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1. 发明授权

US07023278B1 Digital power amplifier level control 有权
标题翻译：数字功放级控制
公开(公告)号：US07023278B1
公开(公告)日：2006-04-04
申请号：US10946083
申请日：2004-09-21
申请人： Michael R. Vagher , Clayton Harmon , Andrew J. Wiebold
发明人： Michael R. Vagher , Clayton Harmon , Andrew J. Wiebold
IPC分类号： H03G3/10
CPC分类号： H03G3/001 , H03G3/3042
摘要： A digital power amplifier with variable output power control is disclosed. An amplifying stage includes a first attenuator that applies one of n attenuation steps to an RF signal in response to a desired output power level of the digital power amplifier. A feedback loop provides a gain control signal to the amplifying stage based upon an output of the amplifying stage. The feedback loop includes a second attenuator that applies another of the n attenuation steps to a sample of the output of the amplifying stage. The second attenuator applies the kth highest of the n attenuation steps when the first attenuator applies the kth lowest of the n attenuation steps, where 1≦k≦n.
摘要翻译：公开了具有可变输出功率控制的数字功率放大器。放大级包括响应于数字功率放大器的期望输出功率电平而将n个衰减步骤中的一个施加到RF信号的第一衰减器。反馈环路基于放大级的输出向放大级提供增益控制信号。反馈回路包括将n个衰减步骤中的另一个施加到放大级的输出的样本的第二衰减器。当第一衰减器施加n个衰减步骤中的第k个第个最低值时，第二衰减器施加n个衰减步长的第k个/最高值，其中1≤k≤n 。

2. 发明授权

US06021323A Direct conversion receiver with reduced even order distortion 失效
标题翻译：具有降低偶数阶失真的直接转换接收器
公开(公告)号：US06021323A
公开(公告)日：2000-02-01
申请号：US937484
申请日：1997-09-25
申请人： Michael R. Vagher
发明人： Michael R. Vagher
IPC分类号： H03D7/14 , H04B1/10 , H04B1/18 , H04B1/30 , H04Q7/32
CPC分类号： H04B1/109 , H03D7/1408 , H03D7/1433 , H03D7/1441 , H03D7/1458 , H03D2200/0033 , H03D2200/0088 , H04B1/18 , H04B1/30
摘要： A mixer for use in a direct conversion receiver includes a compensating differential amplifier which injects equal amplitude opposite phase currents with respect to even order distortion currents. The compensating differential amplifier utilizes an ideal current source. The mixer is an active mixer which utilizes four switching transistors. The even order distortion is introduced by non-linear components which demonstrate strong off-channel signals.
摘要翻译：用于直接转换接收机的混频器包括补偿差分放大器，其针对偶数阶失真电流注入等幅度相反的相电流。补偿差分放大器利用理想电流源。混频器是利用四个开关晶体管的有源混频器。偶数阶失真由表示强大的非通道信号的非线性分量引入。

3. 发明授权

US08310304B1 Power amplifier control system with gain calibration 有权
标题翻译：功率放大器控制系统，具有增益校准功能
公开(公告)号：US08310304B1
公开(公告)日：2012-11-13
申请号：US12974465
申请日：2010-12-21
申请人： Michael R. Vagher , Clayton Harmon
发明人： Michael R. Vagher , Clayton Harmon
IPC分类号： H03G3/20
CPC分类号： H03G3/3042 , H03G3/3052
摘要： A digital power amplifier is disclosed. The digital power amplifier may comprise an amplifying stage configured for applying a first level of attenuation to an RF input signal in response to a desired output power level of the digital power amplifier; a reference loop configured for determining an average power of a sample of the RF input signal and providing a reference value at least partially based upon the average power of the sample of the RF input signal; a feedback loop configured for applying a second level of attenuation to a sample of an output of the amplifying stage and providing a feedback value indicating an average power of the attenuated sample of the output; and an error amplifier configured for providing a gain control adjustment signal to the amplifying stage, the gain control adjustment signal being determined based upon the reference value and the feedback value.
摘要翻译：公开了一种数字功率放大器。数字功率放大器可以包括放大级，被配置为响应于数字功率放大器的期望输出功率电平向RF输入信号施加第一级衰减; 参考回路，被配置为用于确定RF输入信号的采样的平均功率，并且至少部分地基于RF输入信号的采样的平均功率提供参考值; 反馈回路，被配置为向放大级的输出的采样施加第二级衰减，并提供指示输出的衰减样本的平均功率的反馈值; 以及误差放大器，被配置为向所述放大级提供增益控制调整信号，所述增益控制调整信号基于所述参考值和所述反馈值来确定。

4. 发明授权

US5313172A Digitally switched gain amplifier for digitally controlled automatic gain control amplifier applications 失效
标题翻译：用于数字控制的自动增益控制放大器应用的数字开关增益放大器
公开(公告)号：US5313172A
公开(公告)日：1994-05-17
申请号：US989607
申请日：1992-12-11
申请人： Michael R. Vagher
发明人： Michael R. Vagher
IPC分类号： H03G3/00 , H03G3/30
CPC分类号： H03G3/001
摘要： A digitally switched gain amplifier designed for use in binary controlled systems. The amplifier is designed for fabrication as a monolithic integrated circuit. The amplifier provides gain that varies in discrete levels in a binary manner under direct control of a digital word. The smallest resolution, or distance between gain steps, is one decibel and the maximum amount of gain reduction is determined by the number of stages included in the amplifier. The incremental resolution of the amplifier allows for the amplifier to keep a received signal at a constant level with a digital word. Thus, eliminating the need for digital to analog conversion.
摘要翻译：设计用于二进制控制系统的数字开关增益放大器。该放大器专为制造单片集成电路而设计。在数字字的直接控制下，放大器以二进制方式提供以离散电平变化的增益。增益步长之间的最小分辨率或距离是一分贝，并且最大增益减少量由放大器中包含的级数确定。放大器的增量分辨率允许放大器通过数字字将接收信号保持在恒定电平。因此，无需数字到模拟转换。

5. 发明授权

US07835427B1 Multiplexed architecture for simultaneous transmission and reception 有权
标题翻译：用于同时传输和接收的多路复用架构
公开(公告)号：US07835427B1
公开(公告)日：2010-11-16
申请号：US11731798
申请日：2007-03-30
申请人： Carlos J. Chavez , Robert Joseph Frank , Michael R. Vagher , Carlen R. Welty
发明人： Carlos J. Chavez , Robert Joseph Frank , Michael R. Vagher , Carlen R. Welty
IPC分类号： H04B1/38
CPC分类号： H04B1/713 , H04B1/7143
摘要： A system for simultaneously transmitting and receiving signals in a frequency hopping system. The system includes a multiplexor configured to filter a plurality of frequency hopping message pulses based on a frequency associated with each pulse, a plurality of transceivers configured to receive the pulses from the multiplexor, and a modem configured for simultaneous transmission and reception whereby transmission of the pulses are isolated from potentially received pulses by selecting a specific sub-band and transceiver corresponding to the specific sub-band through which to transmit each pulse.
摘要翻译：一种在跳频系统中同时发送和接收信号的系统。该系统包括：多路复用器，被配置为基于与每个脉冲相关联的频率来过滤多个跳频消息脉冲;多个收发器，被配置为从多路复用器接收脉冲;以及调制解调器，被配置为用于同时发送和接收，通过选择与通过其发送每个脉冲的特定子带相对应的特定子带和收发器来将脉冲与潜在接收的脉冲隔离。

6. 发明授权

US5507036A Apparatus with distortion cancelling feed forward signal 失效
标题翻译：具有失真消除前馈信号的装置
公开(公告)号：US5507036A
公开(公告)日：1996-04-09
申请号：US316285
申请日：1994-09-30
申请人： Michael R. Vagher
发明人： Michael R. Vagher
IPC分类号： H03D3/00 , H03D7/14 , H04B1/30 , H04B1/10
CPC分类号： H03D3/002 , H03D7/14 , H04B1/30
摘要： An apparatus and a method for cancelling distortion in a direct conversion receiver, such distortion created by the mixing of the desired signal with the output signal of an local oscillator. Subsequent to filtering the mixer output signal, the even mode distortion component is extracted, phase shifted, amplified and recombined with the mixed signal in such manner as to suppress even order distortion.
摘要翻译：用于消除直接转换接收机中的失真的装置和方法，通过将所需信号与本地振荡器的输出信号混合而产生的失真。在对混频器输出信号进行滤波之后，以抑制偶数阶失真的方式提取偶相模式失真分量，相移，放大并与混合信号重组。

7. 发明授权

US06362685B1 Power amplifier with multilevel power modes 有权
标题翻译：具有多电平功率模式的功率放大器
公开(公告)号：US06362685B1
公开(公告)日：2002-03-26
申请号：US09619814
申请日：2000-07-20
申请人： Michael R. Vagher
发明人： Michael R. Vagher
IPC分类号： H03F368
CPC分类号： H03F3/602 , H03F3/72 , H03F2200/198 , H03F2203/7239
摘要： A multilevel power amplifier using hybrid couplers is disclosed. A splitter network is connected to an input amplifier stage that amplifies and modulates the input signal with the outputs of the splitter network connected to switches for selecting desired splitter output signals. The desired splitter output signals are amplified by power amplifier stages connected to the switches. A bypass network is connected to the splitter network and an output combiner network to bypass the power amplifier stages. The output combiner network is connected to the power amplifier stages and to the bypass network to combine the bypass signals and the amplified signals into a desired power output signal. Two or four power amplifier stages may be used to deliver power at low, medium, and high power levels.
摘要翻译：公开了一种使用混合耦合器的多电平功率放大器。分路器网络连接到输入放大器级，该放大器级用连接到开关的分路器网络的输出放大和调制输入信号，用于选择所需的分路器输出信号。所需的分路器输出信号由连接到开关的功率放大器级放大。旁路网络连接到分路器网络和输出组合器网络以旁路功率放大器级。输出组合器网络连接到功率放大器级和旁路网络，以将旁路信号和放大的信号组合成期望的功率输出信号。可以使用两个或四个功率放大器级来在低，中和高功率水平下传送功率。

8. 发明授权

US5613233A Apparatus with distortion cancelling feedback signal 失效
标题翻译：具有失真消除反馈信号的装置
公开(公告)号：US5613233A
公开(公告)日：1997-03-18
申请号：US316287
申请日：1994-09-30
申请人： Michael R. Vagher
发明人： Michael R. Vagher
IPC分类号： H03D7/14 , H03F3/45 , H04B1/30 , H04B1/10
CPC分类号： H03F1/3211 , H03D7/1433 , H03D7/1458 , H03D7/1491 , H03D7/165 , H03F3/45089 , H03F3/45502 , H04B1/30 , H03F2203/45311 , H03F2203/45392 , H03F2203/45418 , H03F2203/45424 , H03F2203/45441 , H03F2203/45466 , H03F2203/45476 , H03F2203/45496 , H03F2203/45638 , H03F2203/45702
摘要： An apparatus having a distortion cancelling feedback signal that suppresses undesired signal components. One embodiment of the present invention is comprised of a balanced mixer coupled to a common-mode detector, a filter and having a resulting feedback signal that suppresses the common-mode component of the mixer output signal while allowing the differential component of the mixer output signal to pass on to additional processing.
摘要翻译：具有抑制不期望的信号分量的失真消除反馈信号的装置。本发明的一个实施例包括耦合到共模检测器，滤波器的平衡混频器，并且具有得到的反馈信号，其抑制混频器输出信号的共模分量，同时允许混频器输出信号的差分分量传递到额外的处理。

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