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    • 4. 发明申请
    • APPARATUS AND METHOD FOR ADDING MULTIPLE-BIT BINARY STRINGS
    • 用于添加多位二进制字符串的装置和方法
    • WO2004025453A8
    • 2004-07-29
    • PCT/US0328393
    • 2003-09-09
    • ANALOG DEVICES INC
    • JALFON MICHEL
    • G06F7/50G06F7/509
    • G06F7/509G06F7/4991
    • Apparatus for determining a value, a sign and an overflow status of an addition of at least three n-bit data inputs. The apparatus comprising : a first adder, for adding the at least three n-bit data inputs, to provide a first output having at least 2n bits; a second adder for adding a portion of bits of the first output, the second adder being operable to add a plurality of m-bit addends, m being smaller than or equal to n. The apparatus further comprising at least two electronic-circuits, operatively associated with the first adder and the second adder. The first adder, the second adder and the at least two electronic-circuits are constructed and designed to obtain the value, the overflow status and a sign of the addition of the at least three data inputs, using predetermined parity rules being associated with a parity characteristic of the at least three data inputs.
    • 用于确定添加至少三个n位数据输入的值,符号和溢出状态的装置。 所述设备包括:第一加法器,用于添加所述至少三个n位数据输入,以提供具有至少2n位的第一输出; 第二加法器,用于添加第一输出的一部分比特,第二加法器可操作以添加多个m比特加数,m小于或等于n。 该设备还包括至少两个电子电路,其与第一加法器和第二加法器可操作地相关联。 第一加法器,第二加法器和至少两个电子电路被构造和设计成使用与奇偶校验相关联的预定奇偶校验规则来获得值,溢出状态和至少三个数据输入的相加的符号 至少三个数据输入的特征。
    • 5. 发明申请
    • METHOD AND APPARATUS FOR PERFORMING SINGLE-CYCLE ADDITION OR SUBTRACTION AND COMPARISON IN REDUNDANT FORM ARITHMETIC
    • 用于执行单周期添加或减少的冗余方法和比较方法
    • WO01046795A2
    • 2001-06-28
    • PCT/US2000/042165
    • 2000-11-13
    • G06F7/02G06F7/48G06F7/50G06F7/509G06F7/38
    • G06F7/5095G06F7/02G06F7/4824
    • A method and apparatus is disclosed that uses an arithmetic circuit for adding numbers represented in a redundant form to also subtract numbers received in redundant form, including numbers received from a bypass circuit. A non-propagative comparator circuit is then used to compare a given value with a result from the arithmetic circuit to determine if the result is equal to the given value. All of the operations described above can be accomplished without propagating carry signals throughout the circuitry. The method includes generating a complemented redundant form of at least one number supplied to the arithmetic circuit in redundant form. It also includes providing adjustment input to the arithmetic circuit to augment a result produced through the arithmetic circuit. This adjustment causes the arithmetic circuit to generate a valid outcome in redundant form as a result of a subtraction operation if the arithmetic oepration is subtraction. Then the result is compared to a given value using a non-propagative comparator to determine equality or inequality of the result to the given value.
    • 公开了一种方法和装置,其使用运算电路来添加以冗余形式表示的数字,还可以减去以冗余形式接收的数字,包括从旁路电路接收的数字。 然后使用非传播比较器电路将给定值与运算电路的结果进行比较,以确定结果是否等于给定值。 可以在整个电路中不传播进位信号来实现上述所有操作。 该方法包括以冗余的形式生成提供给运算电路的至少一个数的补码冗余形式。 它还包括向算术电路提供调整输入以增加通过运算电路产生的结果。 如果算术运算是减法运算,则该调整将使运算电路产生冗余形式的有效结果作为减法运算的结果。 然后将结果与使用非传播比较器的给定值进行比较,以确定结果与给定值的相等或不等式。
    • 10. 发明申请
    • SYSTEM AND METHOD OF PERFORMING TWO’S COMPLEMENT OPERATIONS IN A DIGITAL SIGNAL PROCESSOR
    • 在数字信号处理器中执行两次补充操作的系统和方法
    • WO2006128074A1
    • 2006-11-30
    • PCT/US2006/020635
    • 2006-05-25
    • QUALCOMM INCORPORATEDKRITHIVASAN, ShankarKOOB, Christopher Edward
    • KRITHIVASAN, ShankarKOOB, Christopher Edward
    • G06F7/509
    • G06F7/509G06F7/544G06F2207/5442
    • A method of completing a two's complement operation includes receiving a plurality of byte values and splitting the plurality of byte values into a first portion and a second portion. Further, the method includes inputting the first portion to a first segment of a first four-to-two compressor, performing a first four-to-two compression operation on the first portion to generate a first set of results having a first row and a second row that is offset one bit from the first row, and carrying in a first value of one to complete a first two's complement operation. The method also includes inputting the second portion to a second segment of a second four-to-two compressor and adding two values of one immediately to the right of the second portion in order to carry in a second value of one to the second portion to complete a second two's complement operation.
    • 完成二进制补码操作的方法包括接收多个字节值并将多个字节值分割成第一部分和第二部分。 此外,所述方法包括将第一部分输入到第一四对二压缩机的第一段,对第一部分执行第一四到二压缩操作,以产生具有第一行和第二部分的第一组结果 第二行与第一行偏移一位,并携带第一个值,以完成前两个补码操作。 该方法还包括将第二部分输入到第二四对二压缩机的第二部分,并且立即将第二部分的第二部分加到第二部分的右侧,以便将第二部分的第二部分加到第二部分的第二部分 完成二分之二的补充操作。