The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 05, 2022
Filed:
Apr. 24, 2019
Applicant:
Fujitsu Limited, Kawasaki, JP;
Inventor:
Shiro Kamoshida, Kawasaki, JP;
Assignee:
FUJITSU LIMITED, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 7/503 (2006.01); G06F 7/505 (2006.01); G06F 7/575 (2006.01);
U.S. Cl.
CPC ...
G06F 7/503 (2013.01); G06F 7/505 (2013.01); G06F 7/575 (2013.01);
Abstract
An adder-subtractor circuit includes an inverting circuit configured to invert a first operand on a bit-by-bit basis to output a first inverted operand, a circuit having a function to perform a predetermined arithmetic operation and configured to output a second operand, a carry generating circuit configured to generate carries from the first inverted operand and the second operand, and an XOR circuit configured to perform a bit-by-bit XOR on the carries, the first operand, and the second operand.