Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reexamination Certificate
2006-01-03
2006-01-03
Ngo, Chuong D (Department: 2193)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
Reexamination Certificate
active
06983297
ABSTRACT:
A log shifter shifting an operand left or right while minimizing the number of multiplexor stages. The log shifter may contain a set of multiplexor stages, with at least one multiplexor stage shifting a data value to the right and at least one other multiplexor stage shifting to the right. Left and right shifts may thus be obtained by using a single set of multiplexor stages. As a result, time delays and area consumed may be reduced when the upper/lower end of a desired shift value range does not equal 2Q−1, wherein Q equals an integer.
REFERENCES:
patent: 4829460 (1989-05-01), Ito
patent: 5726926 (1998-03-01), Makino
patent: 5961575 (1999-10-01), Hervin et al.
patent: 5978822 (1999-11-01), Muwafi et al.
Gupte Ajit
Menon Amitabh
Brady III W. James
Marshall, Jr. Robert D.
Ngo Chuong D
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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