Exponent encoder circuit and mask circuit

Details Exponent encoder circuit and mask circuit Exponent encoder circuit and mask circuit

2006-08-22

2006-08-22

Ngo, Chuong D. (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

C708S205000

Reexamination Certificate

active

07096241

ABSTRACT:
In order to provide an exponent encoder circuit for obtaining an exponent constituted by a left shift amount for normalizing input data with code bits, there is provided a first logic circuit for inverting data portions other than code bits and shifting the code bits to least significant bit positions when inputted data is a negative number and allowing data portions other than the code bits to pass as is and moving the code bits to least significant bit positions when the inputted data is a positive number, and a second logic circuit for putting a plurality of logic operation equations for obtaining each bit of an exponent from output of the first logic circuit as decided by a truth table for outputs of the first logic circuit and corresponding exponents in a form where common terms are cancelled out.

REFERENCES:
patent: 5345405 (1994-09-01), Walsh et al.
patent: 5383142 (1995-01-01), Chung
patent: 5553012 (1996-09-01), Buss et al.
patent: 5657260 (1997-08-01), Makino
patent: 5726924 (1998-03-01), Buss et al.
patent: 62-229436 (1987-10-01), None
patent: 4-167124 (1992-06-01), None
patent: 8-212055 (1996-08-01), None
patent: 2000-259392 (2000-09-01), None

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