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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：US4298983A
公开(公告)日：1981-11-03
申请号：US88521
申请日：1979-10-26
IPC分类号： H04B14/00
CPC分类号： H04B14/006
摘要： An automatic amplitude and phase equalization system in an FM communication circuit, in which a pilot signal included in a baseband signal of a transmitted FM signal demodulated by an FM demodulator is extracted and frequency-multiplied, a high harmonic wave of the pilot signal generated in the baseband signal is phase-detected using the frequency-multiplied output as a reference signal, an amplitude equalizer provided before the FM demodulator is driven by a component included in the phase detected output and of the same phase as the reference signal, and a phase equalizer provided before the FM demodulator is driven by a component included in the phase detected output and orthogonal to the reference signal, whereby amplitude and phase characteristics of a transmission path of the FM signal are automatically equalized.
摘要翻译： 一种FM通信电路中的自动幅度相位均衡系统，其中包括在由FM解调器解调的发送的FM信号的基带信号中的导频信号被提取并倍频，产生的导频信号的高次谐波 使用倍频输出作为参考信号来对基带信号进行相位检测，在FM解调器之前提供的幅度均衡器由包含在相位检测输出中的分量驱动并且与参考信号相同的相位被驱动，相位 在FM解调器由包括在相位检测输出中并与参考信号正交的分量驱动之前提供的均衡器，由此FM信号的传输路径的振幅和相位特性自动相等。
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公开(公告)号：US4285045A
公开(公告)日：1981-08-18
申请号：US88824
申请日：1979-10-26
CPC分类号： H03H17/06 , H04L25/03133
摘要： A smear filter and/or a de-smear filter having the characteristics that the delay time is proportional to the frequency comprising (a) a transversal filter having a plurality of delay elements connected in series with one another, the delay time (T) of each delay element being the same as the sampling interval of the input signal, the first delay element being connected to the input terminal, a plurality of potentiometers each connected to the junction points of said delay elements and the output of the last delay element providing the tap weight to each of the tap output, and an adder for providing the sum of the outputs of said potentiometers to provide an output of the present delay circuit, (b) a digital memory storing the precalculated value for each desired delay characteristics for providing the tap weights of said potentiometers, and (c) means for providing the content of said digital memory selectively to the potentiometers according to the desired delay characteristics.
摘要翻译： 具有延迟时间与频率成比例的特征的拖尾滤波器和/或去除滤波器，包括：（a）具有彼此串联连接的多个延迟元件的横向滤波器，延迟时间（T） 每个延迟元件与输入信号的采样间隔相同，第一延迟元件连接到输入端子，多个电位器各自连接到所述延迟元件的连接点，并且最后延迟元件的输出端提供 每个抽头输出的抽头权重和用于提供所述电位器的输出之和以提供本延迟电路的输出的加法器，（b）数字存储器，存储每个期望延迟特性的预计算值，以提供 所述电位器的抽头重量，以及（c）用于根据期望的延迟特性向所述电位器选择性地提供所述数字存储器的内容的装置。
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公开(公告)号：US4227160A
公开(公告)日：1980-10-07
申请号：US969364
申请日：1978-12-14
CPC分类号： H04L25/03038
摘要： A transversal type automatic equalizer comprises a transversal filter having a plurality of taps separated by time delay intervals, said transversal filter receiving input signals from a transmission line, a plurality of potentiometers being connected to each of said taps to provide a tap weight and the outputs of the potentiometers being summed up to provide an equalized output signal, and said potentiometers being adjusted by an equalization arithmetic unit. The potentiometers and thereby the tap weights are adjusted according to the output of the arithmetic unit whereby an equalized output with a suppressed ripple characteristic is produced.
摘要翻译： 横向型自动均衡器包括具有由时间延迟间隔分开的多个抽头的横向滤波器，所述横向滤波器接收来自传输线的输入信号，多个电位计连接到每个所述抽头以提供抽头重量，并且所述输出 电位计的总和以提供均衡的输出信号，并且所述电位计由均衡运算单元调整。 根据运算单元的输出调节电位器，从而调节抽头的重量，从而产生具有抑制纹波特性的均衡输出。
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公开(公告)号：US4293952A
公开(公告)日：1981-10-06
申请号：US61398
申请日：1979-07-27
申请人： Michitoshi Tamori , Kazuo Kawai
发明人： Michitoshi Tamori , Kazuo Kawai
CPC分类号： H04B3/142 , H04L25/03038
摘要： In a sampling function type equalizer having a transversal filter with a plurality of potentiometers, the tap weights of the transversal filter are adjusted according to the desired values of the amplitude-frequency characteristics A.sub.p (n), and the delay-frequency characteristics .tau..sub.p (n). The first multiplication of A.sub.p (n) and the predetermined discrete function in addition to the second multiplication of said .tau..sub.p (n) and said predetermined discrete function, are performed. Also, the Bessel function is provided according to the product of the second multiplication. The first convolution integration is performed for the product of the first multiplication, the second convolution integration is performed for the output of the Bessel function, and the third convolution integration is performed between the results of said first and the second convolution integrations. The result of the third convolution integration provides the tap weights of the potentiometers of the transversal filter.
摘要翻译： 在具有具有多个电位计的横向滤波器的采样功能型均衡器中，根据振幅 - 频率特性Ap（n）的期望值和延迟频率特性τp（n）来调整横向滤波器的抽头权重， n）。 执行除了所述τp（n）和所述预定离散函数的第二乘法之外的Ap（n）和预定离散函数的第一乘法。 此外，贝塞尔函数根据第二乘法的乘积来提供。 对于第一乘法的乘积执行第一卷积积分，对贝塞尔函数的输出执行第二卷积积分，并且在所述第一和第二卷积积分的结果之间执行第三卷积积分。 第三卷积积分的结果提供横向滤波器电位器的抽头权重。
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公开(公告)号：US4013981A
公开(公告)日：1977-03-22
申请号：US588221
申请日：1975-06-19
CPC分类号： H04B3/145
摘要： An equalizer having improved amplitude characteristics and phase characteristics of more than several hundred MHz has been found by using a four port directional coupler. The equalizer consists of coupled lines, and two far end ports of the directional coupler are grounded through two resistances R.sub.1, respectively; while interconnecting the two far end ports through a resistance r, an input port is formed at one of the near end ports of the directional coupler, and an output port is formed at the other end thereof, said resistances substantially satisfying the relation ofG.sub.1 (G.sub.1 +2g)=G.sub.0.sup.2 Z.sub.0o Z.sub.0e =R.sub.0.sup.2where, G.sub.1 =1/R.sub.1,g=1/r,G.sub.0 =1/R.sub.0, R.sub.0 being resistance of a power source and a load, Z.sub.Oo being the odd mode impedance of a coupled line, and Z.sub.0e being the even mode impedance of the same.
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7.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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