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公开(公告)号：US20130235923A1
公开(公告)日：2013-09-12
申请号：US13417000
申请日：2012-03-09
CPC分类号： H03K7/08 , H04L25/4902
摘要： A pulse-width modulator (PWM) includes a plurality of comparators for comparing an input signal with a plurality of reference signals and for providing a plurality of corresponding comparison signals. The pulse-width modulator also includes a combinational logic for receiving the plurality of comparison signals and for generating a plurality of binary pulse-width modulation signals on the basis of the plurality of comparison signals. At most only a currently selected binary pulse-width modulation signal of the binary pulse-width modulation signals is at a first signal level at a time. The currently selected binary pulse-width modulation signal is associated to a specific reference signal of the plurality of reference signals which is currently closest to the input signal among the plurality of reference signals in terms of a given amplitude relation between the plurality of reference signals and the input signal.
摘要翻译： 脉冲宽度调制器（PWM）包括多个比较器，用于将输入信号与多个参考信号进行比较，并用于提供多个对应的比较信号。 脉冲宽度调制器还包括用于接收多个比较信号的组合逻辑，并且用于基于多个比较信号产生多个二进制脉冲宽度调制信号。 二进制脉冲宽度调制信号中最多只有当前选择的二进制脉宽调制信号一次处于第一信号电平。 当前选择的二进制脉冲宽度调制信号与多个参考信号中当前最接近多个参考信号中的输入信号的特定参考信号相关联，就多个参考信号和 输入信号。
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公开(公告)号：US08767814B2
公开(公告)日：2014-07-01
申请号：US13417000
申请日：2012-03-09
IPC分类号： H03K7/08
CPC分类号： H03K7/08 , H04L25/4902
摘要： A pulse-width modulator (PWM) includes a plurality of comparators for comparing an input signal with a plurality of reference signals and for providing a plurality of corresponding comparison signals. The pulse-width modulator also includes a combinational logic for receiving the plurality of comparison signals and for generating a plurality of binary pulse-width modulation signals on the basis of the plurality of comparison signals. At most only a currently selected binary pulse-width modulation signal of the binary pulse-width modulation signals is at a first signal level at a time. The currently selected binary pulse-width modulation signal is associated to a specific reference signal of the plurality of reference signals which is currently closest to the input signal among the plurality of reference signals in terms of a given amplitude relation between the plurality of reference signals and the input signal.
摘要翻译： 脉冲宽度调制器（PWM）包括多个比较器，用于将输入信号与多个参考信号进行比较，并用于提供多个对应的比较信号。 脉冲宽度调制器还包括用于接收多个比较信号的组合逻辑，并且用于基于多个比较信号产生多个二进制脉冲宽度调制信号。 二进制脉冲宽度调制信号中最多只有当前选择的二进制脉宽调制信号一次处于第一信号电平。 当前选择的二进制脉冲宽度调制信号与多个参考信号中当前最接近多个参考信号中的输入信号的特定参考信号相关联，就多个参考信号和 输入信号。
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3.发明授权System and method for generating a radio frequency pulse-width modulated signal 有权用于产生射频脉宽调制信号的系统和方法公开(公告)号：US08971398B2
公开(公告)日：2015-03-03
申请号：US13236385
申请日：2011-09-19
CPC分类号： H03F3/2178 , H03F1/0277 , H03F3/602
摘要： In an embodiment, a method of producing a multi-level RF signal includes producing plurality of pulse-width modulated signals based on an input signal. The method further includes driving a corresponding plurality of parallel amplifiers with the plurality of pulse-width modulated signals by setting a parallel amplifier to have a first output impedance when a corresponding pulse-width modulated signal is in an active state and setting the parallel amplifier to have a second output impedance when the corresponding pulse-width is in an inactive state. The method also includes phase shifting the outputs of the plurality of parallel amplifiers, wherein phase shifting transforms the second output impedance into a third impedance that is higher than the second output impedance, and combining the phase shifted outputs.
摘要翻译： 在一个实施例中，产生多电平RF信号的方法包括基于输入信号产生多个脉冲宽度调制信号。 该方法还包括通过将并行放大器设置为具有第一输出阻抗来驱动具有多个脉冲宽度调制信号的相应多个并行放大器，当相应的脉宽调制信号处于活动状态并将并行放大器设置为 当相应的脉冲宽度处于非活动状态时，具有第二输出阻抗。 该方法还包括相移多个并行放大器的输出，其中相移将第二输出阻抗转换成高于第二输出阻抗的第三阻抗，并组合相移输出。
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公开(公告)号：US20140002192A1
公开(公告)日：2014-01-02
申请号：US13538309
申请日：2012-06-29
CPC分类号： H03F1/0277 , H03F1/223 , H03F1/56 , H03F3/211 , H03F2200/09 , H03F2200/105 , H03F2200/171 , H03F2200/222 , H03F2200/387 , H03F2200/391 , H03F2200/465 , H03F2200/78 , H03F2203/21142
摘要： In accordance with an embodiment, a system includes a first transistor and a second transistor. The first transistor has a first input node coupled to a first signal input, a first output node coupled to a first common node, and a first reference node coupled to a first reference voltage, and the second transistor has a second input node coupled to second signal input, a second output node coupled to an output of the system, and a second reference node coupled to the first common node. The system further includes a first switch switchably coupling the first common node to a second reference voltage.
摘要翻译： 根据实施例，系统包括第一晶体管和第二晶体管。 第一晶体管具有耦合到第一信号输入的第一输入节点，耦合到第一公共节点的第一输出节点和耦合到第一参考电压的第一参考节点，而第二晶体管具有耦合到第二输入节点的第二输入节点 信号输入，耦合到所述系统的输出的第二输出节点以及耦合到所述第一公共节点的第二参考节点。 该系统还包括可切换地将第一公共节点耦合到第二参考电压的第一开关。
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公开(公告)号：US08970295B2
公开(公告)日：2015-03-03
申请号：US13603313
申请日：2012-09-04
CPC分类号： H03F3/217 , H03F1/0205 , H03F3/2171 , H03F3/2176 , H03F3/245
摘要： In accordance with an embodiment, a system includes a first amplifier and a first bandpass filter having an input coupled in series with an output of the first amplifier, and an output configured to be coupled to a load. The bandpass filter has a lower input impedance at an in-band center frequency than at out-of-band frequencies, and the first amplifier is configured to receive a pulse width modulated waveform filtered according to a first transfer function that attenuates sidebands of the pulse width modulated waveform.
摘要翻译： 根据实施例，系统包括第一放大器和第一带通滤波器，其具有与第一放大器的输出串联耦合的输入，以及被配置为耦合到负载的输出。 带通滤波器在带内中心频率处具有比在带外频率下更低的输入阻抗，并且第一放大器被配置为接收根据第一传递函数滤波的脉宽调制波形，该第一传递函数衰减脉冲的边带 宽调制波形。
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公开(公告)号：US20140062604A1
公开(公告)日：2014-03-06
申请号：US13603313
申请日：2012-09-04
CPC分类号： H03F3/217 , H03F1/0205 , H03F3/2171 , H03F3/2176 , H03F3/245
摘要： In accordance with an embodiment, a system includes a first amplifier and a first bandpass filter having an input coupled in series with an output of the first amplifier, and an output configured to be coupled to a load. The bandpass filter has a lower input impedance at an in-band center frequency than at out-of-band frequencies, and the first amplifier is configured to receive a pulse width modulated waveform filtered according to a first transfer function that attenuates sidebands of the pulse width modulated waveform.
摘要翻译： 根据实施例，系统包括第一放大器和第一带通滤波器，其具有与第一放大器的输出串联耦合的输入，以及被配置为耦合到负载的输出。 带通滤波器在带内中心频率处具有比在带外频率下更低的输入阻抗，并且第一放大器被配置为接收根据第一传递函数滤波的脉宽调制波形，该第一传递函数衰减脉冲的边带 宽调制波形。
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公开(公告)号：US08754712B2
公开(公告)日：2014-06-17
申请号：US13538309
申请日：2012-06-29
IPC分类号： H03F1/22
CPC分类号： H03F1/0277 , H03F1/223 , H03F1/56 , H03F3/211 , H03F2200/09 , H03F2200/105 , H03F2200/171 , H03F2200/222 , H03F2200/387 , H03F2200/391 , H03F2200/465 , H03F2200/78 , H03F2203/21142
摘要： In accordance with an embodiment, a system includes a first transistor and a second transistor. The first transistor has a first input node coupled to a first signal input, a first output node coupled to a first common node, and a first reference node coupled to a first reference voltage, and the second transistor has a second input node coupled to second signal input, a second output node coupled to an output of the system, and a second reference node coupled to the first common node. The system further includes a first switch switchably coupling the first common node to a second reference voltage.
摘要翻译： 根据实施例，系统包括第一晶体管和第二晶体管。 第一晶体管具有耦合到第一信号输入的第一输入节点，耦合到第一公共节点的第一输出节点和耦合到第一参考电压的第一参考节点，而第二晶体管具有耦合到第二输入节点的第二输入节点 信号输入，耦合到所述系统的输出的第二输出节点以及耦合到所述第一公共节点的第二参考节点。 该系统还包括可切换地将第一公共节点耦合到第二参考电压的第一开关。
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8.发明申请System and Method for Generating a Radio Frequency Pulse-width Modulated Signal 有权用于产生射频脉宽调制信号的系统和方法公开(公告)号：US20130070836A1
公开(公告)日：2013-03-21
申请号：US13236385
申请日：2011-09-19
CPC分类号： H03F3/2178 , H03F1/0277 , H03F3/602
摘要： In an embodiment, a method of producing a multi-level RF signal includes producing plurality of pulse-width modulated signals based on an input signal. The method further includes driving a corresponding plurality of parallel amplifiers with the plurality of pulse-width modulated signals by setting a parallel amplifier to have a first output impedance when a corresponding pulse-width modulated signal is in an active state and setting the parallel amplifier to have a second output impedance when the corresponding pulse-width is in an inactive state. The method also includes phase shifting the outputs of the plurality of parallel amplifiers, wherein phase shifting transforms the second output impedance into a third impedance that is higher than the second output impedance, and combining the phase shifted outputs.
摘要翻译： 在一个实施例中，产生多电平RF信号的方法包括基于输入信号产生多个脉冲宽度调制信号。 该方法还包括通过将并行放大器设置为具有第一输出阻抗来驱动具有多个脉冲宽度调制信号的相应多个并行放大器，当对应的脉宽调制信号处于活动状态并将并行放大器设置为 当相应的脉冲宽度处于非活动状态时，具有第二输出阻抗。 该方法还包括相移多个并行放大器的输出，其中相移将第二输出阻抗转换成高于第二输出阻抗的第三阻抗，并组合相移输出。
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