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公开(公告)号：US3753169A
公开(公告)日：1973-08-14
申请号：US3753169D
申请日：1972-08-09
发明人： CONDON J
CPC分类号： H03H19/002
摘要： Plural commutating capacitor, 2-terminal, impedance devices are substituted for plural inductance-capacitance circuits in shunt branches of a 3-element pi -section bandpass filter. Commutation switch drives for the units are provided at 30 electrical degrees phase difference, but at the same frequency.
摘要翻译： 多个换向电容器，2端子，阻抗器件代替3元件pi段带通滤波器的分流支路中的多个电感 - 电容电路。 整流器的换向开关驱动器以30电度相位差提供，但频率相同。
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2.发明授权
公开(公告)号：US3753160A
公开(公告)日：1973-08-14
申请号：US3753160D
申请日：1972-04-20
申请人： EMERSON ELECTRIC CO
发明人： SAFRAN P
CPC分类号： H01P1/19
摘要： A ferrite phase shifter having a pair of nonreciprocal circular polarizers with a nonreciprocal phase shifter between them, including an electronic control for altering the magnetization of the nonreciprocal circular polarizers. This arrangement may be used to compensate for temperature and power changes and may provide a bandwidth substantially equal to the theoretical for a ferrite loaded waveguide of the same configuration. In the preferred embodiment the waveguide is square, the nonreciprocal circular polarizer (NRCP) is of the transversely magnetized quadrupole field type, and electronically controllable electromagnets at each corner of the NRCP sections provide the required level of magnetization to maintain accurate 90* phase shift of orthogonal vector components of the propagating electromagnetic wave. Also in the preferred embodiment, a linear polarizer at one end of the phase shifter includes a resistive film, and a detector diode is attached to the film to detect deviations of the propagating wave from the desired linear polarization. The detector diode is a part of a control circuit which adjusts the NRCP control magnet settings.
摘要翻译： 一种铁氧体移相器，具有一对在其间具有非互易移相器的不可逆圆偏振器，包括用于改变非可逆圆偏振器的磁化的电子控制。 这种布置可以用于补偿温度和功率变化，并且可以提供与相同构造的铁氧体负载波导的理论基本相等的带宽。 在优选实施例中，波导是正方形的，不可逆圆偏振器（NRCP）是横向磁化的四极场型，并且在NRCP部分的每个拐角处的电子可控电磁铁提供所需的磁化水平以保持准确的90°相移 传播电磁波的正交矢量分量。 同样在优选实施例中，移相器一端的线性偏振器包括电阻膜，并且检测器二极管附着到膜上以检测传播波与期望的线偏振的偏差。 检测器二极管是调整NRCP控制磁体设置的控制电路的一部分。
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公开(公告)号：US4217562A
公开(公告)日：1980-08-12
申请号：US937527
申请日：1978-08-28
申请人： John M. Rollett , Alan J. Greaves
发明人： John M. Rollett , Alan J. Greaves
CPC分类号： H04B3/145
摘要： An equalizer network that exhibits stability and may be cascaded with a transmission channel is disclosed. The network includes only two operational amplifiers, resistors and capacitors and provides a bump shaped amplitude characteristic at resonance frequency. The equalizer may be modified to exhibit selectively a `bump` or `dip` at resonance, and may be so constructed that trimming operations and the independent selection of parameters is facilitated.
摘要翻译： 公开了一种展现稳定性并且可以与传输通道级联的均衡器网络。 该网络仅包括两个运算放大器，电阻器和电容器，并且在谐振频率处提供凸起形状的振幅特性。 均衡器可以被修改为在谐振时选择性地展现“凸起”或“倾斜”，并且可以被构造成便于修整操作和参数的独立选择。
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4.发明授权Technique for supplying reference for an adaptive equalizer when multiple phase signals are transmitted 失效当发送多个相位信号时，为自适应均衡器提供基准的技术
公开(公告)号：US4151491A
公开(公告)日：1979-04-24
申请号：US837355
申请日：1977-09-28
申请人： Daniel D. McRae
发明人： Daniel D. McRae
CPC分类号： H04L27/01
摘要： The adverse effects of node slips on the operation of an adaptive equalizer are corrected by determining phase and amplitude errors in the received vector signal relative to phase and amplitude estimates, based on node decisions. The phase and amplitude error signals are aligned in a prescribed fashion with the tip of the received signal vector and, from this alignment, respective X and Y components of the error signals are obtained and fed back to the equalizer as projected X and projected Y errors for updating the equalizer weights.
摘要翻译： 基于节点决定，通过相对于相位和幅度估计确定接收矢量信号中的相位和幅度误差来校正节点滑移对自适应均衡器的操作的不利影响。 相位和幅度误差信号以规定的方式与接收信号向量的尖端对齐，并且从该对准中获得误差信号的相应X和Y分量，并将其反馈到均衡器作为投影X和投影的Y误差 用于更新均衡器权重。
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公开(公告)号：US4125899A
公开(公告)日：1978-11-14
申请号：US807671
申请日：1977-06-17
CPC分类号： H04B3/141 , H04L25/03038
摘要： A Bessel function type automatic delay equalizer comprising a plurality of transversal filters each of which has an independent delay cosine equalization component having a predetermined period, and the superposition of those filters providing the desired characteristics, characterized in that, said equalizer further comprises a Bessel function generator for controlling the tap gain of said transversal filters.
摘要翻译： 一种贝塞尔函数类型自动延迟均衡器，包括多个横向滤波器，每个滤波器具有具有预定周期的独立延迟余弦均衡分量，以及提供所需特性的那些滤波器的叠加，其特征在于，所述均衡器还包括贝塞尔函数 发生器，用于控制所述横向滤波器的抽头增益。
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公开(公告)号：US4032866A
公开(公告)日：1977-06-28
申请号：US666229
申请日：1976-03-12
申请人： Hans-Joachim Schmidt
发明人： Hans-Joachim Schmidt
摘要： A low loss corrective network for obtaining a desired overall frequency response comprises a plurality of tunable resonant circuit stages which are operative for modifying the frequency response over respective portions of the frequency spectrum. Each resonant stage comprises a variable differential capacitor having two stator plate input terminals and a rotor plate output terminal. Each stator plate input terminal is connected to respective end terminals of a source. A single voltage divider common to all of the stages has two end terminals which are connected with the source and which are also commonly connected with all of the respective stator plate input terminals of the individual stages, and a tap point located intermediate the end terminals of the divider which is commonly connected with all of the respective rotor plate output terminals of the individual stages. Moreover, matching resistors and inductors are employed to compensate for the capacitive loading presented by the differential capacitors. Finally, decoupling resistors are connected between the respective rotor plate output terminals of successive pairs of resonant stages.
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公开(公告)号：US3883832A
公开(公告)日：1975-05-13
申请号：US30420472
申请日：1972-11-06
申请人： FOSGATE JAMES WAYNE
发明人： FOSGATE JAMES WAYNE
CPC分类号： H03H7/065 , H03H7/1725
摘要： A parallel-T audio frequency notch filter utilizing an additional resistive control element which when increased in resistive value forces the parallel-T to lower its maximum attenuation position along the frequency spectrum in accordance with said resistance changes.
摘要翻译： 利用附加电阻控制元件的并行T音频陷波滤波器，当电阻值增加时，根据所述电阻变化，迫使并行T降低其沿着频谱的最大衰减位置。
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公开(公告)号：US3573667A
公开(公告)日：1971-04-06
申请号：US3573667D
申请日：1969-10-08
发明人： KAO CHIH-YU , KURTH CARL F
CPC分类号： H04B3/141
摘要： An equalizer of a coaxial transmission system is automatically adjusted by applying a sweep signal to the equalizer and comparing the output of the equalizer with a predetermined reference signal to develop an error signal. The output signal of the equalizer is simultaneously converted into a plurality of weighting signals, each representing the energy content of the output signal within a passband which includes one equalizer transmission network characteristic, i.e., ''''bump.'''' Each weighting signal is multiplied by the error signal and integrated to develop a control signal for the associated equalizer transmission network.
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公开(公告)号：US4196405A
公开(公告)日：1980-04-01
申请号：US846907
申请日：1977-10-31
CPC分类号： H04L25/03038
摘要： The invention consists in an equalization system with two sections, one at each end of a transmission channel. The section at the transmission end adds control signals to information signals to be transmitted over the line. The section at the reception end generates control signals identical to those added at the transmission end and in phase with the control signals received over the transmission channel, which are separated from the received information signals by means of a first transversal filter with controllable weighting coefficients, the reciprocal transfer function of the transmission channel being synthesized from the locally generated and the received control signals by means of a second transversal filter with controllable weighting coefficients, equalization being achieved by means of a third transversal filter with the same design and same weighting coefficients as the second transversal filter. The invention is applicable to the transmission of data over telephone lines.
摘要翻译： 本发明包括具有两个部分的均衡系统，一个在传输通道的每一端。 传输端的部分将控制信号添加到要通过线路发送的信息信号。 接收端的部分产生与在发送端相加的控制信号，并且与通过传输信道接收的控制信号相同，该控制信号通过具有可控加权系数的第一横向滤波器与接收的信息信号分离， 通过具有可控加权系数的第二横向滤波器，从本地生成的和接收的控制信号合成传输信道的互易传递函数，通过具有相同设计和相同加权系数的第三横向滤波器来实现均衡 第二个横向过滤器。 本发明适用于通过电话线传输数据。
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公开(公告)号：US4166197A
公开(公告)日：1979-08-28
申请号：US891694
申请日：1978-03-30
申请人： Robert A. Moog , Richard M. Walborn
发明人： Robert A. Moog , Richard M. Walborn
CPC分类号： H03G5/025
摘要： An improved frequency sensitive circuit capable of adjusting one or more of its parameters in order to shunt an adjustable amount of electrical signal to a current sink, thereby controlling the amplitude of the signal. The frequency sensitive circuit is connected to the wiper of a potentiometer that is placed across the inputs of a difference amplifier in order to control the peak value of the cut or boost in the signal. The frequency sensitive circuit includes a shunt impedance connected between the wiper of the potentiometer and the current sink. A resonant circuit is connected to the impedance and is tuned to an adjustable resonant frequency. A compensation circuit, such as a difference amplifier referenced to the wiper, couples the output of the resonant circuit to the shunt impedance so that the impedance of the frequency sensitive circuit approaches infinity as the frequency of the electrical signal is displaced from the resonant frequency. As a result, the frequency sensitive circuit has substantially no effect on the overall amplitude of the electrical signal at frequencies widely displaced from the resonant frequency.
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