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    Communications signal amplifiers having independent power control and amplitude modulation
    1.
    发明授权
    Communications signal amplifiers having independent power control and amplitude modulation 失效

    公开(公告)号：US07010276B2

    公开(公告)日：2006-03-07

    申请号：US09834024

    申请日：2001-04-11

    申请人： Wendell B. Sander ,  Ronald A. Meck ,  Earl W. McCune, Jr.

    发明人： Wendell B. Sander ,  Ronald A. Meck ,  Earl W. McCune, Jr.

    IPC分类号： H04B1/02

    CPC分类号： H03F1/0211 ,  H03G3/004 ,  H03G3/3042

    摘要： The present invention, generally speaking, provides methods and apparatus for producing an amplitude modulated communications signal, in which a constant-envelope carrier signal is modified in response to a power control signal to produce a modified constant-envelope carrier signal. The modified constant-envelope carrier signal is amplified in response to an amplitude modulation signal to produce a communications signal having amplitude modulation and having an average output power proportional to a signal level of the modified constant-envelope carrier signal. This manner of operation allows wide dynamic range of average output power to be achieved. Because amplitude modulation is applied after amplitude varying circuitry used to produce the modified constant-envelope carrier signal, the amplitude modulation is unaffected by possible non-linearities of such circuitry. In accordance with another aspect of the invention, operation in the foregoing manner at comparatively low average output power levels is combined with switch mode operation at comparatively high average output power levels, enabling high overall efficiency to be achieved. Hence, the disclosed modulator and amplifier combination, in addition to supporting very low power signals, also supports high power signals.

    Communications signal amplifiers having independent power control and amplitude modulation
    2.
    发明授权
    Communications signal amplifiers having independent power control and amplitude modulation 有权

    公开(公告)号：US07515885B2

    公开(公告)日：2009-04-07

    申请号：US11208327

    申请日：2005-08-19

    申请人： Wendell B. Sander ,  Ronald A. Meck ,  Earl W. McCune, Jr.

    发明人： Wendell B. Sander ,  Ronald A. Meck ,  Earl W. McCune, Jr.

    IPC分类号： H01Q11/12 ,  H04B1/00

    CPC分类号： H03F1/0211 ,  H03G3/004 ,  H03G3/3042

    摘要： The present invention, generally speaking, provides methods and apparatus for producing an amplitude modulated communications signal, in which a constant-envelope carrier signal is modified in response to a power control signal to produce a modified constant-envelope carrier signal. The modified constant-envelope carrier signal is amplified in response to an amplitude modulation signal to produce a communications signal having amplitude modulation and having an average output power proportional to a signal level of the modified constant-envelope carrier signal. This manner of operation allows wide dynamic range of average output power to be achieved. Because amplitude modulation is applied after amplitude varying circuitry used to produce the modified constant-envelope carrier signal, the amplitude modulation is unaffected by possible non-linearities of such circuitry. In accordance with another aspect of the invention, operation in the foregoing manner at comparatively low average output power levels is combined with switch mode operation at comparatively high average output power levels, enabling high overall efficiency to be achieved. Hence, the disclosed modulator and amplifier combination, in addition to supporting very low power signals, also supports high power signals.

    Communications signal amplifiers having independent power control and amplitude modulation
    3.
    发明授权
    Communications signal amplifiers having independent power control and amplitude modulation 有权

    公开(公告)号：US07035604B2

    公开(公告)日：2006-04-25

    申请号：US10887586

    申请日：2004-07-08

    申请人： Wendell B. Sander ,  Ronald A. Meck ,  Earl W. McCune, Jr.

    发明人： Wendell B. Sander ,  Ronald A. Meck ,  Earl W. McCune, Jr.

    IPC分类号： H04B1/04

    CPC分类号： H03F1/0211 ,  H03G3/004 ,  H03G3/3042

    摘要： The present invention, generally speaking, provides methods and apparatus for producing an amplitude modulated communications signal, in which a constant-envelope carrier signal is modified in response to a power control signal to produce a modified constant-envelope carrier signal. The modified constant-envelope carrier signal is amplified in response to an amplitude modulation signal to produce a communications signal having amplitude modulation and having an average output power proportional to a signal level of the modified constant-envelope carrier signal. This manner of operation allows wide dynamic range of average output power to be achieved. Because amplitude modulation is applied after amplitude varying circuitry used to produce the modified constant-envelope carrier signal, the amplitude modulation is unaffected by possible non-linearities of such circuitry. In accordance with another aspect of the invention, operation in the foregoing manner at comparatively low average output power levels is combined with switch mode operation at comparatively high average output power levels, enabling high overall efficiency to be achieved. Hence, the disclosed modulator and amplifier combination, in addition to supporting very low power signals, also supports high power signals.

    Communications signal amplifiers having independent power control and amplitude modulation
    4.
    发明授权
    Communications signal amplifiers having independent power control and amplitude modulation 有权
    具有独立功率控制和幅度调制的通信信号放大器

    公开(公告)号：US07444125B2

    公开(公告)日：2008-10-28

    申请号：US11208301

    申请日：2005-08-19

    申请人： Wendell B. Sander ,  Ronald A. Meck ,  Earl W. McCune, Jr.

    发明人： Wendell B. Sander ,  Ronald A. Meck ,  Earl W. McCune, Jr.

    IPC分类号： H04B1/04

    CPC分类号： H03F1/0211 ,  H03G3/004 ,  H03G3/3042

    摘要： The present invention, generally speaking, provides methods and apparatus for producing an amplitude modulated communications signal, in which a constant-envelope carrier signal is modified in response to a power control signal to produce a modified constant-envelope carrier signal. The modified constant-envelope carrier signal is amplified in response to an amplitude modulation signal to produce a communications signal having amplitude modulation and having an average output power proportional to a signal level of the modified constant-envelope carrier signal. This manner of operation allows wide dynamic range of average output power to be achieved. Because amplitude modulation is applied after amplitude varying circuitry used to produce the modified constant-envelope carrier signal, the amplitude modulation is unaffected by possible non-linearities of such circuitry. In accordance with another aspect of the invention, operation in the foregoing manner at comparatively low average output power levels is combined with switch mode operation at comparatively high average output power levels, enabling high overall efficiency to be achieved. Hence, the disclosed modulator and amplifier combination, in addition to supporting very low power signals, also supports high power signals.

    摘要翻译： 本发明一般地提供了用于产生调幅通信信号的方法和装置，其中恒定包络载波信号响应于功率控制信号被修改以产生修正的恒定包络载波信号。 修正的恒定包络载波信号响应于幅度调制信号被放大，以产生具有幅度调制并具有与修改的恒定包络载波信号的信号电平成比例的平均输出功率的通信信号。 这种操作方式允许实现平均输出功率的宽动态范围。 由于在用于产生修正的恒定包络载波信号的幅度变化电路之后施加幅度调制，所以调幅不受这种电路的可能的非线性的影响。 根据本发明的另一方面，在相当低的平均输出功率电平下，以上述方式的操作与相对较高的平均输出功率电平的开关模式操作相结合，从而实现了高整体效率。 因此，除了支持极低功率信号之外，所公开的调制器和放大器组合也支持高功率信号。

    Notch filter and method
    5.
    发明授权
    Notch filter and method 有权
    陷波滤波器和方法

    公开(公告)号：US06587018B1

    公开(公告)日：2003-07-01

    申请号：US09865972

    申请日：2001-05-25

    申请人： Ronald A. Meck ,  Earl W. McCune, Jr. ,  Edwin R. Twitchell

    发明人： Ronald A. Meck ,  Earl W. McCune, Jr. ,  Edwin R. Twitchell

    IPC分类号： H03H701

    CPC分类号： H03H7/1766 ,  H03H7/075

    摘要： An apparatus and method are provided for attenuating an undesired frequency (f1) relative to a desired frequency (f0) in a signal transmitted from an out-put (220) of an active element (210). Generally, the apparatus includes a parallel-resonant trap (145) coupled to the output of the active element (210), the trap including a network of reactive elements (235).

    摘要翻译： 提供了一种用于在从有源元件（210）的输出（220）发送的信号中相对于期望频率（f0）衰减不期望频率（f1）的装置和方法。 通常，该装置包括耦合到有源元件（210）的输出的并联谐振陷阱（145），所述陷波器包括无功元件（235）的网络。

    Driving circuits for switch mode RF power amplifiers
    6.
    发明授权
    Driving circuits for switch mode RF power amplifiers 有权
    开关模式RF功率放大器的驱动电路

    公开(公告)号：US06198347B1

    公开(公告)日：2001-03-06

    申请号：US09362880

    申请日：1999-07-29

    申请人： Wendell Sander ,  Earl W. McCune, Jr. ,  Ronald A. Meck

    发明人： Wendell Sander ,  Earl W. McCune, Jr. ,  Ronald A. Meck

    IPC分类号： H03F3217

    CPC分类号： H03F3/3076 ,  H03C5/00 ,  H03F1/0227 ,  H03F1/0244 ,  H03F1/0261 ,  H03F3/1935 ,  H03F2200/504 ,  H03G3/004

    摘要： The present invention, generally speaking, provides an RF amplifier circuit architecture that enables high efficiency to be achieved while avoiding complicated matching networks and load networks. The active device may be of the bipolar transistor type or the FET (field effect transistor) type. A simple driving circuit is provided for each type of active device. In accordance with one embodiment of the invention, a single-ended switch mode RF amplifier includes an RF input signal; an active device having a control terminal; and a non-resonant driving circuit for receiving the RF input signal and controlling a signal applied to the control terminal so as to operate the active device in switch mode.

    摘要翻译： 本发明一般地提供了一种能够在避免复杂的匹配网络和负载网络的同时实现高效率的RF放大器电路架构。 有源器件可以是双极晶体管类型或FET（场效应晶体管）类型。 为每种有源器件提供简单的驱动电路。 根据本发明的一个实施例，单端开关模式RF放大器包括RF输入信号; 具有控制端的有源器件; 以及非谐振驱动电路，用于接收RF输入信号并控制施加到控制端的信号，以便以开关模式操作有源器件。

    High-efficiency modulating RF amplifier
    7.
    发明授权
    High-efficiency modulating RF amplifier 有权
    高效调制射频放大器

    公开(公告)号：US06816016B2

    公开(公告)日：2004-11-09

    申请号：US10688444

    申请日：2003-10-16

    申请人： Wendell B. Sander ,  Ronald A. Meck ,  Earl McCune

    发明人： Wendell B. Sander ,  Ronald A. Meck ,  Earl McCune

    IPC分类号： H03F368

    CPC分类号： H03F1/0227

    摘要： The present invention, generally speaking, provides for high-efficiency power control of a high-efficiency (e.g., bard-limiting or switch-mode) power amplifier in such a manner as to achieve a desired control or modulation. Unlike the prior art, feedback is not required. That is, the amplifier may be controlled without continuous or frequent feedback adjustment. In one embodiment, the spread between a maximum frequency of the desired modulation and the operating frequency of a switch-mode DC-DC converter is reduced by following the switch-mode converter with an active linear regulator. The linear regulator is designed so as to control the operating voltage of the power amplifier with sufficient bandwidth to faithfully reproduce the desired amplitude modulation waveform. The linear regulator is further designed to reject variations on its input voltage even while the output voltage is changed in response to an applied control signal. This rejection will occur even though the variations on the input voltage are of commensurate or even lower frequency than that of the controlled output variation. Amplitude modulation may be achieved by directly or effectively varying the operating voltage on the power amplifier while simultaneously achieving high efficiency in the conversion of primary DC power to the amplitude modulated output signal. High efficiency is enhanced by allowing the switch-mode DC-to-DC converter to also vary its output voltage such that the voltage drop across the linear regulator is kept at a low and relatively constant level. Time-division multiple access (TDMA) bursting capability may be combined with efficient amplitude modulation, with control of these functions being combined. In addition, the variation of average output power level in accordance with commands from a communications system may also be combined within the same structure.

    摘要翻译： 一般而言，本发明以实现期望的控制或调制的方式提供高效率（例如限流或开关模式）功率放大器的高效率功率控制。 与现有技术不同，不需要反馈。 也就是说，放大器可以在没有连续或频繁的反馈调整的情况下被控制。 在一个实施例中，通过使用有源线性调节器跟随开关模式转换器来减小所需调制的最大频率与开关模式DC-DC转换器的工作频率之间的扩展。 线性稳压器被设计成以足够的带宽来控制功率放大器的工作电压，以忠实地再现所需的幅度调制波形。 线性稳压器进一步被设计为即使当输出电压响应于所施加的控制信号而改变时也可以抑制其输入电压的变化。 即使输入电压的变化与受控输出变化的变化相当甚至更低的频率，也将发生该抑制。 幅度调制可以通过直接或有效地改变功率放大器上的工作电压来实现，同时实现初级DC功率到幅度调制输出信号的转换的高效率。 通过允许开关模式DC-DC转换器也改变其输出电压，使得线性稳压器两端的电压降保持在较低且相对恒定的水平，从而提高了高效率。 时分多址（TDMA）突发能力可以与有效的幅度调制组合，并且这些功能的控制被组合。 此外，根据来自通信系统的命令的平均输出功率电平的变化也可以在相同的结构内组合。