公开(公告)号：US07230467B1

公开(公告)日：2007-06-12

申请号：US11089145

申请日：2005-03-24

Applicant: Jianhua Gan ,  Jhonny Wong

Inventor： Jianhua Gan ,  Jhonny Wong

IPC: H03H11/26

CPC classification number: H03H11/26 ,  H03K5/13 ,  H03K2005/00071

Abstract: A circuit for generating stable signal edges includes an output driver circuit having a current path for varying a charge on a capacitor in response to an input signal and constant current generation circuitry for maintaining a constant current through the current path of the output driver circuit and varying the charge on the capacitor to produce an output signal with a stable edge.

Abstract translation: 用于产生稳定信号边缘的电路包括输出驱动器电路，其具有用于响应于输入信号改变电容器上的电荷的电流路径和用于维持恒定电流通过输出驱动器电路的电流路径的恒定电流产生电路，并且改变 电容上的电荷产生稳定边沿的输出信号。

公开(公告)号：US07199744B1

公开(公告)日：2007-04-03

申请号：US11258668

申请日：2005-10-26

Applicant: John Laurence Melanson

Inventor： John Laurence Melanson

IPC: H03M1/82

CPC classification number: H03F1/26 ,  H03F3/2173 ,  H03F2200/294 ,  H03F2200/331 ,  H03F2200/351 ,  H03F2200/372 ,  H04B15/04 ,  H04B2215/065 ,  H04B2215/069

Abstract: A method of generating a pulse width modulated data stream includes providing a first clock signal having a first frequency and selecting a divisor from a set of divisors for dividing the first frequency to select a pattern rate of a pulse width modulated data stream and thereby shift in frequency noise generated at the pattern rate during pulse width modulation. The first frequency of the first signal is divided to generate a second signal at the selected pattern rate. Noise shaping and requantizing is performed on the second signal to generate a noise shaped and requantized second signal and the pulse width modulated data stream having patterns at the selected pattern rate is generated in response to the first signal and the noise shaped and requantized second signal.

Abstract translation: 一种产生脉宽调制数据流的方法包括：提供具有第一频率的第一时钟信号，并从一组除数中选择除数，以分频第一频率以选择脉宽调制数据流的模式速率， 在脉冲宽度调制期间以图案速率产生的频率噪声。 第一信号的第一频率被分割以产生所选择的模式速率的第二信号。 对第二信号执行噪声整形和再量化以产生噪声形状和再量化的第二信号，并且响应于第一信号和噪声形状和再量化的第二信号产生具有所选模式速率的模式的脉宽调制数据流。

公开(公告)号：US07196647B2

公开(公告)日：2007-03-27

申请号：US10900877

申请日：2004-07-28

Applicant: John L. Melanson

Inventor： John L. Melanson

IPC: H03M3/00

CPC classification number: H03M7/3011 ,  H03M7/3026

Abstract: A signal processing system includes a look-ahead delta-sigma modulator that processes multiple output candidate vectors and an input vector to determine a quantization error vector for each output candidate vector. In one embodiment, the quantization error vector represents a difference between a cost value vector and an input candidate vector. Look-ahead delta-sigma modulator output values are selected using the quantization error vectors by, for example, determining the minimum power quantization error vector for each input vector X and selecting the output value from the input candidate vector associated with the minimum power quantization error vector. Quantization error vectors can also be weighted using a non-uniform weighting vector.

Abstract translation: 信号处理系统包括处理多输出候选向量的前瞻delta-sigma调制器和输入向量，以确定每个输出候选向量的量化误差向量。 在一个实施例中，量化误差矢量表示成本值矢量和输入候选矢量之间的差。 通过例如确定每个输入矢量X的最小功率量化误差矢量并且从与最小功率量化误差相关联的输入候选矢量中选择输出值，使用量化误差向量来选择前视Δ-Σ调制器输出值 向量。 量化误差向量也可以使用不均匀加权矢量进行加权。

公开(公告)号：US07194036B1

公开(公告)日：2007-03-20

申请号：US10397540

申请日：2003-03-26

Applicant: John Laurence Melanson

Inventor： John Laurence Melanson

IPC: H04B14/06 ,  H03M3/02

CPC classification number: H03M7/304 ,  H03M7/3026 ,  H03M7/3028

Abstract: A method of processing a digital data stream in a digital processing system includes filtering the digital data stream being processed through a delta-sigma modulator having a selected signal transfer function passing a frequency band of interest.

Abstract translation: 一种在数字处理系统中处理数字数据流的方法包括：通过具有通过感兴趣频带的选定信号传递函数的Δ-Σ调制器对正在处理的数字数据流进行滤波。

公开(公告)号：US07190197B1

公开(公告)日：2007-03-13

申请号：US10949970

申请日：2004-09-24

Applicant: Zhong You ,  Trenton John Grale

Inventor： Zhong You ,  Trenton John Grale

IPC: H03L7/00

CPC classification number: H03M1/0827 ,  G11C27/02 ,  H03M1/1245 ,  H03M3/368 ,  H03M3/458

Abstract: Clock signal control circuitry including a selector for selecting between a first clock signal and an inverse of the first clock signal and a phase detector for determining a phase relationship between the first clock signal and the second clock signal and in response causing the selector to select between the first clock signal and the inverse of the first clock signal.

Abstract translation: 时钟信号控制电路包括用于在第一时钟信号和第一时钟信号的反相之间进行选择的选择器和用于确定第一时钟信号和第二时钟信号之间的相位关系的相位检测器，并且响应于使选择器在 第一时钟信号和第一时钟信号的反相。

公开(公告)号：US07173550B1

公开(公告)日：2007-02-06

申请号：US10912627

申请日：2004-08-05

Applicant: John Laurence Melanson ,  Jason Powell Rhode

Inventor： John Laurence Melanson ,  Jason Powell Rhode

IPC: H03M3/00

CPC classification number: H03M7/304 ,  G11B20/10527 ,  H03G3/002 ,  H03M7/3026

Abstract: A method of amplitude control in a 1-bit digital system includes the step of scaling the stream of 1-bit data by a scaling factor corresponding to a selected output amplitude. The scaled data is modulated and the resulting modulated, scaled data is converted from digital to analog form.

Abstract translation: 1位数字系统中的幅度控制方法包括按照与所选择的输出振幅对应的比例因子来缩放1比特数据流的步骤。 经缩放的数据被调制，并且所得到的调制的，缩放的数据从数字模式转换成模拟形式。

公开(公告)号：US07162029B2

公开(公告)日：2007-01-09

申请号：US10447606

申请日：2003-05-29

Applicant: Manoj Soman ,  Krishnan Subramoniam ,  Hua Hong ,  Rajendra Datar ,  John Laurence Melanson

Inventor： Manoj Soman ,  Krishnan Subramoniam ,  Hua Hong ,  Rajendra Datar ,  John Laurence Melanson

IPC: H04M1/00 ,  H04M9/00

CPC classification number: H03M1/68 ,  H03M1/785

Abstract: A gain or input volume controller and method includes a modified R2R ladder network having a number of R2R branches, switches coupled respectively to the R2R branches, and a switch controller for respectively controlling the switches to control and provide an overall gain value for a signal. The switch controller further includes a mapper for mapping a gain control signal to the switches wherein the gain control signal respectively activates or deactivates the switches. A fine gain control stage provides a fine gain control of the overall gain value. A coarse gain control stage is coupled to the fine gain control stage. The coarse gain control stage includes the modified R2R ladder network and provides a coarse gain control of the overall gain value.

Abstract translation: 增益或输入音量控制器和方法包括具有多个R2R分支，分别耦合到R2R分支的开关的修改的R2R梯形网络和用于分别控制开关以控制并提供信号的总增益值的开关控制器。 开关控制器还包括用于将增益控制信号映射到开关的映射器，其中增益控制信号分别激活或去激活开关。 精细增益控制级提供整体增益值的精细增益控制。 粗调增益控制级耦合到微增益控制级。 粗增益控制级包括经修改的R2R梯形网络，并提供总增益值的粗增益控制。

公开(公告)号：US07161229B2

公开(公告)日：2007-01-09

申请号：US11070464

申请日：2005-03-02

Applicant: Jhonny A. Wong ,  Gexin Huang ,  G. Patrick Muyshondt

Inventor： Jhonny A. Wong ,  Gexin Huang ,  G. Patrick Muyshondt

IPC: H01L27/02

CPC classification number: H03M11/24 ,  H01L27/0802 ,  H01L28/20 ,  H03H7/24

Abstract: A programmable resistor includes a variety of taps. Selection of any of a variety of tap combinations establishes a path through which current will flow, thus, setting the resistance value of the programmable resistor. The programmable resistor minimizes the effects of parasitic end boundary resistances, Rend/w, between contacts and resistive areas by limiting the contribution of the end boundary resistances to 2Rend/w, regardless of the programmed tap combination. By fabricating a contiguous region of impedance material, only the Rend/w end boundary resistances associated with selected taps affect the value of the programmed resistance. A notched tap structure provides predictability of the resistance value of each tap combination. Taps are narrowed to form a notch which establishes a well-defined current flow path, thus providing the resistance predictability. Additionally, notches also allow for a wider contact-resistive area end boundary, thus, further minimizing the parasitic effect of Rend.

Abstract translation: 可编程电阻器包括各种抽头。 选择各种分接组合中的任意一种可建立电流流过的路径，从而设定可编程电阻器的电阻值。 可编程电阻器通过限制端部边界电阻对2R端子/ W的贡献来最小化触点和电阻区域之间的寄生端边界电阻R OUT端子/ ，无论编程的分接组合如何。 通过制造阻抗材料的连续区域，只有与所选择的抽头相关联的R end端电阻才会影响编程电阻的值。 凹口抽头结构提供每个抽头组合的电阻值的可预测性。 水龙头变窄以形成一个缺口，其建立了明确定义的电流流动路径，从而提供阻力可预测性。 此外，凹口还允许更宽的接触电阻区域边界，从而进一步最小化R端子的寄生效应。

公开(公告)号：US07154562B1

公开(公告)日：2006-12-26

申请号：US10685128

申请日：2003-10-14

Applicant: Ahsan Chowdhury ,  Anand Venkitachalam ,  John Melanson

Inventor： Ahsan Chowdhury ,  Anand Venkitachalam ,  John Melanson

IPC: H04N5/202 ,  H04N9/69

CPC classification number: H04N5/202

Abstract: A method of gamma correction includes selecting lower and upper reference curves corresponding to selected reference gamma values. A gamma correction curve is generated from a corresponding gamma correction value and cross-correlated with the upper and lower reference curves to generate a corresponding set of cross-correlation factors. The set of cross-correlation factors are stored and indexed to the corresponding gamma value. An input value is received for gamma correction with the corresponding gamma value. Data from the upper and lower reference curves indexed by the input value are then operated one with the cross-correlation factors to generate a gamma corrected output value.

Abstract translation: 伽马校正的方法包括选择对应于所选参考伽马值的下参考曲线和上参考曲线。 从相应的伽马校正值产生伽马校正曲线，并与上参考曲线和下参考曲线交叉相关，以产生相应的一组互相关因子。 互相关因子的集合被存储并被索引到相应的伽马值。 接收用于具有相应伽马值的伽马校正的输入值。 然后，通过输入值索引的来自上下参考曲线的数据与互相关因子一起运算，以产生伽马校正输出值。

公开(公告)号：US07148830B2

公开(公告)日：2006-12-12

申请号：US11043719

申请日：2005-01-26

Applicant: John L. Melanson

Inventor： John L. Melanson

IPC: H03M3/00

CPC classification number: H03M7/3011 ,  H03M3/366 ,  H03M3/458

Abstract: A look-ahead delta sigma modulator utilizes pruning techniques to reduce the number of possible output candidate vectors used to determine quantization output values. The look-ahead delta-sigma modulators can also combine the pruning techniques with a reduction in the amount of processing by simplifying the computations used to generate quantizer output values. In one embodiment, the pruning techniques exploit application of superposition techniques to a loop filter response of the look-ahead delta sigma modulator. The set of possible pattern response vectors can be pruned to form a subset of P candidate pattern response vectors. If an element value of a pattern response vector proximally matches a value of the corresponding reference element of the natural response vector, a quantizer uses the proximally matching pattern response vector to determine a quantization output value.

Abstract translation: 先行ΔΣ调制器利用修剪技术来减少用于确定量化输出值的可能输出候选矢量的数量。 先行的delta-sigma调制器还可以通过简化用于生成量化器输出值的计算来将修剪技术与减少处理量相结合。 在一个实施例中，修剪技术利用叠加技术对前瞻delta-Σ调制器的环路滤波器响应的应用。 可以修剪可能的模式响应向量的集合以形成P个候选模式响应向量的子集。 如果模式响应向量的元素值近似地匹配自然响应向量的对应参考元素的值，则量化器使用近似匹配模式响应向量来确定量化输出值。