Message FIFO buffer controller

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4873666
SERIAL NO

07108655

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Abstract

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A FIFO (first in first out) control circuit for providing address information to a FIFO memory uses two up counters--one to provide the write address and one to provide the read address. A multiplexer selects which addresses (read or write) are used. Two storage registers are used to temporarily 'hold' the output from the counters. This enables the counters to be re-loaded with their original 'count' to enable either a re-reading or a re-writing of a message stored in the FIFO memory. Comparators and logic circuitry are used to provide two status output signals, namely full (or not) and empty (or not).

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Patent Owner(s)

Patent OwnerAddress
NORTEL NETWORKS LIMITEDWORLD TRADE CENTER OF MONTREAL 380 ST ANTOINE STREET WEST 8TH FLOOR MONTREAL QUEBEC H2Y 3

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ciancibello, Carmine A Nepean, CA 3 90
Geadah, Youssef A Nepean, CA 3 102
Lefebvre, Martin C Ottawa, CA 5 118

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