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公开(公告)号：US4169286A
公开(公告)日：1979-09-25
申请号：US914108
申请日：1978-06-09
CPC分类号： H04B7/2125 , H04L7/042
摘要： A surface acoustic wave device is used as a unique word detector and coherent demodulator for a digital code differential phase-shift signal. The device improves code word detection by providing a coherent reference with a correlation gain of 10 log M dB. M is the additional number of fingers introduced into the surface acoustic wave device, which determine the phase of the unique word. To achieve this result with higher reliability and higher correlation coefficient, use is made also of a few bits of the clock recovery which precede the unique word in a preamble as used in Time Division Multiple Access (TDMA) systems. The device requires two interdigital output transducers, one of which provides a maximum output in response to surface acoustic waves representing the unique word, and the other of which provides a maximum output in response to surface acoustic waves corresponding to a preassigned pattern of the unique word, such as a sequence of all zeros combined with a partial sequence of the clock recovery bits. The outputs of the two interdigital output transducers are maximized at the same instant to detect the auto-correlation peak of the unique word with performance equivalent to coherent demodulation. Also, clock and data are recovered in the second set of interdigital transducers.
摘要翻译： {PG，1 A表面声波装置用作数字码差分相移信号的唯一字检测器和相干解调器。 该器件通过提供具有10log M dB的相关增益的相干参考来改进码字检测。 M是引入声表面波器件的额外数量的手指，这决定了独特字的相位。 为了以更高的可靠性和更高的相关系数实现该结果，还使用在时分多址（TDMA）系统中使用的前导码中的唯一字之前的时钟恢复的几比特。 该装置需要两个叉指式输出换能器，其中之一提供响应于表示独特字的表面声波的最大输出，另一个响应于对应于唯一字的预分配图案的表面声波提供最大输出 ，例如与时钟恢复位的部分序列组合的全零序列。 两个交叉指示输出变换器的输出在同一时刻被最大化，以检测具有与相干解调相等的性能的唯一字的自相关峰值。 而且，在第二组交叉指示器中恢复时钟和数据。
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公开(公告)号：US4475211A
公开(公告)日：1984-10-02
申请号：US417753
申请日：1982-09-13
CPC分类号： H04L27/01
摘要： An adaptive equalizer performs equalization at IF, demodulates the input signal and then generates the equalization coefficients at baseband from the demodulated data. Coefficient updating can be done on a non-real time basis and coefficients for individual bursts stored in a coefficient memory for retrieval when the same burst occurs in the next frame, thus obtaining a pseudo-continuous equalization for each burst. The error signal is derived from demodulated equalized data and correlated with demodulated unequalized data to generate the correlation coefficients, and individual error signals from each channel can be combined into a single composite error signal for correlation purposes.
摘要翻译： 自适应均衡器在IF进行均衡，对输入信号进行解调，然后从解调数据生成基带的均衡系数。 可以在非实时基础上进行系数更新，并且当在下一帧中发生相同的突发时，存储在系数存储器中用于检索的各个突发的系数，从而获得每个突发的伪连续均衡。 误差信号是从解调的均衡数据导出的，并与解调的不相等的数据相关，以产生相关系数，并且每个信道的各个误差信号可以组合成单个复合误差信号进行相关。
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公开(公告)号：US4274067A
公开(公告)日：1981-06-16
申请号：US79653
申请日：1979-09-27
申请人： Vasil Uzunoglu
发明人： Vasil Uzunoglu
CPC分类号： H03L7/24 , H04L7/027 , H04L7/0083
摘要： A clock recovery network uses a voltage proportional to the incoming symbol rate as a coarse tuning signal to control the tuned center frequency of a voltage controlled oscillator. The incoming data is used to positively synchronize the oscillator to the incoming data stream.
摘要翻译： 时钟恢复网络使用与输入符号率成比例的电压作为粗调信号来控制压控振荡器的调谐中心频率。 输入数据用于将振荡器正确地同步到输入数据流。
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公开(公告)号：US4368542A
公开(公告)日：1983-01-11
申请号：US134735
申请日：1980-03-27
申请人： Vasil Uzunoglu
发明人： Vasil Uzunoglu
IPC分类号： H04L27/227 , H04B1/16
CPC分类号： H04L27/2276
摘要： A phase canceller for a carrier recovery network (CRN) to cancel phase shifts associated with the band pass filter in the network. The canceller is a semiconductor device receiving an input signal at one junction to cause emitted carriers to migrate to a collector at a controlled rate determined by an applied electric field between a pair of ohmic contacts located between emitter and collector junctions with the field control by a signal from a phase detector in the AFC loop of the CRN.
摘要翻译： 用于载波恢复网络（CRN）的相位消除器，用于消除与网络中的带通滤波器相关联的相移。 消除器是在一个接点处接收输入信号的半导体器件，以使得发射的载流子以由位于发射极和集电极结之间的一对欧姆触点之间的施加的电场确定的受控速率迁移到集电极，通过场控制由 来自CRN的AFC回路中的相位检测器的信号。
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公开(公告)号：US4356456A
公开(公告)日：1982-10-26
申请号：US171074
申请日：1980-07-22
申请人： Vasil Uzunoglu
发明人： Vasil Uzunoglu
CPC分类号： H03L7/24 , H03B5/1203 , H03B5/1231 , H03B5/124 , H03D11/04 , H03B19/12 , H03B19/14 , H03B2200/0034 , Y10T307/527
摘要： A synchronous oscillator is provided to divide the frequency of an input signal by a noninteger number, the noninteger number being expressed as the ratio of two whole integers X/Y. The oscillator is tuned to the desired output frequency, whereby every Yth cycle of the output signal is synchronized by every Xth cycle of the input signal at the negative (and possibly positive) peak of the output signal, thereby effecting a simultaneous multiplication and division of the input frequency of Y and X respectively. A pulse forming network provides the input signal in the form of pulses, whereby synchronization is effected at precise points in time. Pulse width and amplitude are adjustable to vary the input signal energy.
摘要翻译： 提供同步振荡器以将输入信号的频率除以非整数，非整数被表示为两个整数X / Y的比。 振荡器被调谐到期望的输出频率，由此输出信号的每Y个周期在输出信号的负（也可能是正的）峰值处的输入信号的每第X个周期被同步，从而实现同时的乘法和除法 分别为Y和X的输入频率。 脉冲形成网络以脉冲的形式提供输入信号，由此在精确的时间点进行同步。 脉冲宽度和幅度可调，以改变输入信号能量。
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6.发明授权Carrier recovery network for QPSK modems employing synchronized oscillators 失效采用同步振荡器的QPSK调制解调器的载波恢复网络
公开(公告)号：US4355404A
公开(公告)日：1982-10-19
申请号：US153289
申请日：1980-05-27
申请人： Vasil Uzunoglu
发明人： Vasil Uzunoglu
IPC分类号： H04L27/227 , H03B5/12 , H03D7/16
CPC分类号： H04L27/2276
摘要： A carrier recovery network for QPSK modems employs a synchronous oscillator which may be used as a frequency multiplier, divider and tracking bandpass filter. A preferred embodiment of the carrier recovery network includes a multiply-by-four circuit to remove QPSK data modulation, and a synchronous oscillator tuned to one-fourth the input frequency to thereby act as a frequency divider and tracking bandpass filter to provide a recovered carrier signal.
摘要翻译： 用于QPSK调制解调器的载波恢复网络采用可用作倍频器，分频器和跟踪带通滤波器的同步振荡器。 载波恢复网络的优选实施例包括用于去除QPSK数据调制的多乘四电路，以及调谐到输入频率四分之一的同步振荡器，从而用作分频器和跟踪带通滤波器以提供恢复的载波 信号。
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公开(公告)号：US06667666B2
公开(公告)日：2003-12-23
申请号：US10235394
申请日：2002-09-05
申请人： Vasil Uzunoglu
发明人： Vasil Uzunoglu
IPC分类号： H03B508
CPC分类号： H03L7/24 , H03B5/1203 , H03B5/1231 , H03B5/1296 , H03B2200/0074 , H03L7/083 , H04L7/027
摘要： A modification of the synchronous oscillator is described, having regenerative positive feedback. The circuit includes an amplifier, a high-Q tank circuit, and a conventional synchronous oscillator feedback network. An additional feedback path provides a negative impedance conversion effect.
摘要翻译： 描述了具有再生正反馈的同步振荡器的修改。 该电路包括放大器，高Q槽电路和常规的同步振荡器反馈网络。 额外的反馈路径提供负阻抗转换效果。
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公开(公告)号：US4438355A
公开(公告)日：1984-03-20
申请号：US375603
申请日：1982-05-06
申请人： Vasil Uzunoglu
发明人： Vasil Uzunoglu
IPC分类号： H04L27/227 , H03K5/153 , H03K3/26
CPC分类号： H04L27/2276
摘要： A phase canceller for a carrier recovery network (CRN) to cancel phase shifts associated with the band pass filter in the network. The canceller is a semiconductor device receiving an input signal at one junction to cause emitted carriers to migrate to a collector at a controlled rate determined by an applied electric field between a pair of ohmic contacts located between emitter and collector junctions with the field control by a signal from a phase detector in the AFC loop of the CRN.
摘要翻译： 用于载波恢复网络（CRN）的相位消除器，用于消除与网络中的带通滤波器相关联的相移。 消除器是在一个接点处接收输入信号的半导体器件，以使得发射的载流子以由位于发射极和集电极结之间的一对欧姆触点之间的施加的电场确定的受控速率迁移到集电极，通过场控制由 来自CRN的AFC回路中的相位检测器的信号。
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公开(公告)号：US4387310A
公开(公告)日：1983-06-07
申请号：US178425
申请日：1980-08-15
申请人： Vasil Uzunoglu
发明人： Vasil Uzunoglu
CPC分类号： H03K5/14
摘要： A temperature stabilized semiconductor delay element is comprised of an emitter and collector separated on a substrate by distance l. A voltage applied to ohmic contacts on either side of the emitter and collector provides an electric field E, whereby the delay .tau. between the emitter and collector is given by .tau.=l.sup.2 /.mu.E, where .mu. is the semiconductor mobility which varies with temperature. A compensation device located on the same substrate as the delay device provides the delay device with an electric field E=K/.mu., where K is constant, such that .tau.=l.sup.2 /K. The time delay .tau. is thus independent of temperature.
摘要翻译： 温度稳定的半导体延迟元件由在衬底上以距离l分隔开的发射极和集电极组成。 施加到发射极和集电极两端的欧姆接触器的电压提供电场E，由此发射极和集电极之间的延迟τ由τ= 12 /μE给出，其中μ是随温度变化的半导体迁移率。 位于与延迟装置相同的衬底上的补偿装置为延迟装置提供电场E = K / mu，其中K是常数，使得τ= 12 / K。 时间延迟τ因此与温度无关。
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公开(公告)号：US4101966A
公开(公告)日：1978-07-18
申请号：US782127
申请日：1977-03-28
申请人： Vasil Uzunoglu
发明人： Vasil Uzunoglu
CPC分类号： G06G7/163
摘要： An operational amplifier uses p- and n-channel enhancement type MOSFETs as variable input resistors on the inverting and non-inverting legs, respectively, of the amplifier, and the sources and gates of the MOSFETs are tied together. By using V.sub.S, the source-to-ground voltage, and V.sub.GS, the gate-to-source voltage, as input signals, the device will perform 4-quadrant multiplication at operating frequencies as high as 400MHz.
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