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1. 发明授权

US09431973B2 Pulse-width modulation generator 有权
标题翻译：脉宽调制发生器
公开(公告)号：US09431973B2
公开(公告)日：2016-08-30
申请号：US14480161
申请日：2014-09-08
申请人： QUALCOMM TECHNOLOGIES International, Ltd.
发明人： David Chappaz
IPC分类号： H03F3/217 , H03F3/183 , H03K3/017
CPC分类号： H03F3/183 , H03F3/217 , H03F2200/03 , H03K3/017
摘要： The present application relates to a pulse-width modulation generator for generating a pulse-width modulated signal, the PWM generator comprising: a PWM modulator; and a loop filter, wherein the loop filter is configured to receive an input signal and to output a filtered signal to the PWM modulator, and the PWM modulator is configured to receive the filtered signal from the loop filter and to output a pulse-width modulated signal, the PWM generator further comprising: a feedback loop coupling an output of the PWM modulator to an input of the loop filter, wherein the feedback loop includes a comb filter.
摘要翻译：本发明涉及用于产生脉冲宽度调制信号的脉冲宽度调制发生器，所述PWM发生器包括：PWM调制器; 以及环路滤波器，其中所述环路滤波器被配置为接收输入信号并将经滤波的信号输出到所述PWM调制器，并且所述PWM调制器被配置为从所述环路滤波器接收经滤波的信号并输出脉宽调制所述PWM发生器还包括：将所述PWM调制器的输出耦合到所述环路滤波器的输入端的反馈回路，其中所述反馈回路包括梳状滤波器。

2. 发明授权

US09407238B2 Devices and methods for pulse-width modulation 有权
标题翻译：用于脉冲宽度调制的装置和方法
公开(公告)号：US09407238B2
公开(公告)日：2016-08-02
申请号：US14471562
申请日：2014-08-28
申请人： QUALCOMM Technologies International, Ltd.
发明人： David Chappaz
IPC分类号： H03F3/217 , H03H11/04 , H03M1/66 , H03F1/36 , H03K7/08
CPC分类号： H03H11/0405 , H03F1/36 , H03F3/217 , H03F3/2175 , H03K7/08 , H03M1/661
摘要： Devices and methods convert signals into pulse-width modulated signals. A noise-shaping loop can be clocked at a lower frequency than a PWM modulator, resulting in lower power requirements, and greater ease of synchronization. The delay introduced by the noise-shaping loop can be reduced by implementations using sample-and-hold devices, look-up tables and logic circuitry to predict output signals.
摘要翻译：器件和方法将信号转换为脉宽调制信号。噪声整形环路可以以比PWM调制器更低的频率进行时钟输出，从而降低功耗要求，并提高同步容易度。通过使用采样和保持设备，查找表和用于预测输出信号的逻辑电路的实现，可以减少由噪声整形环路引入的延迟。

3. 发明授权

US09362888B2 Devices and methods for converting digital signals 有权
标题翻译：用于转换数字信号的设备和方法
公开(公告)号：US09362888B2
公开(公告)日：2016-06-07
申请号：US14471554
申请日：2014-08-28
申请人： QUALCOMM Technologies International, Ltd.
发明人： David Chappaz
IPC分类号： H03F3/217 , H03F3/45 , H03H11/04 , H03K7/08
CPC分类号： H03H11/0405 , H03F3/217 , H03F3/2175 , H03K7/08 , H03M3/432 , H03M3/506
摘要： A signal converter directly converts pulse-density-modulated (PDM) signals into pulse-width-modulated (PWM) signals. A noise-shaping loop architecture can be configured to apply a signal transfer function having a low-pass filter effect, and a noise transfer function having a high-pass filter effect. Decimation and interpolation can ensure that the noise-shaping loop architecture operates at a first sampling frequency, while the PWM modulator operates at a second, higher sampling frequency.
摘要翻译：信号转换器将脉冲密度调制（PDM）信号直接转换成脉冲宽度调制（PWM）信号。噪声整形环路结构可以被配置为应用具有低通滤波器效应的信号传递函数和具有高通滤波器效应的噪声传递函数。抽取和插值可以确保噪声整形环路架构以第一采样频率工作，而PWM调制器以第二较高的采样频率工作。

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