High speed and area-efficient multiply accumulate (MAC) unit for digital signal prossing applications

A. Abdelgawad, Magdy Bayoumi

Research output: Contribution to journalConference articlepeer-review

41 Scopus citations


A high speed and area-efficient merged Multiply Accumulate (MAC) Units is proposed in this work. To realize the area-efficient and high speed MAC unit proposed in this work, first we examine the critical delays and hardware complexities of conventional MAC architectures to derive at a unit with low critical delay and low hardware complexity. The new architecture is based on binary trees constructed using a modified 4:2 compressor circuits. Reducing the overall area is achieved by the full utilization of the compressors instead of putting zeros in free inputs. Increasing the speed of operation is achieved by avoid using the modified compressor in the critical path. Feeding the bits of the accumulated operand into the summation tree before the final adder helps to increase the speed too. The proposed MAC unit and the previous merged MAC unit are mapped on a Field Programmable Gate Array (FPGA) chip, in order to compare between them. The simulation result shows that the proposed system for 8-bit, 16-bit, and 32bit MAC unit reduces area by 6.25%, 3.2 %, and 2.5% and increases the speed by 14%, 16%, and 19% respectively. The experimental test for the proposed 8-bit MAC is done using XESS demo board (XSA-100, Spartan-X2S100tq144).

Original languageEnglish
Article number4253359
Pages (from-to)3199-3202
Number of pages4
JournalProceedings - IEEE International Symposium on Circuits and Systems
StatePublished - 2007
Event2007 IEEE International Symposium on Circuits and Systems, ISCAS 2007 - New Orleans, LA, United States
Duration: May 27 2007May 30 2007


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