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公开(公告)号：EP0642216B1
公开(公告)日：2001-03-28
申请号：EP94113631.9
申请日：1994-08-31
发明人： White, Stanley A.
CPC分类号： G01C19/5607 , H03D3/005
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2.发明授权Estimator of amplitude and frequency of a noisy biased sinusoid from short bursts of samples 失效用于估计短采样块的有噪声，偏置正弦曲线的幅度和频率
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公开(公告)号：EP0037850A2
公开(公告)日：1981-10-21
申请号：EP80105733.2
申请日：1980-09-24
发明人： White, Stanley A.
CPC分类号： G06F7/5235 , G06F1/035 , G06F1/0353 , G06F1/0356 , G06F7/552 , G06F2101/08 , G06F2207/5523
摘要： A fully-parallel digital arithmetic device for obtaining the square, C 2 , of a value, C via parts of the value C and involving a reduction in memory requirements. Three square function ROM's are employed, one responsive to the most significant-bits half of a parallel input, the second ROM responsive to the least-significant bits half of the parallel input, and the third one responsive to the sum of said most significant bits and least-significant bits. The outputs of the square function ROM's are then combined and scaled to effect a square by parts of the applied input value, C. A pair of such arithmetic devices may be advantageously combined to economically effect the product AB of two values, A and B, in the manner of a quarter square multiplier.
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4.发明公开Estimator of amplitude and frequency of a noisy biased sinusoid from short bursts of samples 失效用于估计短采样块的有噪声，偏置正弦曲线的幅度和频率。
公开(公告)号：EP0638811A3
公开(公告)日：1996-04-10
申请号：EP94112437.2
申请日：1994-08-09
发明人： White, Stanley A.
摘要： The amplitude or frequency of a sinusoidal signal represented as sample values S₁, S₂, S₃, S₄ is estimated by computing a triplet of differences x₁, x₂, x₃, where x₁ is a difference between S₂ and S₁, x₂ is a difference between S₃ and S₂, and x₃ is a difference between S₄ and S₃. An indication of the estimate of the amplitude or frequency is computed as a ratio of algebraic functions of the differences x₁, x₂, x₃. The amplitude is computed as the square root of a first ratio of algebraic functions, and the frequency is computed as an arc-cosine function of a second ratio of algebraic functions. Preferably the ratio is evaluated by a division operation computed as a polynomial approximation, and the square root function and the arc-cosine function are also computed as a polynomial approximation. Preferably ratios computed from a plurality of triplets are averaged together to give more accurate estimates. Preferably any ratio having a denominator value that has a magnitude less than a threshold value is excluded from the average of the ratios, so that the average will not be corrupted by any inaccurate result that could be obtained when dividing by a relatively small number. The method can be used for compensating a parasitic capacitance, or for monitoring the health of a plurality of signals in an electronic circuit.
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5.发明公开Tracking filter and quadrature-phase reference generator 失效Wachlauffilter和Phasenquadraturreferenzgenerator。
公开(公告)号：EP0642216A1
公开(公告)日：1995-03-08
申请号：EP94113631.9
申请日：1994-08-31
发明人： White, Stanley A.
CPC分类号： G01C19/5607 , H03D3/005
摘要： A tracking filter has a tunable filter responsive to an input signal for producing a filtered output signal, a Hilbert transformer for producing an in-phase reference signal and a quadrature-phase reference signal from the filtered output signal, and a discriminator responsive to the input signal and the in-phase and quadrature-phase reference signals for producing a passband center frequency control signal and a passband width control signal for controlling the passband center frequency and the passband width of the tunable filter. The frequency discriminator performs complex demodulation of the input signal with the in-phase reference signals to produce respective in-phase and quadrature-phase baseband signals which are low-pass filtered. The quadrature-phase baseband signal is divided by the in-phase baseband signal. The quotient is integrated to produce the passband center frequency control signal. Preferably the baseband signals are also filtered by adjustable filters having passband center frequencies and passband widths controlled in response to the passband center frequency control signal and the passband width control signal, respectively. Preferably the tracking filter is a digital filter.
摘要翻译： 跟踪滤波器具有响应于用于产生滤波输出信号的输入信号的可调谐滤波器，用于产生同步参考信号的希尔伯特变换器和来自滤波的输出信号的正交参考信号，以及响应于输入的鉴频器 信号和用于产生通带中心频率控制信号的同相和正交相位参考信号，以及用于控制可调谐滤波器的通带中心频率和通带宽度的通带宽度控制信号。 鉴频器利用同相参考信号对输入信号进行复杂解调，以产生低通滤波的相位同相和正交相位基带信号。 正交基带信号被同相基带信号除。 集成商，产生通带中心频率控制信号。 优选地，基带信号也被具有通过频带中心频率和通带宽度的可调滤波器滤波，分别响应于通带中心频率控制信号和通带宽度控制信号而被控制。 优选地，跟踪滤波器是数字滤波器。
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6.发明公开Estimator of amplitude and frequency of a noisy biased sinusoid from short bursts of samples 失效用于估计短采样块的有噪声，偏置正弦曲线的幅度和频率。
公开(公告)号：EP0638811A2
公开(公告)日：1995-02-15
申请号：EP94112437.2
申请日：1994-08-09
发明人： White, Stanley A.
摘要： The amplitude or frequency of a sinusoidal signal represented as sample values S₁, S₂, S₃, S₄ is estimated by computing a triplet of differences x₁, x₂, x₃, where x₁ is a difference between S₂ and S₁, x₂ is a difference between S₃ and S₂, and x₃ is a difference between S₄ and S₃. An indication of the estimate of the amplitude or frequency is computed as a ratio of algebraic functions of the differences x₁, x₂, x₃. The amplitude is computed as the square root of a first ratio of algebraic functions, and the frequency is computed as an arc-cosine function of a second ratio of algebraic functions. Preferably the ratio is evaluated by a division operation computed as a polynomial approximation, and the square root function and the arc-cosine function are also computed as a polynomial approximation. Preferably ratios computed from a plurality of triplets are averaged together to give more accurate estimates. Preferably any ratio having a denominator value that has a magnitude less than a threshold value is excluded from the average of the ratios, so that the average will not be corrupted by any inaccurate result that could be obtained when dividing by a relatively small number. The method can be used for compensating a parasitic capacitance, or for monitoring the health of a plurality of signals in an electronic circuit.
摘要翻译： 代表作为样本值S1，S2，S3，S4的正弦信号的振幅或频率是通过计算差异X1，X2，X3，其中x1是S2和S1之间的差的三线态估计，X 2是S 3和之间的差 S2，且X 3是S4和S3之间的差。 的振幅或频率的估计的指示被计算为的差异X1，X2，X3的代数函数的比率。 幅度被计算为代数函数的第一比值的平方根，并且所述频率被计算为电弧余弦代数函数的第二比率的函数。 因此优选地，该比率是由除法运算计算作为多项式近似，和平方根函数和反余弦函数评估被计算为一个多项式近似。 来自三重态的多个所计算优选比率一起被平均以得到更准确的估计。 优选地，具有一个分母值的任何比率确实具有幅值小于阈值被排除在平均比率的，象平均不会受到任何不准确的结果，可以在由相对小的数除来获得被损坏。 该方法可以被用于补偿的寄生电容，或在电子电路监视的信号的多个健康英寸
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公开(公告)号：EP0037850B1
公开(公告)日：1988-09-07
申请号：EP80105733.2
申请日：1980-09-24
发明人： White, Stanley A.
CPC分类号： G06F7/5235 , G06F1/035 , G06F1/0353 , G06F1/0356 , G06F7/552 , G06F2101/08 , G06F2207/5523
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公开(公告)号：EP0037850A3
公开(公告)日：1984-10-24
申请号：EP80105733
申请日：1980-09-24
发明人： White, Stanley A.
IPC分类号： G06F07/552 , G06F07/52 , G06F01/02
CPC分类号： G06F7/5235 , G06F1/035 , G06F1/0353 , G06F1/0356 , G06F7/552 , G06F2101/08 , G06F2207/5523
摘要： A fully-parallel digital arithmetic device for obtaining the square, C 2 , of a value, C via parts of the value C and involving a reduction in memory requirements. Three square function ROM's are employed, one responsive to the most significant-bits half of a parallel input, the second ROM responsive to the least-significant bits half of the parallel input, and the third one responsive to the sum of said most significant bits and least-significant bits. The outputs of the square function ROM's are then combined and scaled to effect a square by parts of the applied input value, C. A pair of such arithmetic devices may be advantageously combined to economically effect the product AB of two values, A and B, in the manner of a quarter square multiplier.
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