System for obtaining strict solution in accordance with accuracy of approximate solutions
Patent 5631858 Issued on May 20, 1997. Estimated Expiration Date: 
May 20, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 20, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3590229 3892952 3928756 Inventors
AssigneeApplicationNo. 089103 filed on 08/12/1993US Classes:708/443DifferentiationExaminersPrimary: Mai, Tan V.Attorney, Agent or FirmInternational ClassG06F 007/38Foreign Application Priority Data1988-11-04 JPAbstractA multiplication, division and square root extraction apparatus which calculates the solutions to addition, division and square root extraction functions by approximation using iteration has a multiplier, an adder-subtracter and a shifter of prescribed bit width connected to a bus. Iteration is conducted by inputting the output of the multiplier to the adder-subtracter or the shifter and returning the result to the input of the multiplier via the bus. A shifter and an arithmetic and logic unit connected to a second bus connected to the aforesaid bus via a switch have a greater bit width than the prescribed bit width and are used for large scale calculations, thus preventing a reduction in processing speed. | |
