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1. 发明授权

US06324233B1 Reception of modulated carriers having asymmetrical sidebands 失效
标题翻译：接收具有不对称边带的调制载波
公开(公告)号：US06324233B1
公开(公告)日：2001-11-27
申请号：US09120625
申请日：1998-07-22
申请人： Adrianus Sempel , Eduard F. Stikvoort , Alphons A. M. L. Bruekers , Adrianus W. M. van den Enden , Rudy J. van de Plassche , Gerardus C. M. Gielis
发明人： Adrianus Sempel , Eduard F. Stikvoort , Alphons A. M. L. Bruekers , Adrianus W. M. van den Enden , Rudy J. van de Plassche , Gerardus C. M. Gielis
IPC分类号： H04B1400
CPC分类号： H04N5/4446 , H04B1/1036 , H04B1/26 , H04N5/4401 , H04N5/46
摘要： In a receiver for receiving a modulated carrier (MC) having asymmetrical sidebands (USB,LSB), for example, a TV signal, a synchronous demodulator (SDEM) derives a vectorial baseband signal (VB) from the modulated carrier (MC). A filter (FILT) filters the vectorial baseband signal so as to compensate for the sideband asymmetry, for example, by means of a Nyquist slope. Thus, the sideband asymmetry is compensated at baseband frequencies, rather than at an intermediate frequency, which allows a better quality of reception.
摘要翻译：在用于接收具有不对称边带（USB，LSB）的例如TV信号的调制载波（MC）的接收机中，同步解调器（SDEM）从调制载波（MC）导出矢量基带信号（VB）。滤波器（FILT）对矢量基带信号进行滤波，以便例如通过奈奎斯特斜率补偿边带不对称性。因此，边带不对称性在基带频率而不是中频处得到补偿，这允许更好的接收质量。

2. 发明授权

US4425478A Conference system for telephony 失效
标题翻译：电话会议系统
公开(公告)号：US4425478A
公开(公告)日：1984-01-10
申请号：US323622
申请日：1981-11-20
申请人： Job F. P. van Mil , Adrianus W. M. van den Enden , Teunis A. van Harreveld
发明人： Job F. P. van Mil , Adrianus W. M. van den Enden , Teunis A. van Harreveld
IPC分类号： H04M3/56
CPC分类号： H04M3/56 , H04M3/569
摘要： A conference system for establishing simultaneous interchange of information among a plurality of participants (E.sub.o -E.sub.k) comprises a conference network (CN). Each participant is connected to a terminal (n.sub.o -n.sub.k) which is connected to a hybrid network (CS.sub.o -CS.sub.k). The output (SW.sub.o -SW.sub.k) from the hybrid networks (CS.sub.o -CS.sub.k) are fed to summing amplifiers (SA.sub.o -SA.sub.k) in the conference network CN. The outputs of the summing amplifiers are fed to the participants via the hybrid networks (CS.sub.o -CS.sub.k).The summing amplifiers (SA.sub.o -SA.sub.k) are arranged so that the signals contributed by the participant to which the particular summing amplifier output is connected is multiplied by a factor .beta. while the signals contributed by the other participants are multiplied by a factor .alpha..By returning a portion of the signal generated by a participant to that participant it is possible to construct a system having a lower attenuation while maintaining stability.
摘要翻译：用于在多个参与者（Eo-Ek）之间建立信息的同时交换的会议系统包括会议网络（CN）。每个参与者连接到连接到混合网络（CSo-CSk）的终端（no-nk）。来自混合网络（CSo-CSk）的输出（SWo-SWk）被馈送到会议网络CN中的求和放大器（SAo-SAk）。加法放大器的输出通过混合网络（CSo-CSk）馈送给参与者。相加放大器（SAo-SAk）被布置成使得由特定求和放大器输出连接的参与者贡献的信号乘以因子β，而由其他参与者贡献的信号乘以因子α。通过将参与者产生的信号的一部分返回给该参与者，可以构建具有较低衰减的系统，同时保持稳定性。

3. 发明授权

US4477696A Conference system for telephony 失效
标题翻译：电话会议系统
公开(公告)号：US4477696A
公开(公告)日：1984-10-16
申请号：US323621
申请日：1981-11-20
申请人： Adrianus W. M. van den Enden , Job F. P. van Mil , Aloysius J. Nijman
发明人： Adrianus W. M. van den Enden , Job F. P. van Mil , Aloysius J. Nijman
IPC分类号： H04M3/56
CPC分类号： H04M3/56
摘要： A conference system comprises a conference circuit to which a plurality of participants are connected via terminals respective connecting circuits having input and output circuits, the signal from the output circuits being fed to the connecting circuit and signals from the conference circuit being fed lines to the input circuits. The conference circuit has summing amplifiers (10 to 13) whose inputs are connected to the outputs of the connecting circuits so that the output signals from the connecting circuits are algebraically summed. The signs of the signals to be summed are determined from the relationship E-S* S=O where E is the unity matrix and S* is the transposed complex conjugate matrix of S.
摘要翻译：会议系统包括会议电路，多个参与者通过端子连接各自具有输入和输出电路的连接电路，来自输出电路的信号被馈送到连接电路，并且来自会议电路的信号被馈送到输入电路。会议电路具有将输入连接到连接电路的输出的求和放大器（10至13），使得来自连接电路的输出信号被代数求和。根据关系E-S * S = O确定要求和的信号的符号，其中E是单位矩阵，S *是S的转置复共轭矩阵。

4. 发明授权

US4560836A Four-wire communication line circuit and conference network comprising such circuits 失效
标题翻译：包括这种电路的四线通信线路和会议网络
公开(公告)号：US4560836A
公开(公告)日：1985-12-24
申请号：US509821
申请日：1983-06-30
申请人： Adrianus W. M. van den Enden , Job F. P. van Mil
发明人： Adrianus W. M. van den Enden , Job F. P. van Mil
IPC分类号： H04M3/56
CPC分类号： H04M3/56 , H04M3/40
摘要： A four-wire communication line circuit for two or more two-wire subscriber lines, comprising a pair of amplifiers respectively connected in the line pairs of the four-wire line for each direction of transmission and a transmission direction detection circuit connected to each line pair. The detection circuit generates a control signal from the voltage signals transmitted on the line pairs, and which is dependent on the direction in which the net energy of such voltage signals is transmitted over the two-wire subscriber lines. The control signal is applied to control circuitry which switches the gain factors of the line amplifiers between a high and a low value, as determined by the direction of net energy transmission. When used in a conference network, the four-wire communication line circuit includes circuitry for establishing a higher threshold level at which the amplifier gain factors will be switched to a high level for transmission than the threshold level at which they are switched to a high value for reception.
摘要翻译：一种用于两个或更多个两线用户线路的四线通信线路电路，包括一对放大器，每对放大器分别连接在用于每个发送方向的四线制线路的线路对中，以及连接到每个线路对的发送方向检测电路。检测电路根据在线对上传输的电压信号产生控制信号，并且这取决于这种电压信号的净能量通过两线用户线路传输的方向。控制信号被施加到控制电路，该控制电路根据净能量传输的方向来确定线路放大器的增益因子在高和低值之间切换。当在会议网络中使用时，四线通信线路电路包括用于建立较高阈值电平的电路，在该阈值电平处，将放大器增益因子切换到高电平以进行传输，而不是将其切换到高值接待。

5. 发明授权

US4319092A Current detection circuit arrangement for an automatic telephone exchange 失效
标题翻译：用于自动电话交换的电流检测电路装置
公开(公告)号：US4319092A
公开(公告)日：1982-03-09
申请号：US149781
申请日：1980-05-14
申请人： Adrianus W. M. van den Enden , Job F. P. van Mil
发明人： Adrianus W. M. van den Enden , Job F. P. van Mil
IPC分类号： H04Q3/72 , H04M3/22 , H04Q1/38 , H04M3/02
CPC分类号： H04M3/2272 , H04Q1/38
摘要： Current detection circuit arrangement for an automatic telephone exchange for detecting currents in a system of two conductors having earth as the common return conductor. This circuit arrangement comprises a pair of measuring resistors R.sub.1, R'.sub.1 and a pair of voltage dividers R.sub.2, R.sub.5 and R.sub.3, R.sub.4 which are connected cross-wise and form a bridge. The loop current I.sub.d can be detected with this circuit arrangement. It is also desirable for the circuit arrangement to enable the detection of the longitudinal currents in the conductors. The present circuit arrangement comprises a pair of connecting points for a detector for the longitudinal currents, one point of which is connected to the tapping point of one and to the tapping point of the other voltage divider, respectively, by way of separate resistors, the other point being a point of reference potential.
摘要翻译：用于自动电话交换的电流检测电路装置，用于检测具有地线的两个导体的系统中的电流作为公共返回导体。该电路装置包括一对测量电阻器R1，R'1和一对分压器R2，R5和R3，R4，它们交叉连接形成桥。可以用该电路布置来检测回路电流Id。电路装置还希望能够检测导体中的纵向电流。本电路装置包括用于纵向电流的检测器的一对连接点，其一个点分别通过单独的电阻器连接到另一个分压器的一个和分接点的分接点，另一点是参考点潜力。

6. 发明授权

US4593387A Time division switching system 失效
标题翻译：时分切换系统
公开(公告)号：US4593387A
公开(公告)日：1986-06-03
申请号：US573782
申请日：1984-01-25
申请人： Thijs Krol , Adrianus W. M. van den Enden
发明人： Thijs Krol , Adrianus W. M. van den Enden
IPC分类号： H04Q3/52 , H04Q11/04 , H04Q11/06
CPC分类号： H04Q11/06
摘要： A time division switching system to which incoming and outgoing transmission channels designed for the transmission of bit streams subdivided into bits are connected. The system has a number N of time division switching stages, a number N of distributors and a number N of collectors, each distributor has N inputs to which an incoming transmission channel is connected, each collector has N outputs to each of which is connected an outgoing transmission channel, each distributor has N outputs, each of the N outputs of a distributor being connected to an input of each of the time division switching stages for a proportionate distribution according to a predetermined pattern of the bit stream of each incoming transmission channel over the N time division switching stages, and each collector has N inputs, each of the N inputs of a collector being connected to an output of each of the time division switching stages for collecting according to a predetermined pattern the bit streams for each outgoing transmission channel.
摘要翻译：时分切换系统，其连接用于被分配为比特的比特流的传输设计的输入和输出传输信道。该系统具有N个时分切换级，N个分配器和N个收集器，每个分配器具有连接到输入传输通道的N个输入，每个收集器具有N个输出，每个输出连接到输出传输信道，每个分配器具有N个输出，分配器的N个输出中的每一个根据每个输入传输信道的比特流的预定模式连接到每个时分切换级的输入，用于按比例分配 N个时分切换级，并且每个收集器具有N个输入，收集器的N个输入中的每一个连接到每个时分切换级的输出，用于根据预定模式收集每个输出传输通道的比特流。

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