AN X x Y BIT ARRAY MULTIPLIER/ACCUMULATOR CIRCUIT

AN X x Y BIT ARRAY MULTIPLIER/ACCUMULATOR CIRCUIT

An XxY bit array multiplier/accumulator circuit is provided for adding an input number having (X+Y) bits to an (X+Y) bit product of an X bit number and a Y bit number, where X and Y are integers. Modified Booth's algorithm is implemented with an array structure which maintains a regular and sys...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: KLOKER, KEVIN L, SIZZLERAK, RONALD H
Format: Patent
Sprache:eng ; kor
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Beschreibung
Zusammenfassung:An XxY bit array multiplier/accumulator circuit is provided for adding an input number having (X+Y) bits to an (X+Y) bit product of an X bit number and a Y bit number, where X and Y are integers. Modified Booth's algorithm is implemented with an array structure which maintains a regular and systematic structure. The array structure uses adders and multiplexers in a predetermined column and row arrangement. Propagation delay is minimized while utilizing the modified Booth's algorithm by using a sum skipping technique and by using inverting logic properties of adders. Sign bit extension is provided by additional logic circuitry and signed/unsigned modes of operation are provided.