Boots – shoes – and leggings
Patent
1997-05-02
1999-01-19
Ngo, Ohuong Dinh
Boots, shoes, and leggings
G06F 738
Patent
active
058620680
ABSTRACT:
An arithmetic circuit with a small number of parts performs high-speed arithmetic operations for calculating a square-root of a sum of squares of two numbers. Absolute values of two inputs S.sub.in1 and S.sub.in2 are determined by absolute value calculators and are compared by an absolute value comparator According to the comparison result, a first multiplexer selects the smaller of the two absolute values and a second multiplexer selects the larger of the two absolute values. The smaller absolute value is shifted by a 2-bit right shifter and by a 3-bit right shifter respectively, and the obtained shifted results are added together by a (N-2)-bit adder. The sum of the shifted values is then added by a N-bit adder to the larger absolute value. A square-root of the square-sum of two inputs S.sub.in1 and S.sub.in2 is thus approximately determined,
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Filip, "A Baker's Dozen Magnitude Approximations and Their Detection Statistics", IEEE Transactions On Aerospace And Electronic Systems, Jan. 1976, USA, vol. AES-12, No. 1, ISSN 0018-9251, pp. 86-89, XP002035639.
Dual 64 Tap, 11 Mcps Digital Matched Filter Stel-3340 (Stanford Telecommunications, Inc.) pp. 1-12, 1992.
Ngo Ohuong Dinh
Sharp Kabushiki Kaisha
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