Noise shaping for digital pulse-width modulators
    1.
    发明授权
    Noise shaping for digital pulse-width modulators 有权
    数字脉宽调制器的噪声整形

    公开(公告)号:US09013341B2

    公开(公告)日:2015-04-21

    申请号:US13619034

    申请日:2012-09-14

    IPC分类号: H03M3/00 H03H17/00

    摘要: A circuit including an analog-to-digital converter (ADC). The ADC is configured to receive an analog feedback signal and an analog input signal and generate a digital output. The circuit further includes a noise shaper. The noise shaper is configured to truncate the digital output and generate a noise shaper output having a lower number of bits than the digital output, and to shape quantization noise generated during truncation. The circuit further includes a pulse width modulation digital-to-analog converter (PWM DAC). The PWM DAC configured to process the truncated digital output of the noise shaper output and generate a PWM DAC output.

    摘要翻译: 包括模数转换器(ADC)的电路。 ADC配置为接收模拟反馈信号和模拟输入信号并产生数字输出。 电路还包括噪声整形器。 噪声整形器被配置为截断数字输出并产生具有比数字输出低的位数的噪声整形器输出,并且形成在截断期间产生的量化噪声。 电路还包括脉宽调制数模转换器(PWM DAC)。 PWM DAC被配置为处理噪声整形器输出的截断数字输出并产生PWM DAC输出。

    Noise shaping for digital pulse-width modulators
    2.
    发明授权
    Noise shaping for digital pulse-width modulators 有权
    数字脉宽调制器的噪声整形

    公开(公告)号:US08299946B2

    公开(公告)日:2012-10-30

    申请号:US12959869

    申请日:2010-12-03

    IPC分类号: H03M3/00

    摘要: A noise shaper that compares an input signal to a feedback output signal, which is a truncated version of the input signal, and generates the difference between the two signals (i.e., the error). The noise shaper then integrates the errors by adding to the error multiple of its delayed versions, and quantizes the integrated errors in such a way that the spectrum of the quantization noise is shaped toward high frequencies to be removed by a LC low-pass filter used in conjunction with the noise shaper. The low frequency content of the desired signal is mostly unaffected.

    摘要翻译: 一种噪声整形器,其将输入信号与输入信号的截断形式的反馈输出信号进行比较,并产生两个信号之间的差异(即误差)。 然后,噪声整形器通过加上其延迟版本的误差倍数来积分误差,并且量化积分误差,使得量化噪声的频谱朝向高频成形,以通过LC低通滤波器去除 结合噪音整形器。 所需信号的低频内容大部分不受影响。

    DIGITAL CONTROL OF POWER CONVERTERS
    3.
    发明申请
    DIGITAL CONTROL OF POWER CONVERTERS 有权
    电力转换器的数字控制

    公开(公告)号:US20090237966A1

    公开(公告)日:2009-09-24

    申请号:US12197790

    申请日:2008-08-25

    IPC分类号: H02M3/00

    摘要: A system and method for controlling a power converter is presented. An embodiment comprises an analog differential circuit connected to an analog-to-digital converter, and comparing the digital error signal to at least a first threshold value. If the digital error signal is less than the first threshold value, a pulse is generated to control the power converter. Another embodiment includes multiple thresholds that may be compared against the digital error signal.

    摘要翻译: 提出了一种用于控制功率转换器的系统和方法。 实施例包括连接到模拟 - 数字转换器的模拟差分电路,并将数字误差信号与至少第一阈值进行比较。 如果数字误差信号小于第一阈值,则产生脉冲以控制功率转换器。 另一实施例包括可与数字误差信号进行比较的多个阈值。

    Digital Control of Power Converters
    4.
    发明申请
    Digital Control of Power Converters 审中-公开
    电力转换器数字控制

    公开(公告)号:US20090237959A1

    公开(公告)日:2009-09-24

    申请号:US12134930

    申请日:2008-06-06

    IPC分类号: H02M7/00

    摘要: A system and method for controlling a power converter is presented. An embodiment comprises an analog differential circuit connected to an analog-to-digital converter, a digital pulse generator, and a pre-driver to control the power converter. Another embodiment also includes a digital filter as part of the control loop that may be used to control the loop characteristics of the control circuit. Yet another embodiment replaces the differential circuit with a sigma-delta analog-to-digital modulator and a decimator.

    摘要翻译: 提出了一种用于控制功率转换器的系统和方法。 实施例包括连接到模拟 - 数字转换器的模拟差分电路,数字脉冲发生器和用于控制功率转换器的预驱动器。 另一实施例还包括作为可用于控制控制电路的环路特性的控制环路的一部分的数字滤波器。 另一个实施例用Σ-Δ模数转换器和抽取器代替了差分电路。

    Apparatus for Controlling Slew Rate
    5.
    发明申请
    Apparatus for Controlling Slew Rate 有权
    用于控制压摆率的装置

    公开(公告)号:US20120146716A1

    公开(公告)日:2012-06-14

    申请号:US12964412

    申请日:2010-12-09

    IPC分类号: G05F1/10

    摘要: An apparatus for controlling slew rate is coupled to two adjustable voltage rails. The output of the apparatus is coupled to the gate of a switching element. By employing two adjustable voltage rails, the slew rate of the switching element is proportional to the voltage difference between the first adjustable rail and the second adjustable rail. The slew rate control apparatus can be applied to a variety of switching elements including N channel Field Effect Transistors (NFETs), P channel Field Effect Transistors (PFETs), current mode logic circuits and level shifter circuits.

    摘要翻译: 用于控制转换速率的装置耦合到两个可调电压轨。 该装置的输出耦合到开关元件的栅极。 通过采用两个可调电压轨道,开关元件的转换速率与第一可调节轨道和第二可调节轨道之间的电压差成比例。 压摆率控制装置可以应用于包括N沟道场效应晶体管(NFET),P沟道场效应晶体管(PFET),电流模式逻辑电路和电平移位器电路的各种开关元件。

    Class D Amplifier Control Circuit and Method
    6.
    发明申请
    Class D Amplifier Control Circuit and Method 有权
    D类放大器控制电路及方法

    公开(公告)号:US20110006844A1

    公开(公告)日:2011-01-13

    申请号:US12858310

    申请日:2010-08-17

    IPC分类号: H03F3/217

    CPC分类号: H03F3/2173

    摘要: Circuit and method for a Class D amplifier. In one exemplary embodiment, an audio amplifier is disclosed. A closed loop configuration for driving high and low side driver transistors is provided, each circuit is compatible with advanced sub micron semiconductor processes. The analog time varying input is coupled to one input of a sigma delta analog to digital converter. A feedback signal from the output is also input to the analog to digital converter. A bit stream is output by the analog to digital converter. A decimator receives this bit stream and downconverts the samples to digital values at a lower frequency. A digital filter with adaptable coefficients is used to filter that signal and a digital pulse width modulator then develops an analog differential PWM signal. A predriver inputs the PWM signal and derives the output gating signals to control the high and low side drivers of a Class D amplifier.

    摘要翻译: D类放大器的电路和方法。 在一个示例性实施例中,公开了一种音频放大器。 提供用于驱动高侧和低侧驱动晶体管的闭环配置,每个电路与先进的亚微米半导体工艺兼容。 模拟时变输入耦合到Σ-Δ模数转换器的一个输入端。 来自输出的反馈信号也被输入到模数转换器。 位流由模数转换器输出。 抽取器接收该位流,并以较低的频率将样本下变频为数字值。 使用具有适应系数的数字滤波器来对该信号进行滤波,并且数字脉宽调制器然后开发模拟差分PWM信号。 预驱动器输入PWM信号并导出输出门控信号以控制D类放大器的高侧和低侧驱动器。

    Digital control of power converters
    7.
    发明授权
    Digital control of power converters 有权
    电源转换器的数字控制

    公开(公告)号:US07834604B2

    公开(公告)日:2010-11-16

    申请号:US12197790

    申请日:2008-08-25

    IPC分类号: G05F1/40

    摘要: A system and method for controlling a power converter is presented. An embodiment comprises an analog differential circuit connected to an analog-to-digital converter, and comparing the digital error signal to at least a first threshold value. If the digital error signal is less than the first threshold value, a pulse is generated to control the power converter. Another embodiment includes multiple thresholds that may be compared against the digital error signal.

    摘要翻译: 提出了一种用于控制功率转换器的系统和方法。 实施例包括连接到模拟 - 数字转换器的模拟差分电路,并将数字误差信号与至少第一阈值进行比较。 如果数字误差信号小于第一阈值,则产生脉冲以控制功率转换器。 另一实施例包括可与数字误差信号进行比较的多个阈值。

    Apparatus for controlling slew rate
    8.
    发明授权
    Apparatus for controlling slew rate 有权
    用于控制转换速率的设备

    公开(公告)号:US09236856B2

    公开(公告)日:2016-01-12

    申请号:US12964412

    申请日:2010-12-09

    摘要: An apparatus for controlling slew rate is coupled to two adjustable voltage rails. The output of the apparatus is coupled to the gate of a switching element. By employing two adjustable voltage rails, the slew rate of the switching element is proportional to the voltage difference between the first adjustable rail and the second adjustable rail. The slew rate control apparatus can be applied to a variety of switching elements including N channel Field Effect Transistors (NFETs), P channel Field Effect Transistors (PFETs), current mode logic circuits and level shifter circuits.

    摘要翻译: 用于控制转换速率的装置耦合到两个可调电压轨。 该装置的输出耦合到开关元件的栅极。 通过采用两个可调电压轨道,开关元件的转换速率与第一可调节轨道和第二可调节轨道之间的电压差成比例。 压摆率控制装置可以应用于包括N沟道场效应晶体管(NFET),P沟道场效应晶体管(PFET),电流模式逻辑电路和电平移位器电路的各种开关元件。

    Dynamic control loop for switching regulators
    9.
    发明授权
    Dynamic control loop for switching regulators 有权
    用于开关稳压器的动态控制回路

    公开(公告)号:US08450990B2

    公开(公告)日:2013-05-28

    申请号:US12856918

    申请日:2010-08-16

    IPC分类号: G05F1/575 G05F1/618

    摘要: A method of controlling a regulator includes turning on a first driver during a first cycle for a first time period. A second driver is turned on during the first cycle for a second time period. The first and second drivers are off during the first cycle for a third time period. The first time period is adjusted to become an adjusted first time period for a second cycle based on a ratio and a voltage difference between a peak value of the output voltage and a first voltage during the first cycle. The ratio refers to the first time period over the first time period and the second time period.

    摘要翻译: 一种控制调节器的方法包括在第一周期内第一时间段内打开第一驱动器。 第二个驱动程序在第一个周期内打开第二个时间段。 第一个和第二个驱动程序在第一个周期内关闭了第三个时间段。 基于第一周期期间输出电压的峰值和第一电压之间的比率和电压差,调整第一时间段以变为第二周期的调整后的第一时间段。 该比率是指在第一时间段和第二时间段的第一时间段。

    Digital Control of Power Converters
    10.
    发明申请
    Digital Control of Power Converters 有权
    电力转换器数字控制

    公开(公告)号:US20090237054A1

    公开(公告)日:2009-09-24

    申请号:US12256300

    申请日:2008-10-22

    IPC分类号: G05F1/00

    摘要: A system and method for controlling a power converter is presented. An embodiment comprises an analog differential circuit connected to an analog-to-digital converter, and comparing the digital error signal to at least a first threshold value. If the digital error signal is less than the first threshold value, a pulse is generated to control the power converter. Another embodiment includes multiple thresholds that may be compared against the digital error signal.

    摘要翻译: 提出了一种用于控制功率转换器的系统和方法。 实施例包括连接到模拟 - 数字转换器的模拟差分电路,并将数字误差信号与至少第一阈值进行比较。 如果数字误差信号小于第一阈值,则产生脉冲以控制功率转换器。 另一实施例包括可与数字误差信号进行比较的多个阈值。