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    Dynamic offset cancellation in sigma-delta converter
    3.
    发明授权
    Dynamic offset cancellation in sigma-delta converter 有权
    Σ-Δ转换器中的动态偏移消除

    公开(公告)号：US09385746B1

    公开(公告)日：2016-07-05

    申请号：US14811311

    申请日：2015-07-28

    申请人： Avago Technologies General IP (Singapore) Pte. Ltd.

    发明人： Gek Yong Ng ,  Qian Tao

    IPC分类号： H03M3/00 ,  H04L25/49

    CPC分类号： H03M3/356 ,  H03M3/00 ,  H03M3/35 ,  H04L25/4902

    摘要： A sigma-delta converter, analog-to-digital conversion system, and an Integrated Circuit (IC) chip are disclosed that include a main sigma-delta modulator and an auxiliary sigma-delta modulator. The auxiliary sigma-delta modulator is electrically matched with the main sigma-delta modulator and is configured to generate an output that is incorporated into a feedback loop of the main sigma-delta modulator to enable the main sigma-delta modulator to adjust an offset signal applied at a main analog channel.

    摘要翻译： 公开了包括主Σ-Δ调制器和辅助Σ-Δ调制器的Σ-Δ转换器，模数转换系统和集成电路（IC）芯片。 辅助Σ-Δ调制器与主Σ-Δ调制器电气匹配，并且被配置为产生并入主要Σ-Δ调制器的反馈环路中的输出，以使得主Σ-Δ调制器能够调整偏移信号 应用于主模拟通道。

    PHASE-BASED ANALOG-TO-DIGITAL CONVERSION
    4.
    发明申请
    PHASE-BASED ANALOG-TO-DIGITAL CONVERSION 有权
    基于相位的模拟到数字转换

    公开(公告)号：US20130342377A1

    公开(公告)日：2013-12-26

    申请号：US13922927

    申请日：2013-06-20

    申请人： The Ohio State University

    发明人： Yiqiao Lin ,  Mohammed Ismail El-nagger

    IPC分类号： H03M1/12 ,  H03M3/00

    CPC分类号： H03M1/12 ,  H03M1/48 ,  H03M1/64 ,  H03M1/665 ,  H03M3/00 ,  H03M3/424 ,  H03M3/43 ,  H03M3/458

    摘要： One embodiment includes a phase-based analog-to-digital converter (ADC) system. The system includes a voltage-to-phase converter configured to convert an input voltage to a phase difference corresponding to a phase-delay with respect to an input clock signal that is based on a magnitude of the input voltage. The system also includes a phase-to-digital converter configured to convert the phase difference into a digital output signal having a digital value corresponding to a magnitude of the phase difference.

    摘要翻译： 一个实施例包括基于相位的模数转换器（ADC）系统。 该系统包括电压相变转换器，其被配置为将输入电压转换为相对于基于输入电压的幅度的输入时钟信号的相位延迟的相位差。 该系统还包括配置成将相位差转换成具有对应于相位差大小的数字值的数字输出信号的相数转换器。

    Global loop integrating modulator
    5.
    发明授权
    Global loop integrating modulator 有权
    全球环路积分调制器

    公开(公告)号：US07365598B2

    公开(公告)日：2008-04-29

    申请号：US10556210

    申请日：2004-05-06

    申请人： Søren Poulsen

    发明人： Søren Poulsen

    IPC分类号： H03F3/38

    CPC分类号： H03F1/32 ,  H03F3/217 ,  H03F2200/372 ,  H03M3/00

    摘要： A switch-mode modulator operating at a two-level voltage and including an alternating output stage (3), an optional output filter (5) and a feedback including a function block (14) with a transfer function (MFB). The modulator furthermore includes a forward block (12) provided with means for calculating the difference between the signal (14a) originating from the function block (14) and a reference signal (REF) as well as with a transfer function (MFW). The output (13) of the forward block (12) is the input of a Schmitt-trigger (9), which generates switch on signals (2) for changing the output stage. The output voltage (VOUT) of the modulator applying either after the optional output filter (5) or the output stage (3) is fed back through the function block (14) so as to generate the signal (14a) fed back. The transfer function of the function block (14) and of the forward block (12) is chosen both in response to the transfer function of the output filter (5) and in response to the desired total open-loop-transfer function of the modulator.

    摘要翻译： 一种以两电平电压工作并包括交替输出级（3），可选输出滤波器（5）和包括具有传输功能（MFB）的功能块（14）的反馈）的开关模式调制器。 调制器还包括具有用于计算源自功能块（14）的信号（14a）和参考信号（REF）以及传递函数（MFW）之间的差异的装置的前向块（12）。 前向块（12）的输出（13）是施密特触发器（9）的输入，其产生用于改变输出级的开启信号（2）。 在可选输出滤波器（5）或输出级（3）之后施加的调制器的输出电压（V OUT OUT）通过功能块（14）反馈，以产生信号 （14 a）反馈。 响应于输出滤波器（5）的传递函数并且响应于调制器的期望的总开环传递函数来选择功能块（14）和正向块（12）的传递函数 。

    Method and apparatus for measuring a low power signal
    6.
    再颁专利
    Method and apparatus for measuring a low power signal 有权
    用于测量低功率信号的方法和装置

    公开(公告)号：USRE39527E1

    公开(公告)日：2007-03-27

    申请号：US10956015

    申请日：2004-09-30

    申请人： Volker Brombacher ,  Fritz Bek

    发明人： Volker Brombacher ,  Fritz Bek

    IPC分类号： H01J40/14 ,  H03F3/08

    CPC分类号： H03M3/00 ,  G01J1/46

    摘要： Low intensity light is incident upon a photodiode whose output is coupled to an integrator. The output of the integrator is coupled to an input of an A/D converter, whose output is coupled to a microprocessor, whose output is coupled to a filter. A second output of the microprocessor is coupled to a gate electrode of a FET to provide a reset signal to the FET to reset the integrator. The microprocessor compares the digital samples of the integrated signal from the A/D converter and, firstly, generates the reset signal if a sample is beyond a set limit, and, secondly, calculates delta values between adjacent samples and interpolates the delta values for the reset periods so as to provide a continuous data stream which can be filtered by a filter matched to the form of the original signal.

    摘要翻译： 低强度光入射到其输出耦合到积分器的光电二极管上。 积分器的输出耦合到A / D转换器的输入，其输出耦合到微处理器，其输出耦合到滤波器。 微处理器的第二输出耦合到FET的栅电极，以向FET提供复位信号以复位积分器。 微处理器将来自A / D转换器的积分信号的数字样本进行比较，首先如果样本超出设定极限，则产生复位信号，其次，计算相邻样本之间的增量值，并对 复位周期，以便提供连续的数据流，该数据流可以由与原始信号的形式匹配的滤波器进行滤波。

    METHOD AND SYSTEM FOR ANALOG TO DIGITAL CONVERSION USING DIGITAL PULSE WIDTH MODULATION (PWM)
    7.
    发明申请
    METHOD AND SYSTEM FOR ANALOG TO DIGITAL CONVERSION USING DIGITAL PULSE WIDTH MODULATION (PWM) 有权
    使用数字脉冲宽度调制（PWM）对模拟转换进行数字转换的方法和系统

    公开(公告)号：US20050225467A1

    公开(公告)日：2005-10-13

    申请号：US10819644

    申请日：2004-04-07

    申请人： Pallab Midya ,  Matthew Miller ,  Patrick Rakers

    发明人： Pallab Midya ,  Matthew Miller ,  Patrick Rakers

    IPC分类号： H03M1/12 ,  H03M1/34 ,  H03M3/02

    CPC分类号： H03M3/00

    摘要： A system and method for analog-to-digital conversion using digital pulse width modulation (PWM) is disclosed. The method and system according to the disclosed invention converts an analog input signal to a digital signal in pulse code modulated (PCM) form. The disclosed invention uses a feedback circuit to perform PWM of the analog input signal. The PWM signal is then decimated to obtain the digital signal in PCM form. The system according to the disclosed invention requires lower operating frequency and dissipates lesser power than prior art systems providing the same sampling frequency and resolution. The operation at a lower frequency is achieved by obtaining two samples from every pulse of the PWM signal; the first sample being obtained from the right duty ratio, and the second sample being obtained form the left duty ratio. Further, the disclosed invention has lesser implementation complexity and higher signal-to-noise ratio than prior art.

    摘要翻译： 公开了一种使用数字脉宽调制（PWM）进行模数转换的系统和方法。 根据所公开的发明的方法和系统将模拟输入信号转换成脉冲编码调制（PCM）形式的数字信号。 所公开的发明使用反馈电路来执行模拟输入信号的PWM。 然后抽取PWM信号以获得PCM形式的数字信号。 根据所公开的发明的系统需要更低的工作频率并且消耗比提供相同采样频率和分辨率的现有技术系统更小的功率。 通过从PWM信号的每个脉冲获得两个采样来实现较低频率的操作; 从正确的占空比获得第一个样品，并且从左占空比获得第二个样品。 此外，所公开的发明比现有技术具有较小的实现复杂度和更高的信噪比。

    System for processing slope and duration information contained in complex waveforms
    8.
    发明授权
    System for processing slope and duration information contained in complex waveforms 失效
    用于处理在复杂波形中包含的斜率和时间信息的系统

    公开(公告)号：US3749834A

    公开(公告)日：1973-07-31

    申请号：US3749834D

    申请日：1971-05-11

    申请人： MARCONI CO LTD

    发明人： BRIAN A ,  ELLIS E

    IPC分类号： H03M1/12 ,  H03M3/04 ,  H04L7/00 ,  H04L27/00

    CPC分类号： H03M3/00

    摘要： A transmission system for transmitting information contained in a complex waveform includes a transmitter in which the individual slopes forming the complex wave and the duration of these slopes are determined and converted into coded signals. These signals are transmitted to a receiver in which the coded signals are used to produce an analogue signal corresponding to the complex wave.

    摘要翻译： 用于发送包含在复数波形中的信息的传输系统包括发送器，其中形成复数波形的各个斜率和这些斜率的持续时间被确定并转换成编码信号。 这些信号被发送到接收机，其中编码信号用于产生对应于复波的模拟信号。