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    • 3. 发明授权
    • Digit-serial transversal filters
    • 数字串行横向滤波器
    • US5034908A
    • 1991-07-23
    • US504503
    • 1990-04-02
    • Richard I. HartleyPeter F. CorbettFathy F. YassaSharbel E. Noujaim
    • Richard I. HartleyPeter F. CorbettFathy F. YassaSharbel E. Noujaim
    • G06F7/52H03M9/00
    • G06F7/5312H03M9/00
    • One type of transversal filter using digit-serial signals in its operation comprises a to-digit-serial converter for converting a succession of input data words received at its input port each to a respective succession of m-bit-wide digits supplied from its output port in order of progressively greater significance, m being a positive plural integer; a clocked delay line having an input tap connected for responding to the m-bit-wide digits supplied from the output port of the to-digit-serial converter and having at least one further tap for supplying a respective tap signal; and means for performing a weighted summation of the input signal to the clocked delay line and each tap signal from the clocked delay line, to generate a filter response in digit-serial format. Another type of transversal filter, which uses digit-serial signals in its operation, comprises a plurality, p in number, of parallel-to-digit-serial converters, each for generating a respective m-bit-wide digit-serial data stream by converting n-parallel-bit words in an input signal to the digital filter, m being a positive integer and n being the product of m and p; a plurality of tapped delay lines having respective input taps connected from respective ones of said parallel-to-digit-serial converters and each having at least one further tap; means for generating p different phases of filter response in digit-serial form by weighting and summing digital signals taken from respective taps on ones of the p tapped delay lines; and p digit-serial-to-parallel converters for converting, on a cyclic basis, the different phases of filter response to parallel-bit words in an output signal from the digital filter.
    • 在其操作中使用数字串行信号的一种类型的横向滤波器包括一个数字串行转换器,用于将在其输入端口处接收的一系列输入数据字转换成从其输出端提供的各个相继的m位宽数字 端口按顺序逐渐显现,m为正整数; 时钟延迟线具有连接的输入抽头,用于响应从位数字串行转换器的输出端口提供的m位宽数字,并具有用于提供相应抽头信号的至少一个另外的抽头; 以及用于对来自时钟延迟线的时钟延迟线和每个抽头信号执行输入信号的加权求和的装置,以产生数字串行格式的滤波器响应。 在其操作中使用数字串行信号的另一种类型的横向滤波器包括多个并行数字串行转换器,每个转换器用于通过以下步骤产生相应的m位宽数字串行数据流: 将输入信号中的n个并行位字转换为数字滤波器,m是正整数,n是m和p的乘积; 多个抽头延迟线,其具有从相应的所述并行到数字串行转换器连接的各个输入抽头,并且每个具有至少一个另外的抽头; 用于以数字串行形式产生滤波器响应的p个不同相位的装置,用于通过对从所述p个抽头延迟线中的一个上的各个抽头获得的数字信号进行加权和求和; 和p位串行到并行转换器,用于在来自数字滤波器的输出信号中循环地将滤波器响应的不同相位转换成并行位字。
    • 6. 发明授权
    • Subsampling time-domain digital filter using sparsely clocked output
latch
    • 使用稀疏时钟输出锁存器的子采样时域数字滤波器
    • US4982353A
    • 1991-01-01
    • US414869
    • 1989-09-28
    • Philippe L. JacobSharbel E. NoujaimGlenn A. FormanJohn A. Mallick
    • Philippe L. JacobSharbel E. NoujaimGlenn A. FormanJohn A. Mallick
    • G06F5/06G06F7/62
    • G06F7/62G06F5/06
    • The plural-phase clocking signal used in a subsampling time-domain digital filter is partially blanked to generate a sparse clocking signal for a clocked data latch that decimates the output signal from the digital filter, to supply it at a subsampling rate as compared to the sampling rate of input signal to the filter. The blanking signal is generated from a counter that counts occurrences of pulses in the plural-phase clocking signal, which counter comprises a ripple-carry adder and another clocked data latch arranged to accumulate successive unit values. This procedure guarantees correct timing of clocking signal for the output latch vis-a-vis the plural-phase clocking signal used in the preceding time-domain digital filter despite the time taken for carry ripplethrough in the counter adder. Digital hardware is conserved by blanking only one phase of the plural-phase clocking signals.
    • 在子采样时域数字滤波器中使用的多相时钟信号被部分消隐,以产生用于对来自数字滤波器的输出信号进行抽取的时钟数据锁存器的稀疏时钟信号,以将其与子采样时间信号 输入信号到滤波器的采样率。 消隐信号由计数器产生,该计数器对多相时钟信号中的脉冲发生进行计数,该计数器包括纹波进位加法器和另一个计时数据锁存器,被布置为累积连续的单位值。 尽管在计数器加法器中进行进位纹波的时间,该过程保证输出锁存器对于前一时域数字滤波器中使用的多相时钟信号的时钟信号的正确定时。 数字硬件通过仅消除多相时钟信号的一相来节省。
    • 9. 发明授权
    • Circuit for generating the square of a function without multipliers
    • 用于生成没有乘数的函数的平方的电路
    • US4766416A
    • 1988-08-23
    • US74374
    • 1987-07-16
    • Sharbel E. Noujaim
    • Sharbel E. Noujaim
    • G06J1/00H02H1/00H03M1/00
    • H02H1/0007G06J1/00
    • A pair of feedback accumulators are employed in conjunction with an oversampled analog to digital converter to generate the squared binary representation of the analog input signal. Advantage is taken of the particular form of the output waveform from oversampled analog to digital converter circuits to generate not only a standard digital output, but also the squared output after a plurality of bit-time periods L. The circuit avoids the utilization of digital multiplier circuits to perform the squaring function. The circuit is particularly applicable in the construction of electronic circuit breakers which must compute a binary representation of the square of an analog input current level signal, I.sup.2.
    • 一对反馈累加器与过采样模数转换器结合使用以产生模拟输入信号的平方二进制表示。 优点来自过采样模数转换器电路的输出波形的特定形式,不仅产生标准数字输出,而且在多个位时间段L之后产生平方输出。该电路避免了数字乘法器的使用 执行平方功能的电路。 该电路特别适用于必须计算模拟输入电平电平信号I2的二进制表示的电子断路器的构造。