公开(公告)号：WO2004021569A2

公开(公告)日：2004-03-11

申请号：PCT/US2003/027077

申请日：2003-08-28

Applicant: MOTOROLA, INC.

Inventor： GROSSPIETSCH, John ,  CYGAN, Lawrence

IPC: H03K

CPC classification number: H03F1/0227 ,  H03C5/00

Abstract: To address the need for a power modulator that can efficiently operate within a wideband, high-speed communication system, a method and apparatus for power modulation is provided herein. In accordance with the preferred embodiment of the present invention an envelope reference signal is filtered in such a way that the bandwidth is reduced while keeping the instantaneous level of the filtered signal is greater than the unfiltered envelope level. Because the bandwidth of the envelope signal is reduced, efficient operation of the switching modulator can be achieved within wideband, high-speed communication systems.

Abstract translation: 为了解决对能够在宽带高速通信系统中有效操作的功率调制器的需求，本文提供了用于功率调制的方法和装置。 根据本发明的优选实施例，以保持滤波信号的瞬时电平大于未滤波包络电平的方式使带宽减小的方式对信封参考信号进行滤波。 由于包络信号的带宽减小，所以可以在宽带，高速通信系统内实现切换调制器的有效操作。

公开(公告)号：EP1581994A2

公开(公告)日：2005-10-05

申请号：EP03796778.3

申请日：2003-12-05

Applicant: MOTOROLA, INC.

Inventor： MIDYA, Pallab ,  GROSSPIETSCH, John ,  WASHINGTON, Michael

IPC: H03F3/28

CPC classification number: H03F3/211 ,  H03F1/0222 ,  H03F1/0277 ,  H03G3/004

Abstract: 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.

公开(公告)号：EP0778966A1

公开(公告)日：1997-06-18

申请号：EP96911404.0

申请日：1996-03-26

Applicant: MOTOROLA, INC.

Inventor： GROSSPIETSCH, John ,  ST. ANGEL, Lindo

IPC: G05F3

CPC classification number: G05F3/242

Abstract: A low power regenerative feedback device (301) and method automatically increases bias current during positive large-signal slewing, enabling output to change faster. The device includes a voltage transforming unit (302), adaptive regenerative feedback circuitry (304) and an output stage (309). When the device is not in a positive slew, bias currents are unchanged, providing a low standby current. Since regenerative feedback is internal and automatic to the device, current is increased only for the device driving an active column of an LCD panel. Thus, the present invention is power efficient. In addition, the AC response of the device is preserved because the device utilizes a regenerative feedback circuit (304) that does not add appreciable excess phase shift. The device achieves an output that switches readily from positive supply to negative supply.

公开(公告)号：WO1996036911A1

公开(公告)日：1996-11-21

申请号：PCT/US1996004069

申请日：1996-03-26

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  GROSSPIETSCH, John ,  ST. ANGEL, Lindo

IPC: G05F03/02

CPC classification number: G05F3/242

Abstract: A low power regenerative feedback device (301) and method automatically increases bias current during positive large-signal slewing, enabling output to change faster. The device includes a voltage transforming unit (302), adaptive regenerative feedback circuitry (304) and an output stage (309). When the device is not in a positive slew, bias currents are unchanged, providing a low standby current. Since regenerative feedback is internal and automatic to the device, current is increased only for the device driving an active column of an LCD panel. Thus, the present invention is power efficient. In addition, the AC response of the device is preserved because the device utilizes a regenerative feedback circuit (304) that does not add appreciable excess phase shift. The device achieves an output that switches readily from positive supply to negative supply.

Abstract translation: 低功率再生反馈装置（301）和方法在正大信号回转期间自动增加偏置电流，使输出更快地变化。 该装置包括电压变换单元（302），自适应再生反馈电路（304）和输出级（309）。 当器件不是正转时，偏置电流不变，提供低待机电流。 由于再生反馈对于器件是内部自动的，因此只能为驱动LCD面板的有效列的器件提供电流。 因此，本发明是功率效率的。 另外，设备的AC响应被保留，因为该设备利用不增加明显的多余相移的再生反馈电路（304）。 该器件实现了从正电源切换到负电源的输出。

公开(公告)号：WO2004062088A2

公开(公告)日：2004-07-22

申请号：PCT/US2003/038892

申请日：2003-12-05

Applicant: MOTOROLA INC.

Inventor： MIDYA, Pallab ,  GROSSPIETSCH, John ,  WASHINGTON, Michael

IPC: H03F

CPC classification number: H03F3/211 ,  H03F1/0222 ,  H03F1/0277 ,  H03G3/004

Abstract: 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.

Abstract translation: 提供了用于接收可变包络输入信号并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。