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11.发明授权
公开(公告)号：US4140983A
公开(公告)日：1979-02-20
申请号：US808450
申请日：1977-06-21
申请人： Michitoshi Tamori , Hidemi Kuroda
发明人： Michitoshi Tamori , Hidemi Kuroda
CPC分类号： H04B3/141
摘要： In a delay equalizer having a plurality of quadratic all pass networks for equalizing the delay characteristics of a circuit, the automatic adjustment of the value of Q of each quadratic all pass network when calculated through the asymptotic formula ##EQU1## CAN PROVIDE PERFECT DELAY EQUALIZATION, WHERE Q.sub.i.sup.k is the value of Q of the i'th quadratic all pass network, and .alpha..sub.i is the step size parameter of i'th quadratic all pass network. Before applying said formula, the delay of the circuit to be equalized at the center frequency of each quadratic all pass network is measured, and said formula is calculated according to the result of the measurement.
摘要翻译： 在具有用于均衡电路的延迟特性的多个二次全通路的延迟均衡器中，当通过渐近公式“IMAGE”CAN提供完美的延迟均衡化计算时，自动调整每个二次全通过网络的Q值， 在哪里Qik是第二个二次全通网络的Q值，而αi是第i个二次全通网络的步长参数。 在应用所述公式之前，测量在每个二次全通网络的中心频率处均衡的电路的延迟，并且根据测量结果计算所述公式。
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公开(公告)号：US4027258A
公开(公告)日：1977-05-31
申请号：US691808
申请日：1976-06-01
申请人： Donald A. Perreault
发明人： Donald A. Perreault
CPC分类号： H04L25/03038
摘要： An automatic equalizer for calculating the equalization transfer function and applying same to equalize signals received from a transmission channel. Time domain equalization is achieved using a transversal filter whose tap weights are calculated in the frequency domain during an initial training period.
摘要翻译： 一种用于计算均衡传递函数并将其应用于均衡从传输信道接收的信号的自动均衡器。 使用横向滤波器来实现时域均衡，该滤波器在初始训练期间在频域中计算其抽头权重。
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公开(公告)号：US4013980A
公开(公告)日：1977-03-22
申请号：US590507
申请日：1975-06-26
申请人： Gero Schollmeier
发明人： Gero Schollmeier
IPC分类号： H04L25/03 , H04L25/497 , H04B3/04 , H03H7/16
CPC分类号： H04L25/497 , H04L25/03057
摘要： An equalizer for partial response signals is described which is constituted by a shift register and an analog adder, from the output of which a corrected signal is produced. Two of the switching stages forming the shift register have their outputs connected to inputs of an additional analog adder, and one of these shift register stage outputs is connected to the analog adder over an adjustable amplifier. The output of the additional analog adder is connected to a correlator, the value of the output signal of which controls the gain of the adjustable amplifier.
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公开(公告)号：US3930209A
公开(公告)日：1975-12-30
申请号：US36727573
申请日：1973-06-05
申请人： GEN SIGNAL CORP
CPC分类号： H04B3/40
摘要： A transmission line simulator which is capable of simulating a variety of transmission lines. In addition to simulating the specified characteristics of these transmission lines, the simulator is also capable of simulating a number of random transmission line effects which are especially important to digital data transmission. Among these transmission line effects that can be simulated are phase jitter, frequency shift, amplitude hit and/or drop out, harmonic distortion, phase hit, broad band and impulse noise. Each of these effects can be simulated along with simulating delay and attenuation of one of the transmission lines. The amplitude, frequency and timing of the random effects can be varied by an operator, or, if desired, omitted. As a portion of the simulator disclosed herein, a novel line simulator is employed for simulating specified characteristics which are attenuation and delay. It is made up of a number of operational amplifier filters whose filter characteristics can be electronically switched to simulate a variety of different characteristics such as the different line characteristics available from the common carriers.
摘要翻译： 能够模拟各种传输线路的传输线模拟器。 除了模拟这些传输线的指定特性之外，仿真器还能够模拟对于数字数据传输特别重要的多个随机传输线效应。 可以模拟的这些传输线效应是相位抖动，频移，振幅发生和/或丢失，谐波失真，相位命中，宽带和脉冲噪声。 可以模拟这些效应中的每一个以及模拟传输线之一的延迟和衰减。 随机效应的幅度，频率和时间可以由操作者改变，或者如果需要，可以省略。 作为本文公开的模拟器的一部分，采用新颖的线模拟器来模拟作为衰减和延迟的指定特性。 它由多个运算放大器滤波器组成，其滤波器特性可以进行电子切换，以模拟各种不同的特性，例如从公共载波可用的不同线路特性。
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公开(公告)号：US3900806A
公开(公告)日：1975-08-19
申请号：US45782574
申请日：1974-04-04
发明人： CAROLI IGNAZIO
摘要： A group-delay equalizer for microwave frequencies, comprising a meander folded transmission line, comprising means for separately changing the electric wave lengths of said folded transmission line associated with two different modes of propagation of the electromagnetic energy along said line.
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公开(公告)号：US3845416A
公开(公告)日：1974-10-29
申请号：US39601573
申请日：1973-09-10
发明人： DOLBY R
摘要： Compressor and expander circuits are constructed by coupling the outputs of two circuit paths together by a variable coupling means. The inputs of the circuit paths are connected to a common input terminal. The degree of coupling provided by the coupling means varies in dependence upon a signal level in the circuit and the variable coupling means and elements in at least one of the paths interact to narrow the band in which the compressor or expander action takes place as the signal level in this band increases.
摘要翻译： 压缩机和膨胀器电路通过可变耦合装置将两个电路路径的输出耦合在一起而构成。 电路路径的输入连接到公共输入端。 由耦合装置提供的耦合度根据电路中的信号电平和可变耦合装置而变化，并且至少一个路径中的元件相互作用以使压缩机或扩展器动作发生的频带变窄，作为信号 该频段的水平增加。
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17.发明授权Attenuation equalizer for correcting a temperature and frequency-dependent cable attenuation 失效用于校正温度和频率相关电缆衰减的衰减均衡器
公开(公告)号：US4208640A
公开(公告)日：1980-06-17
申请号：US914853
申请日：1978-06-12
CPC分类号： H04B3/141
摘要： Attenuation equalizer for correcting within a frequency range the temperature and frequency-depending attenuation variation of cables, comprising a cascade arrangement of a fixed and a variable attenuation correction circuit, connected to a control circuit, the variable attenuation correction circuit comprising a bridge-T network having a series arrangement, of two identical series resistors bridged by a variable bridging impedance and a parallel impedance connected between these two series resistors, the fixed attenuation correction circuit having a lower attenuation for higher frequencies than for lower frequencies, the temperature dependency of the cable being eliminated in the variable attenuation correction circuit and the frequency dependence being eliminated mainly in the fixed attenuation correction circuit for which purpose the variable attenuation correction circuit comprises only two adjustable components.
摘要翻译： 衰减均衡器，用于在频率范围内校正连接到控制电路的固定和可变衰减校正电路的级联布置的电缆的温度和频率依赖衰减变化，所述可变衰减校正电路包括桥接T网络 具有串联布置，由可变桥接阻抗桥接的两个相同的串联电阻器和连接在这两个串联电阻器之间的并联阻抗，固定衰减校正电路具有比用于较低频率的较高频率的较低衰减，电缆的温度依赖性 在可变衰减校正电路中被消除，并且主要在固定衰减校正电路中消除频率依赖性，为此目的，可变衰减校正电路仅包括两个可调组件。
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公开(公告)号：US4182997A
公开(公告)日：1980-01-08
申请号：US860835
申请日：1977-12-15
申请人： Giuliano Brambilla
发明人： Giuliano Brambilla
CPC分类号： H01P7/005 , H03H7/01 , H03H7/1791
摘要： A filter for a telecommunication system, designed to suppress a signal frequency F.sub.a and to transmit an adjoining frequency F.sub.b without significant attenuation, comprises a resonant cavity of prismatic shape longitudinally traversed by a conductive coil wound on a hollow dielectric core into which an adjusting screw is inserted. One end of the coil is grounded at the cavity wall while its other end is left unconnected and forms with the adjusting screw a variable capacitance C.sub.d with distributed constants; a lumped-constant tuning capacitor C.sub.1 is connected between ground and an input lead connected to an intermediate tap on the coil, the inductance L.sub.2 " of that lead and the inductance L.sub.2 ' of the coil portion between the tap and ground forming an inductive voltage divider bridged by the lumped-constant capacitor C.sub.1. The remainder of the coil, lying between the tap and the unconnected end, forms an inductance L.sub.1 which together with the distributed-constant capacitance C.sub.d shunts the portion L.sub.2 ' of the inductive divider and forms a series-resonant circuit tuned to frequency F.sub.a ; the combination of voltage divider L.sub.2 ', L.sub.2 " and lumped-constant capacitor C.sub.1 constitutes a parallel-resonant circuit tuned to frequency F.sub.b.
摘要翻译： 用于电信系统的滤波器被设计成抑制信号频率Fa并传输相邻频率Fb而没有显着的衰减，包括由缠绕在空心介质芯上的导电线圈纵向穿过的棱柱形谐振腔，调节螺钉 插入。 线圈的一端在空腔壁处接地，而另一端未连接，并用调节螺钉形成具有分布常数的可变电容Cd; 集总常数调谐电容器C1连接在接地和连接到线圈上的中间抽头的输入引线之间，该引线的电感L2“和抽头和接地之间的线圈部分的电感L2'形成感应电压 由集总电容器C1桥接的分压器。 位于抽头和未连接端之间的线圈的其余部分形成电感L1，其与分布常数电容Cd一起分流电感分压器的部分L2'，并形成调谐到频率Fa的串联谐振电路; 分压器L2'，L2“和集总常数电容器C1的组合构成调谐到频率Fb的并联谐振电路。
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公开(公告)号：US4046960A
公开(公告)日：1977-09-06
申请号：US645805
申请日：1975-12-31
申请人： John R. Veale
发明人： John R. Veale
CPC分类号： H03G5/025
摘要： An audio fidelity frequency equalizer system for use with audio fidelity sound equipment in order to frequency contour sound reproduction to obtain a desired listening environment. The frequency equalizer system of the present invention includes a plurality of potentiometer controls for adjusting the frequency output in each of the eleven major separate octave bands which cover a range from approximately 20 Hz to approximately 20,000 Hz. The frequency equalizer system of the present invention includes an operational amplifier with each of the aforementioned potentiometers connected across the equalizer in feedback relationship. Moreover, each of the potentiometers operate in conjunction with a unique resonance circuit in order to achieve the desired frequency adjustability of the octave bands.
摘要翻译： 一种用于音频保真声音设备的音频保真频率均衡器系统，以便于频率轮廓声音再现以获得期望的听觉环境。 本发明的频率均衡器系统包括多个电位计控制器，用于调节覆盖从大约20Hz到大约20,000Hz的范围的十一个主要单独八度波段中的每一个中的频率输出。 本发明的频率均衡器系统包括一个运算放大器，每个上述电位器以反馈关系跨过均衡器连接。 此外，每个电位器与独特的谐振电路一起工作，以实现八度频带所需的频率可调性。
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公开(公告)号：US4028644A
公开(公告)日：1977-06-07
申请号：US639107
申请日：1975-12-09
申请人： Yasuhiko Niiro
发明人： Yasuhiko Niiro
摘要： A system equalizer and a method of equalization employed in a repeatered submarine cable system, in which automatic gain controlled (AGC) submerged repeaters are employed to compensate for fluctuations of the cable loss caused by the temperature fluctuations in the surrounding environment of the repeatered submarine cable system. In a terminal equipment connected to the repeatered submarine cable system, the seasonal misalignment of the repeatered cable system is equalized by a switchable equalizer having a loss-frequency characteristic corresponding to the total of compensation errors in the AGC submerged repeaters. Short-term level fluctuations of the repeatered cable system are compensated by an automatic equalizer, which has a loss-frequency characteristic proportional to the square root of frequency f and is controlled by the level of a pilot signal transmitted through the repeatered submarine cable system. An unknown fixed deviation is finally equalized by a second adjustable equalizer.
摘要翻译： 在重复的海底电缆系统中使用的系统均衡器和均衡方法，其中使用自动增益控制（AGC）潜入式中继器来补偿由重复的海底电缆的周围环境中的温度波动引起的电缆损耗的波动 系统。 在连接到重复的海底电缆系统的终端设备中，重复使用的电缆系统的季节性未对准由具有对应于AGC浸没中继器中的补偿误差的总和的损耗频率特性的可切换均衡器来均衡。 中继电缆系统的短期电平波动由自动均衡器补偿，自动均衡器具有与频率f的平方根成正比的损耗频率特性，并由通过重复的海底电缆系统传输的导频信号的电平控制。 一个未知的固定偏差最终由第二个可调平衡器相等。
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