Look ahead flag for FIFO

Details Look ahead flag for FIFO Look ahead flag for FIFO

1995-01-24

1996-09-17

Nelms, David C.

Static information storage and retrieval

Read/write circuit

Serial read/write

365236, 365239, 36518902, 36518907, G11C 700

Patent

active

055575757

ABSTRACT:
The invention provides fast generation of flag signals for devices such as a first-in first-out buffers by looking ahead and predetermining flag signals for future possible states of the device. Predetermining flag signals does not delay flag output because the required calculations are completed before the flag signal is needed. The flag signal can be changed when needed as quickly as a multiplexer can switch from an old flag signal to a predetermined flag signal. The switching time of a multiplexer is shorter than the comparator delays in prior art flag generators.

REFERENCES:
patent: 4888741 (1989-12-01), Malinowski
patent: 5084841 (1992-01-01), Williams et al.
patent: 5121346 (1992-06-01), McClure
patent: 5206817 (1993-04-01), McClure
patent: 5214607 (1993-05-01), Duzan
patent: 5267191 (1993-11-01), Simpson
patent: 5388074 (1995-02-01), Buckenmaier

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