Automatic alternator for priority circuit

Details Automatic alternator for priority circuit Automatic alternator for priority circuit

1977-04-01

1978-10-17

Nusbaum, Mark E.

Boots, shoes, and leggings

364900, G06F 918

Patent

active

041212851

ABSTRACT:
An automatic alternator for a priority circuit comprises one or more flip-flop circuits connected to the channels of the priority circuit by a plurality of AND gate means which are responsive to outputs of the flip-flop circuits and of the priority circuit channels to alternate the servicing of successive simultaneous signals at two or more requesting ports. The flip-flop circuit input is connected to the requesting ports through an AND gate and changes its operating state in response to the presence of two simultaneous signals at the requesting ports and to a cyclically occurring clock input to the flip-flop circuit. When the operating state of the flip-flop circuit is changed to the alternating mode, the signal at the requesting port served by the priority circuit channel during the preceding cycle is blocked from that channel and another request signal appearing simultaneously at the remaining port or ports is applied to the other channel or channels. For a priority circuit having three or more channels, the automatic alternator circuit permits random or "free race" alternating servicing of simultaneous requests or alternatively may provide servicing of those requests in a predetermined sequence in the manner of a commutator.

REFERENCES:
patent: 3573856 (1969-06-01), Best et al.
patent: 3949371 (1976-04-01), Pederzini
patent: 4009470 (1977-02-01), Danilenko et al.

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