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1. 发明申请

WO2005104377A3 A METHOD AND SYSTEM FOR ANALOG TO DIGITAL CONVERSION USING DIGITAL PULSE WIDTH MODULATION (PWM) 审中-公开
标题翻译：使用数字脉冲宽度调制（PWM）模拟数字转换的方法和系统
公开(公告)号：WO2005104377A3
公开(公告)日：2006-05-18
申请号：PCT/US2005007848
申请日：2005-03-10
申请人： MOTOROLA INC , MIDYA PALLAB , MILLER MATTHEW R , RAKERS PATRICK L
发明人： MIDYA PALLAB , MILLER MATTHEW R , RAKERS PATRICK L
IPC分类号： H03M1/34 , H03M1/12 , H03M1/50 , H03M3/02
CPC分类号： H03M3/00
摘要： A system and method for analog-to-digital conversion (118) using digital pulse width modulation (PWM) is disclosed. The method and system according to the disclosed invention converts an analog input signal (104) to a digital signal in pulse code modulated (PCM) form (106). The disclosed invention uses a feedback circuit (114) 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. 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）的模数转换（118）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（104）转换成脉冲编码调制（PCM）形式（106）的数字信号。所公开的发明使用反馈电路（114）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; 第一个样品是从正确的占空比中获得的。此外，所公开的发明具有比现有技术更小的实现复杂度和更高的信噪比。

2. 发明申请

WO2004062088A3 POWER AMPLIFIER CIRCUIT AND METHOD USING BANDLIMITED SIGNAL COMPONENT ESTIMATES 审中-公开
标题翻译：功率放大器电路和使用带限信号分量估计的方法
公开(公告)号：WO2004062088A3
公开(公告)日：2004-09-23
申请号：PCT/US0338892
申请日：2003-12-05
申请人： MOTOROLA INC
发明人： MIDYA PALLAB , GROSSPIETSCH JOHN , WASHINGTON MICHAEL
IPC分类号： H03F1/02 , H03F3/21 , H03G3/00 , H03F3/38
CPC分类号： H03F3/211 , H03F1/0222 , H03F1/0277 , H03G3/004
摘要： A power amplifier circuit for receiving a variable envelope input signal and for producing an amplified output signal is provided. The power amplifier circuit includes an envelope approximation circuit, an envelope amplifier circuit, a phasor approximation circuit, a quadrature modulation circuit, and a power amplifier. The envelope approximation circuit receives the variable envelope input signal and produces a bandlimited estimated envelope signal, corresponding to the amplitude of the variable envelope input signal. The bandlimited estimated envelope signal is then amplified by an envelope amplifier circuit. The amplified envelope signal is then coupled to the supply input of the power amplifer. The phasor approximation circuit receives the variable envelope input signal and produces a bandlimited estimated phasor signal. The quadrature modulation circuit receives the estimated phase signal and produces a modulated phase signal. The modulated phase signal is then coupled to the signal input of the power amplifier. The power amplifier then produces an amplified output signal.
摘要翻译：提供了用于接收可变包络输入信号和用于产生放大的输出信号的功率放大器电路。功率放大器电路包括包络近似电路，包络放大器电路，相量近似电路，正交调制电路和功率放大器。包络近似电路接收可变包络输入信号并产生对应于可变包络输入信号的振幅的带限估计包络信号。带限估计包络信号然后由包络放大器电路放大。然后放大的包络信号被耦合到功率放大器的电源输入端。相量近似电路接收可变包络输入信号并产生带限估计相量信号。正交调制电路接收估计的相位信号并产生调制的相位信号。然后调制后的相位信号被耦合到功率放大器的信号输入端。功率放大器然后产生放大的输出信号。

3. 发明申请

WO2004062088B1 POWER AMPLIFIER CIRCUIT AND METHOD USING BANDLIMITED SIGNAL COMPONENT ESTIMATES 审中-公开
标题翻译：功率放大器电路和使用带通信号分量估计的方法
公开(公告)号：WO2004062088B1
公开(公告)日：2004-11-18
申请号：PCT/US0338892
申请日：2003-12-05
申请人： MOTOROLA INC
发明人： MIDYA PALLAB , GROSSPIETSCH JOHN , WASHINGTON MICHAEL
IPC分类号： H03F1/02 , H03F3/21 , H03G3/00 , H03F3/38
CPC分类号： H03F3/211 , H03F1/0222 , H03F1/0277 , H03G3/004
摘要： A power amplifier circuit for receiving a variable envelope input signal and for producing an amplified output signal is provided. The power amplifier circuit includes an envelope approximation circuit, an envelope amplifier circuit, a phasor approximation circuit, a quadrature modulation circuit, and a power amplifier. The envelope approximation circuit receives the variable envelope input signal and produces a bandlimited estimated envelope signal, corresponding to the amplitude of the variable envelope input signal. The bandlimited estimated envelope signal is then amplified by an envelope amplifier circuit. The amplified envelope signal is then coupled to the supply input of the power amplifer. The phasor approximation circuit receives the variable envelope input signal and produces a bandlimited estimated phasor signal. The quadrature modulation circuit receives the estimated phase signal and produces a modulated phase signal. The modulated phase signal is then coupled to the signal input of the power amplifier. The power amplifier then produces an amplified output signal.
摘要翻译：提供一种用于接收可变包络输入信号并产生放大的输出信号的功率放大器电路。功率放大器电路包括包络近似电路，包络放大器电路，相量近似电路，正交调制电路和功率放大器。包络近似电路接收可变包络输入信号，并产生对应于可变包络输入信号的幅度的带限估计包络信号。然后，带通估计包络信号由包络放大器电路放大。放大的包络信号然后被耦合到功率放大器的电源输入端。相量近似电路接收可变包络输入信号并产生带限估计的相量信号。正交调制电路接收估计的相位信号并产生调制相位信号。调制相位信号然后被耦合到功率放大器的信号输入。然后，功率放大器产生放大的输出信号。

4. 发明申请

WO2004030223A3 FULL BRIDGE INTEGRAL NOISE SHAPING FOR QUANTIZATION OF PULSE WIDTH MODULATION SIGNALS 审中-公开
标题翻译：用于脉宽调制信号量化的全桥积分噪声整形
公开(公告)号：WO2004030223A3
公开(公告)日：2004-05-27
申请号：PCT/US0327431
申请日：2003-08-22
申请人： MOTOROLA INC
发明人： MIDYA PALLAB , ROECKNER WILLIAM C
IPC分类号： H03F3/217 , H03M1/06 , H03M1/50 , H03M3/04 , H03M7/32 , H03M7/00
CPC分类号： H03M1/0682 , H03F3/2173 , H03F2200/351 , H03M1/504
摘要： Systems and methods are described for full bridge integral noise shaping for quantization of pulse width modulated signals. A method for full bridge integral noise shaping comprises: receiving a first and a second reference PWM signal (401, 402); summing the first and second reference PWM signals with a quantization error correction (504); quantizing the sum into a first and a second output PWM signal (404, 405); differentially integrating the first and second reference PWM signals and the first and second output PWM signals according to a full bridge integral noise shaping algorithm to obtain the quantization error correction. An apparatus for performing a full bridge integralnoise shaping quantization of a pulse modulated signal, includes: a single-ended to differential conversion circuit (203); and a full bridge INS quantizer circuit (403), coupled to the single-ended to differential conversion circuit.
摘要翻译：描述了用于对脉宽调制信号进行量化的全桥整体噪声整形的系统和方法。一种用于全桥积分噪声整形的方法包括：接收第一和第二参考PWM信号（401,402）; 用量化误差校正（504）对第一和第二参考PWM信号进行求和; 将该和量化为第一和第二输出PWM信号（404,405）; 根据全桥积分噪声整形算法对第一和第二参考PWM信号以及第一和第二输出PWM信号进行差分积分以获得量化误差校正。一种用于执行脉冲调制信号的全桥整型噪声整形量化的设备，包括：单端至差分转换电路（203）以及耦合到单端至差分转换电路的全桥INS量化器电路（403）。

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