Compact expandable folded first-in-first-out queue

Details Compact expandable folded first-in-first-out queue Compact expandable folded first-in-first-out queue

1990-04-27

1991-07-30

Bowler, Alyssa H.

Static information storage and retrieval

Recirculation stores

365 78, 36518912, 365221, G11C 700, G11C 1900, G11C 1928

Patent

active

050364898

ABSTRACT:
An expandable first-in-first-out FIFO circuit is provided for storing data words in a plurality of data cells in response to a digital position control signal generated by a plurality of control cells such that the oldest data word is always present at the output data bus. The data cells are arranged in pairs for data transferring therebetween whereby the data words are placed in the upper and lower data cells of each pair before allocating data cells farther from the input data bus. The digital position control signal is represented as a first portion having a first logic state and a second portion having a second logic state, the boundary of which determines the occupied portion of the data cells which provides control of the movement of data words therein. The FIFO circuit is expandable without modification of the preexisting data cells or control cells simply by adding data cell pairs and associated control cells.

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