Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reexamination Certificate
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.
Mai Tan V.
Mills & Onello LLP
Samsung Electronics Co,. Ltd.
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