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公开(公告)号：US4617522A
公开(公告)日：1986-10-14
申请号：US591438
申请日：1984-03-20
CPC分类号： H03F1/3229
摘要： A temperature regulated feed forward amplifier for use in broad bandwidth cable communications applications, includes an IC amplifier, a fixed voltage power supply for the IC amplifier, temperature sensing circuitry for detecting temperature variations from a preselected reference temperature and regulating the voltage from the fixed voltage power supply to maintain the gain and resultant phase of the amplifier relatively uniform over the bandwidth and over a range of temperatures.
摘要翻译： 用于宽带宽电缆通信应用的温度调节前馈放大器包括IC放大器，用于IC放大器的固定电压电源，温度检测电路，用于检测来自预选参考温度的温度变化，并调节来自固定电压的电压 电源以保持放大器的增益和相位相位在带宽和温度范围内相对均匀。
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公开(公告)号：US20080313696A1
公开(公告)日：2008-12-18
申请号：US11761733
申请日：2007-06-12
CPC分类号： H04B3/14
摘要： A thermal pad controlled equalizer that adjusts the slope and gain of an amplifier in response to changes in ambient temperature, effectively simulating automatic gain control. The equalizer has a slope pad and a gain pad. The slope pad increases the attenuation of the signal in response to increases in ambient temperature. The gain pad decreases the attenuation when ambient temperature increases. Thus, the slope and gain pads together compensate for temperature effects on the system.
摘要翻译： 热垫控制均衡器，可根据环境温度的变化调整放大器的斜率和增益，有效模拟自动增益控制。 均衡器具有斜坡垫和增益垫。 斜坡垫响应于环境温度的增加而增加信号的衰减。 当环境温度升高时，增益垫减小衰减。 因此，斜率和增益焊盘一起补偿对系统的温度影响。
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公开(公告)号：US07683732B1
公开(公告)日：2010-03-23
申请号：US12275139
申请日：2008-11-20
CPC分类号： H04B3/14
摘要： There is disclosed a continuously variable equalizer. The continuously variable equalizer may include a series-tuned circuit connected between an RF signal input terminal and an RF signal output terminal. An adjustable T-pad may have an input terminal coupled to the RF signal input terminal, an output terminal coupled to the RF signal output terminal, and a common terminal. A parallel-tuned circuit may be coupled between the T-pad common terminal and a signal return.
摘要翻译： 公开了一种连续可变均衡器。 连续可变均衡器可以包括连接在RF信号输入端和RF信号输出端之间的串联调谐电路。 可调T形垫可以具有耦合到RF信号输入端的输入端，耦合到RF信号输出端的输出端和公共端。 并联调谐电路可以耦合在T形焊盘公共端和信号返回之间。
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公开(公告)号：US4792751A
公开(公告)日：1988-12-20
申请号：US812744
申请日：1985-12-23
CPC分类号： G01R27/28
摘要： An apparatus for field testing a feedforward amplifier includes a source of an RF signal and a source of an audio frequency signal. Both of these signals are applied to the feedforward amplifier under test. A failure in one of the active elements in the feedforward amplifier will increase the level of distortion and thus produce audio-frequency sidebands on the RF carrier at the output of the feedforward amplifier. These audio sidebands are detected in a double balanced mixer which also receives a phase-shifted RF test signal. The output of the double balanced mixer is representative of the level of amplifier distortion and thus of a failure in the feedforward amplifier.
摘要翻译： 用于现场测试前馈放大器的装置包括RF信号源和音频信号源。 这两个信号都被应用到被测前馈放大器。 前馈放大器中的一个有源元件的故障将增加失真电平，从而在前馈放大器输出端的RF载波上产生音频边带。 这些音频边带在双平衡混频器中被检测，双重平衡混频器也接收相移的RF测试信号。 双平衡混频器的输出表示放大器失真的电平，从而代表前馈放大器的故障。
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公开(公告)号：US20080310128A1
公开(公告)日：2008-12-18
申请号：US11763626
申请日：2007-06-15
IPC分类号： H05K1/00
CPC分类号： H04B3/143
摘要： The electronic component mounts the circuitry and connector pins at the bottom of a substrate. The upper portion of the substrate has one or more weakened horizontal lines allowing the user to break off part of the upper portion of the substrate. Doing so allows a technician to shorten the component so that it properly fits into a cable system amplifier. A cap with indicia or color-coding may fit over the top of the substrate to help handling the component and identifying its type and electrical values.
摘要翻译： 电子部件将电路和连接器引脚安装在基板的底部。 衬底的上部具有一个或多个弱化的水平线，允许使用者断开衬底的上部的一部分。 这样做可使技术人员缩短组件，使其适合于电缆系统放大器。 具有标记或颜色编码的盖可以安装在基板的顶部以帮助处理部件并识别其类型和电气值。
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公开(公告)号：US4694258A
公开(公告)日：1987-09-15
申请号：US840428
申请日：1986-03-14
IPC分类号： H03F1/32
CPC分类号： H03F1/3235 , H03F2201/3212
摘要： A method and system for enhancing the performance of feedforward amplifiers includes the provision of multiple sweep displays, one each for providing a display of a single performance characteristic of the amplifier. Various characteristics are monitored on an alternating and interleaved basis, and displayed during the intervals that they are monitored. The monitoring intervals are short enough so that each display appears to be continuous. The performance characteristics of the amplifier are thus observable on a real time basis, thereby facilitating adjustment of the amplifier to achieve optimum overall operation.
摘要翻译： 用于增强前馈放大器的性能的方法和系统包括提供多个扫描显示器，每个扫描显示器用于提供放大器的单个性能特性的显示。 在交替和交错的基础上监视各种特征，并在监视它们的间隔期间显示。 监视间隔足够短，以使每个显示器看起来都是连续的。 因此放大器的性能特性可以在实时的基础上观察到，从而便于放大器的调整以实现最佳的整体操作。
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公开(公告)号：US4472725A
公开(公告)日：1984-09-18
申请号：US344786
申请日：1982-02-01
CPC分类号： H03H7/325 , H03F1/3229
摘要： A tuneable lumped LC electronic delay line for delaying RF signals in a bandwidth of at least 100 MHz by a substantially constant amount throughout the band, the delay line including a plurality of deformable air coil inductors that are inductively coupled to one another, a plurality of capacitors connected between each inductor pair and electrical ground, and a reactive element connected at one end of the series of inductors and reactively coupled to electrical ground.
摘要翻译： 一种可调谐的集总液晶电子延迟线，用于将至少100MHz的带宽中的RF信号延迟整个频带内的基本恒定的量，所述延迟线包括彼此感应耦合的多个可变形的空气线圈电感器，多个 连接在每个电感器对和电接地之间的电容器，以及连接在所述一系列电感器的一端并且反应地耦合到电接地的电抗元件。
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