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    • 2. 发明专利
    • Operational circuit
    • 操作电路
    • JP2005011272A
    • 2005-01-13
    • JP2003177409
    • 2003-06-23
    • Oki Electric Ind Co Ltd沖電気工業株式会社
    • NATSUME KENICHI
    • G06F7/505G06F7/50G06F7/509
    • G06F7/5095
    • PROBLEM TO BE SOLVED: To provide an arithmetic circuit wherein the delay from input of a calculated data to output of a calculation result can be reduced as much as possible.
      SOLUTION: This arithmetic circuit is provided with a first selector 11 wherein one input data DA and a fixed data "0" are inputted and the data is selected and outputted by a control signal ENB, a second selector 10 wherein the other input data DB and an output data of a register are inputted and the data is selected and outputted by the control signal ENB, an adder 12 inputting the output SA of the first selector 11 and the output SB of the second selector 10 to calculate SA+SB and a register 13 inputting the output SO of the adder 12 and holds the output synchronized with a clock signal.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:提供一种算术电路,其中可以尽可能地减少从计算数据的输入到计算结果的输出的延迟。 解决方案:该算术电路设置有第一选择器11,其中输入一个输入数据DA和固定数据“0”,并且数据由控制信号ENB,第二选择器10选择和输出,其中另一个输入 数据DB和寄存器的输出数据被输入,数据由控制信号ENB选择和输出,加法器12输入第一选择器11的输出SA和第二选择器10的输出SB,以计算SA + SB 以及寄存器13,其输入加法器12的输出SO,并保持与时钟信号同步的输出。 版权所有(C)2005,JPO&NCIPI
    • 10. 发明专利
    • Carry preserving adder
    • 携带保存添加
    • JPS61114336A
    • 1986-06-02
    • JP23463284
    • 1984-11-07
    • Toshiba CorpToshiba Micro Comput Eng Corp
    • SAKAGAMI KENJI
    • G06F7/505G06F7/50G06F7/508G06F7/509
    • G06F7/5095
    • PURPOSE:To attain the processing at a high speed with a carry preserving adder by constituting a unit circuit equivalent to a digit with an addition means, a data memory means, a data detection memory means, etc. CONSTITUTION:Both the addition data and the carry data stored in an arithmetic processing part consisting of a unit circuit 22 equivalent to four digits are given to an external addition part 21 and added together. Thus the final addition data f0-f6 including the carry data C are delivered. The circuit 22 consists of half-adders 31 and 32, accumulators 33 and 34 containing a flip-flop respectively, carry registers 35-38, an OR gate 39 and an AND gate 40. While the part 21 includes eight full adders 51-58 and four half adders 61-64.
    • 目的:通过构成与加法装置等同于数字的单位电路,通过进位保存加法器高速地进行处理,数据存储装置,数据检测存储装置等。构成:添加数据和 存储在由等效于四位数的单元电路22组成的算术处理部分中的数据传送给外部附加部分21并相加在一起。 因此,传递包括进位数据C的最终加法数据f0-f6。 电路22由半加法器31和32组成,分别包含触发器的累加器33和34,进位寄存器35-38,“或”门39和“与”门40.虽然部分21包括八个全加器51-58 和四个半加法器61-64。