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    • 6. 发明申请
    • LOGARITHMIC GAIN ADJUSTER
    • 对数增益调节器
    • WO2011124649A1
    • 2011-10-13
    • PCT/EP2011/055440
    • 2011-04-07
    • ICERA INCFELIX, Stephen
    • FELIX, Stephen
    • G06F7/53
    • G06F7/523G06F7/53
    • A circuit for multiplying a digital signal by a variable gain, controlled in dependence on a digital gain control value. The circuit comprises: a multiplier input for receiving the digital signal; a multiplier output for outputting the digital signal multiplied by the gain; a plurality of multiplier stages each arranged to multiply by a respective predetermined multiplication factor; and switching circuitry arranged so as to apply selected ones of the multiplier stages in a multiplication path between the input and output, in dependence on the digital gain control value. The multiplication factors are arranged such that binary steps in the digital gain control value result in logarithmic steps in said gain.
    • 用于将数字信号乘以可变增益的电路,其根据数字增益控制值进行控制。 该电路包括:用于接收数字信号的乘法器输入; 用于输出乘以增益的数字信号的乘法器输出; 多个乘法器级,每个乘法器级布置成乘以相应的预定乘法因子; 以及开关电路,其被布置为根据数字增益控制值在输入和输出之间的乘法路径中施加选择的乘法器级。 乘法因子被布置成使得数字增益控制值中的二进制步长导致所述增益中的对数步长。
    • 7. 发明申请
    • METHOD AND APPARATUS FOR MULTIPLYING BINARY OPERANDS
    • 用于二进制运算的方法和装置
    • WO2009063050A1
    • 2009-05-22
    • PCT/EP2008/065554
    • 2008-11-14
    • TEXAS INSTRUMENTS DEUTSCHLAND GMBHWIENCKE, Christian
    • WIENCKE, Christian
    • G06F7/53
    • G06F7/5306G06F2207/3816G06F2207/382
    • Method and apparatus for multiplying a signed first operand of na bits and a signed second operand of nb bits, wherein na and nb are different positive integer numbers, the method comprising generating single bit products of pairs of a single bit from the signed first operand and a single bit from the signed second operand with a logical AND function to produce na times nb single bit products, selectively inverting for the signed first operand and the signed second operands the single bit products of the first operand bit na-1 multiplied with the second operand bits 0 to nb-2, selectively inverting the single bit products of the signed second operand bits 0 to na-2 multiplied with the signed second operand bit nb-1, after the step of inverting adding the single bit products in accordance with their respective order for producing an intermediate product, and adding a "1" bit value at bit positions nb-1, na-1 and na+nb-1 for receiving a final product.
    • 用于将n比特的带符号的第一操作数和nb比特的带符号的第二操作数相乘的方法和装置,其中,na和nb是不同的正整数,所述方法包括从签名的第一操作数生成单个比特对的单个比特产物,以及 从具有逻辑AND函数的带符号的第二操作数中的单个位产生na次nb单位乘积,对于带符号的第一操作数和带符号的第二操作数有选择地反相,第一操作数位na-1的单位乘积与第二操作数乘以第二操作数 操作数位0到nb-2,在反转步骤之后,选择性地将符号的第二操作数位0到na-2的单位乘积与符号的第二操作数位nb-1相乘,根据它们 产生中间产品的相应顺序,以及在用于接收最终产品的位位置nb-1,na-1和na + nb-1处添加“1”比特值。
    • 8. 发明申请
    • MULTIPLIER WITH LOOK UP TABLES
    • 具有查看表的乘法器
    • WO2004051456A2
    • 2004-06-17
    • PCT/IB0305095
    • 2003-11-11
    • KONINKL PHILIPS ELECTRONICS NVHUBERT GERARDUS T M
    • HUBERT GERARDUS T M
    • G06F7/52G06F7/53G06F7/00
    • G06F7/5334G06F7/49931G06F7/5318
    • A method of performing modular multiplication of integers X and Y to produce a result R, where R = X.Y mod N, in a multiplication engine. X is fragmented into a first plurality of words xn each having a first predetermined number of bits, k and Y is fragmented into a second plurality of words yn each having a second predetermined number of bits, m. Multiples of a word xn of X are derived in a pre-calculation circuit and subsequently used to derive products of the word xn of X with each of the plurality of words yn of Y. An intermediate result Rj is calculated as a cumulating sum derived from said pre-calculated multiples and the steps repeated for each successive word of X so as to generate successive intermediate results, Rj, for each of the first plurality of words xn. The final result, R is obtained from the last of the intermediate results Rn-1.
    • 执行整数X和Y的模数乘法以在乘法引擎中产生结果R(其中R = X.Y mod N)的方法。 X被分割成具有第一预定位数的第一多个单词xn,k和Y被分段成每个具有第二预定位数m的第二多个单词yn。 X的单词xn的倍数在预计算电路中导出,随后用于以Y的多个单词yn中的每一个Yn得出X的单词xn的乘积。中间结果Rj被计算为从 对于X的每个连续字重复所述预先计算的倍数和步骤,以便为第一多个单词xn中的每一个生成连续的中间结果R j。 最后的结果是从最后一个中间结果Rn-1得到R。
    • 9. 发明申请
    • DIGITAL VALUE PROCESSOR
    • 数字处理器
    • WO00033174A1
    • 2000-06-08
    • PCT/EP1999/008407
    • 1999-11-03
    • G06F7/53G06F7/38G06F7/523G06F7/552H04J13/00
    • G06F7/552G06F2207/5523
    • The present application relates to a device and method for processing a digital value to thereby determine an estimate of the square of said digital value. This is done by linearly approximating the square function with the help of anchor points that are powers of 2, such that the estimate of the square of a digital value xa is determined on the basis of a first processing value 2 , where 2 , and a second processing value (3xa - 2 ). The present invention is advantageous in that it allows simple processing steps and a simple processing hardware. It is preferably applied to the mean signal power estimation of a digital signal being sent to a transmitter.
    • 本申请涉及一种用于处理数字值从而确定所述数字值的平方的估计的装置和方法。 这通过使用功率为2的锚点的线性逼近平方函数来完成,使得基于第一处理值2确定数字值xa的平方的估计,其中2 和第二处理值(3xa-2i + 1)。 本发明的优点在于它允许简单的处理步骤和简单的处理硬件。 优选地应用于发送到发射机的数字信号的平均信号功率估计。