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    • 1. 发明授权
    • Enciphering and deciphering apparatus, and enciphering and deciphering method
    • 加密和解密装置,以及加密和解密方法
    • US07317794B2
    • 2008-01-08
    • US10378982
    • 2003-03-03
    • Hiroshi NozawaMasao TakayamaYoshikazu Fujimori
    • Hiroshi NozawaMasao TakayamaYoshikazu Fujimori
    • H04L9/28
    • H04L9/302H04L2209/12
    • The present invention aims at providing a novel enciphering and deciphering apparatus and an enciphering and deciphering method related thereto, which are respectively capable of contracting the time required for enciphering and deciphering processes and decreasing the number of logic gates provided in the apparatus. Essentially based on an equation Xki=1+Σ((J=1, i)iCj·Xk−1j) and also based on an initial value consisting of a group of power raising values Xk0j corresponding to j=1 through m in relation to k−1=k0, an arithmetic operating unit 21 seeks a second expression Yk1 by serially computing a group of power raising values Xki corresponding to i=1 through m in relation to one unit of k shown in the above equation in a range from k=k0+1 up to k=k1 by applying binomial coefficients stored in a coefficient memory unit 17. Accordingly, once those binomial coefficients corresponding to predetermined integers n and m are stored in memory, thenceforth, it is possible to contract the time required for executing an enciphering or deciphering process related to identical integers n and m.
    • 本发明旨在提供一种新颖的加密和解密装置及其相关的加密和解密方法,它们能够缩短加密和解密处理所需的时间并减少设备中提供的逻辑门数。 基本上基于方程式X 1 i S iΣΣ((J = 1,i)< i< 并且还基于由一组增力值组成的初始值X< k>< j>< j> 相对于k-1 = k0对应于j = 1到m的算术运算单元21通过串联计算一组功率提升值X 存储在系数存储单元17中的系数。 因此,一旦对应于预定的整数n和m的二项式系数被存储在存储器中,则可以缩小执行与相同的整数n和m相关的加密或解密处理所需的时间。
    • 2. 发明授权
    • Coding-decoding device and method for conversion of binary sequences
    • 用于转换二进制序列的编码解码装置和方法
    • US07039847B2
    • 2006-05-02
    • US10238984
    • 2002-09-09
    • Hiroshi NozawaShinzo KoyamaMasao TakayamaYoshikazu Fujimori
    • Hiroshi NozawaShinzo KoyamaMasao TakayamaYoshikazu Fujimori
    • G11C29/00
    • G11C7/1006
    • A coding-decoding device and a coding-decoding method that take less time for coding and decoding are provided while using less number of logic gates. A memory device 15 substantially stores b pieces of conversion logic equations produced with a conversion logic equation producing device 13. An operation device 17 has a programmable hardware logic circuit to constitute logics sequentially according to plural execution unit logic equations obtained by dividing b pieces of conversion logic equations stored in the memory device 15 into execution units for respective execution unit logic equations using the hardware logic circuit. Besides, the operation device 17 sequentially divides and calculates the second sentences from the first sentences according to the constituted logics. An output device 19 collects and outputs the second sentences calculated with the operation device 17.
    • 在使用较少数量的逻辑门的同时,提供了编码解码装置和编码解码方法,其中编码解码时间较短。 存储器装置15基本上存储由转换逻辑方程产生装置13产生的b个转换逻辑方程式。 操作装置17具有可编程硬件逻辑电路,以根据通过使用硬件逻辑电路将存储在存储器件15中的b个转换逻辑方程分成执行单元逻辑方程而获得的多个执行单元逻辑方程来顺序地构成逻辑 。 此外,操作装置17根据构成的逻辑顺序地分割和计算来自第一句子的第二句子。 输出装置19收集并输出用操作装置17计算的第二句子。
    • 4. 发明申请
    • OFFSET CORRECTION DEVICE OF COMPARATOR
    • 比较器偏移校正装置
    • US20120293346A1
    • 2012-11-22
    • US13564496
    • 2012-08-01
    • Masao TakayamaKazuo Matsukawa
    • Masao TakayamaKazuo Matsukawa
    • H03L5/00H03M3/02H03M1/12
    • H03M1/1023H03K3/356139H03K5/2481H03K5/249H03M1/36
    • A comparator offset correction device opens an open switch 205 and closes a short-circuit switch 204 in offset correction of a comparator 201. In this state, a controller 203 allows the comparator 201 to repeat, more than once, the operation of comparing reference voltages 101 input to two input terminals with each other. The filter 202 outputs a frequency signal obtained by smoothing a plurality of comparison results. Based on the frequency signal from the filter 202, the controller 203 outputs a threshold value control signal to the comparator 201 so that the ratio of a high-level voltage to a low-level voltage in the results of the comparison in the comparator 201 is 50%. Thus, even when a current which will be input may differ from a current which is currently input due to, for example, the influence of noise, the threshold value offset amount is normally corrected.
    • 比较器偏移校正装置打开开关205并在比较器201的偏移校正中闭合短路开关204.在该状态下,控制器203允许比较器201多次重复比较参考电压 101输入到两个输入端子。 滤波器202输出通过平滑多个比较结果而获得的频率信号。 基于来自滤波器202的频率信号,控制器203向比较器201输出阈值控制信号,使比较器201中的比较结果中的高电平电压与低电平电压的比率为 50%。 因此,即使当输入的电流可能与由于例如噪声的影响而当前输入的电流不同时,通常校正阈值偏移量。
    • 10. 发明申请
    • DELTA-SIGMA MODULATOR AND WIRELESS COMMUNICATION DEVICE
    • DELTA-SIGMA调制器和无线通信设备
    • US20110200077A1
    • 2011-08-18
    • US13094519
    • 2011-04-26
    • Yosuke MITANIKazuo MatsukawaMasao TakayamaShiro Dosho
    • Yosuke MITANIKazuo MatsukawaMasao TakayamaShiro Dosho
    • H04B1/38H03M3/02
    • H03M3/388H03M3/424H03M3/456
    • In a DSM including a loop in which an output signal of a quantizer is digitally processed, and fed back through a DAC to an analog filter, the quantizer quantizes an analog signal from an analog filter section to output a digital signal. The digital signal from the quantizer is digitally processed in a first-order recursive filter circuit including a variable gain amplifier and a delay element. A LUT receives both the digital signal from the quantizer and a table control signal, which is an output signal from the recursive filter circuit, and stores in advance compensation values corresponding to the both signals. A compensation value from the LUT is used to provide a digital output signal compensated for a delay. The digital output signal is converted into an analog signal in the DAC, and then subtracted from an analog input signal in the analog filter section.
    • 在包括量化器的输出信号被数字处理并通过DAC反馈到模拟滤波器的环路的DSM中,量化器对来自模拟滤波器部分的模拟信号进行量化以输出数字信号。 来自量化器的数字信号在包括可变增益放大器和延迟元件的一阶递归滤波器电路中进行数字处理。 LUT接收来自量化器的数字信号和作为来自递归滤波器电路的输出信号的表控制信号,并且预先存储对应于两个信号的补偿值。 来自LUT的补偿值用于提供补偿延迟的数字输出信号。 数字输出信号在DAC中转换为模拟信号,然后从模拟滤波器部分的模拟输入信号中减去。