High speed low power 4-2 compressor

Details High speed low power 4-2 compressor High speed low power 4-2 compressor

2005-06-07

2005-06-07

Mai, Tan V. (Department: 2124)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

Reexamination Certificate

active

06904447

ABSTRACT:
A high speed low powered 4-2 compressor according to the present invention performs an XOR/XNOR operation of input data by using a single input type NAND/NOR logic circuit and a dual input type NAND/NOR logic circuit. Thus, delays to generate complementary signals are avoided. In addition, the 4-2 compressor uses a single railed multiplexer instead of a dual railed multiplexer, so that gate drive nodes and internal load capacitance are reduced. As a result, circuit area and power consumption of the 4-2 compressor are reduced.

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“Design of High-Speed Low-Power 3-2 Counter and 4-2 Compressor for Fast Multipliers”, Hsiao, et al., Electronics Letters, Feb. 19, 1998, vol. 34 No. 4, pp. 341-343.

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