and the AND gate is canceled. As a result, the token (feedback signal S) is transferred to the next transition signaling circuit.

REFERENCES:
patent: 5646554 (1997-07-01), Kim et al.
patent: 5758139 (1998-05-01), Sutherland et al.
patent: 5918042 (1999-06-01), Furber
patent: 6023430 (2000-02-01), Izumikawa
patent: 6486700 (2002-11-01), Fairbanks et al.
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(Ivan E. Sutherland: Micro-pipelines, CACM, vol. 32, No. 6, pp. 720-378) (disclosed on p. 1 of the specifiation as Document 1)Magazine “bit”, vol. 22, No. 3, published by Kyoritsu Publishing, pp. 246-268; Paper from Commemorative Lecture on Winning 1998 ACM Turing Prize.

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