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公开(公告)号：US6064269A
公开(公告)日：2000-05-16
申请号：US126873
申请日：1998-07-31
CPC分类号： H03F1/0222 , H03F2200/102
摘要： A power amplifier circuit (10) utilizes a step-wise variable voltage source (22) to improve amplifier (14) operating efficiency. In one preferred embodiment, an input signal to the step-wise variable voltage source is obtained by observing an operating characteristic of the amplifier. In an alternate preferred embodiment of the present invention, a characteristic of the input signal driving the amplifier stage is used to form an input signal to the step-wise variable input voltage source.
摘要翻译： 功率放大器电路（10）利用逐级可变电压源（22）来改善放大器（14）的工作效率。 在一个优选实施例中，通过观察放大器的工作特性来获得到逐级可变电压源的输入信号。 在本发明的替代优选实施例中，驱动放大器级的输入信号的特性被用于形成到逐级可变输入电压源的输入信号。
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公开(公告)号：US6084890A
公开(公告)日：2000-07-04
申请号：US977914
申请日：1997-11-25
申请人： Dale Robert Anderson
发明人： Dale Robert Anderson
摘要： A method and apparatus of combining carrier signals (110, 111) includes in a coupler (125) phase shifting signals (110, 111) by substantially 90 degrees to produce phase shifted signals (120, 121), coupling signals (110, 121) to produce a coupled signal (130) and the signals (111, 120) to produce a coupled signal (140). In phase shifters (450, 460), the coupled signals (130, 140) are independently phase shifted according to two independent frequency selective phase shifting functions (150, 160) to produce phase shifted coupled signals (170, 180) which are combined at combiner (190) to produce a combined carrier signal (199). A phase shifting attribute of functions (150, 160) is divided over predetermined frequency bands (210, 220, 230). Over the frequency bands (210) phase shift (260) leads phase shift (250) and lags over the frequency band (230) by substantially 90 degrees.
摘要翻译： 组合载波信号（110,111）的方法和装置在耦合器（125）中包括大致90度的相移信号（110,111）以产生相移信号（120,121），耦合信号（110,121） 以产生耦合信号（130）和信号（111,120）以产生耦合信号（140）。 在移相器（450,460）中，耦合信号（130,140）根据两个独立的频率选择相移函数（150,160）独立地相移，以产生相移耦合信号（170,180），它们被组合在 组合器（190）以产生组合的载波信号（199）。 功能（150,160）的相移属性在预定频带（210,220,230）上被划分。 在频带（210）相移（260）之后，相位偏移（250）和频带（230）上的滞后大致为90度。
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3.发明授权Load limiting circuit and method for limiting the output impedance seen by an amplifier 有权用于限制放大器看到的输出阻抗的负载限制电路和方法
公开(公告)号：US6064266A
公开(公告)日：2000-05-16
申请号：US153799
申请日：1998-09-15
摘要： A load limiting circuit (56) and method for limiting the output impedance seen by an amplifier (12), wherein a load limiting impedance (64), preferably a resister (94), is selectively coupled in parallel with the output impedance by a switch circuit (62), when a threshold detect circuit (60) detects the value of the output impedance (48) rising above a predetermined value. The output impedance is preferably measured by monitoring the output current through a resistor (70) connected in series with the output impedance (48).
摘要翻译： 负载限制电路（56）和用于限制由放大器（12）所看到的输出阻抗的方法，其中负载限制阻抗（64）（优选地电阻器（94））选择性地通过开关与输出阻抗耦合耦合 电路（62），当阈值检测电路（60）检测到输出阻抗（48）的值上升到高于预定值时。 输出阻抗优选通过监视通过与输出阻抗（48）串联连接的电阻器（70）的输出电流来测量。
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4.发明授权Method and system in a hybrid matrix amplifier for configuring a digital transformer 失效用于配置数字变压器的混合矩阵放大器中的方法和系统
公开(公告)号：US5834972A
公开(公告)日：1998-11-10
申请号：US728717
申请日：1996-10-11
CPC分类号： H03F3/602
摘要： In a hybrid matrix amplifier array (100), a configurable digital transform matrix (116) is initialize with a matrix of transform coefficients. A plurality of digital input signals (M.sub.1 -M.sub.4) are received at inputs of the configurable digital transform matrix (116). The plurality of digital input signals are transformed to produce a plurality of transform digital signals (A.sub.1 -A.sub.4) using the matrix of transform coefficients. The plurality of transform digital signals are converted to a plurality of transformed analoged signals (206) to produce a plurality of transformed analog signals. The transformed analog signals are amplified (104, 208) to produce amplified transformed signals. Finally, the amplified transformed signals are inverse transformed (102, 210) to produce output signals that correspond to a respective digital input signal (M.sub.1 -M.sub.4). Upon sensing a failure in an amplifier array (104,126) a controller (128) recalls matrix transform coefficients from a memory (130) and write and reconfigures the digital transform matrix (116) to minimize the effects of the amplifier failure at the hybrid matrix amplifier outputs (132).
摘要翻译： 在混合矩阵放大器阵列（100）中，可配置数字变换矩阵（116）用变换系数的矩阵初始化。 在可配置数字变换矩阵（116）的输入处接收多个数字输入信号（M1-M4）。 多个数字输入信号被变换以使用变换系数的矩阵产生多个变换数字信号（A1-A4）。 多个变换数字信号被转换成多个变换的模拟信号（206）以产生多个变换的模拟信号。 经变换的模拟信号被放大（104,208）以产生放大的变换信号。 最后，放大的变换信号被逆变换（102,210）以产生对应于相应的数字输入信号（M1-M4）的输出信号。 一旦感测到放大器阵列（104,126）中的故障，控制器（128）从存储器（130）回调矩阵变换系数，并写入并重新配置数字变换矩阵（116）以最小化混合矩阵放大器处的放大器故障的影响 输出（132）。
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