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    • 23. 发明专利
    • Encoder of multiplier using booth algorithm
    • 使用引导算法的乘法器编码器
    • JP2005228349A
    • 2005-08-25
    • JP2005036845
    • 2005-02-14
    • Samsung Electronics Co Ltd三星電子株式会社Samsung Electronics Co.,Ltd.
    • RHEE YOUNG-CHUL
    • G06F7/53G06F7/52G06F7/523G06F7/533
    • G06F7/5336
    • PROBLEM TO BE SOLVED: To provide an encoder of a multiplier using a Booth algorithm. SOLUTION: The encoder of the multiplier for multiplying a plural bits of multiplier data with a plural bits of multiplicand data is provided with an operator generating part and a partial-product data generating part. The operator generating part encodes the multiplier data to output a plurality of operators. The partial-product data generating part receives the multiplicand data and outputs the plural bits of partial-product data in response to 1 bit data among the multiplier data and the plurality of operators. The operator generating part is provided with a plurality of encoding cells and the respective encoding cells encode adjacent 2 bit data among the plural bits of multiplication data to output the plurality of operators. Thus, operating speed of the encoder can be increased by generating an operator for selecting codes prior to other operators. COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:使用布斯算法提供乘法器的编码器。 解决方案:乘法器的编码器具有乘法器产生部分和部分乘积数据生成部分,用于将多位乘法器数据与多位被乘数数据相乘。 操作者生成部分对乘法器数据进行编码以输出多个操作符。 部分产品数据生成部分接收被乘数数据,并且响应于乘法器数据和多个运算符中的1位数据输出多位的部分乘积数据。 操作者生成部分设置有多个编码单元,并且各个编码单元在乘法数据的多个比特之中编码相邻的2比特数据,以输出多个运算符。 因此,可以通过生成用于在其他操作者之前选择代码的操作者来增加编码器的操作速度。 版权所有(C)2005,JPO&NCIPI
    • 25. 发明专利
    • Arithmetic unit for multiple length arithmetic of montgomery multiplication residues
    • 多元化遗留算法的多长度算术算术单元
    • JP2004258141A
    • 2004-09-16
    • JP2003046527
    • 2003-02-24
    • Fujitsu Ltd富士通株式会社
    • OKUMURA YOSHIKI
    • G06F7/53G06F7/52G06F7/533G06F7/544G06F7/72G09C1/00
    • G06F7/5338G06F7/5443G06F7/728
    • PROBLEM TO BE SOLVED: To reduce the delay time for subtraction in a block unit computing element and perform arithmetic operation while maintaining the operating frequency in a circuit for carrying out multiple length calculation of Montgomery multiplication residues. SOLUTION: In a complement mode, an encoder means 202 of a secondary Booth algorithm outputs a selection signal different from that in a normal mode wherein the multiplication A×B is performed, and a selection means 203 selects a partial product representing -A for the three bits b 1 , b 0 , b -1 of B and selects a partial product representing 0 for the other bits. An adding means 204 adds the partial product representing -A and 0, and outputs -A (two's complement number of A, or one's complement number of A). COPYRIGHT: (C)2004,JPO&NCIPI
    • 要解决的问题:为了减少在块单元计算元件中的减法的延迟时间并执行算术运算,同时将工作频率保持在用于执行蒙哥马利乘法残差的多长度计算的电路中。 解决方案:在补码模式中,辅助布斯算法的编码器装置202输出与正常模式不同的选择信号,其中执行乘法A×B,并且选择装置203选择表示 - A为B的三位b 1,B 0 ,b -1 ,并为其他位选择表示0的部分乘积。 添加装置204将表示-A和0的部分乘积相加,并输出-A(A的二进制数或A的补码)。 版权所有(C)2004,JPO&NCIPI