Development of NEC7720, Origin of Programmable DSP Chip

Nishitani, T.

doi:10.1109/histelcon.2017.8535855

Cited by 1 publication

(1 citation statement)

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“…Due to the high capacitive load and large bit-width, these MAC structures become the most energy-consuming units in modern Digital Signal Processors. In the NEC's 16-bit SPX processor, for example, two MAC units dissipate almost 2/3 of the total power [1]. As result optimizing the MAC for energy is important.…”

Section: Motivationmentioning

confidence: 99%

Dynamic operand transformation for low-power multiplier-accumulator design

Fujino

Moshnyaga

Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03.

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The design of portable battery-operated devices requires low-power computation circuits. This paper presents a new multiplier-accumulator (MAC) design approach, which in contrast to existing methods exploits dynamic operand transformation to reduce power consumption. The key idea is to compare current values of input operands with previous values and depending on computed Hamming distance to use either onginal or two's complement form of the operands in order to decrease the transition activity of multiplication. Experiments show that such a formulation outperforms the related approaches minimizing the power dissipation of traditional MAC design almost by half with 31% area and 12% delay overhead. The circuit implementation is outlined.

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Section: Motivationmentioning

confidence: 99%

Dynamic operand transformation for low-power multiplier-accumulator design

Fujino

Moshnyaga

Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03.

View full text Add to dashboard Cite

show abstract

Development of NEC7720, Origin of Programmable DSP Chip

Cited by 1 publication

References 5 publications

Dynamic operand transformation for low-power multiplier-accumulator design

Dynamic operand transformation for low-power multiplier-accumulator design

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