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    • 1. 发明授权
    • Arrangement for the synchronization of the radio transmission in a
radiotelephone subscriber connection network
    • 无线电话用户连接网络中的无线电传输同步的装置
    • US6009085A
    • 1999-12-28
    • US680928
    • 1996-07-16
    • Robert Lechner
    • Robert Lechner
    • H04B7/26H04J3/16
    • H04B7/2693
    • The arrangement synchronizes the radio transmission in a radiotelephone subscriber connection network. The connection network for the subscriber connection to the telecommunication exchange (LE) is divided into a central control unit (RDU), at least one concentrating, decentralized unit (RBC), as well as a plurality of base stations (RBS) between which and subscriber stations the radio transmission to be synchronized occurs. The decentralized units contain receivers (GPS-E) for reference signals of a radio-locating system, for example GPS, beamed out by satellites and derive time signals therefrom for the time-division multiplex radio frame of the base stations that they transmit thereto via a U-interface (U).
    • 该布置使无线电话用户连接网络中的无线电传输同步。 用于与电信交换机(LE)的用户连接的连接网络被划分为中央控制单元(RDU),至少一个集中分散单元(RBC)以及多个基站(RBS) 用户台将发生要同步的无线电传输。 分散单元包含用于由卫星发射的无线电定位系统(例如GPS)的参考信号的接收机(GPS-E),并且从其导出时间信号,用于通过它们向其发送的基站的时分多路复用无线电帧 U接口(U)。
    • 6. 发明授权
    • Circuit arrangement for consecutively monitoring operating conditions of
direct current devices
    • 连续监控直流设备运行状况的电路布置
    • US4327253A
    • 1982-04-27
    • US184761
    • 1980-09-08
    • Robert Lechner
    • Robert Lechner
    • H04Q1/32H03K17/00H04M3/02H04M3/06H04M3/22H04M19/00H04Q3/72
    • H04M3/2272
    • The circuit arrangement monitors operating conditions of consecutively sampled direct current devices. The operating conditions are represented by different potentials occurring at a sampling connector of each different direct current device. A selector unit has parallel signal inputs, each of which inputs is connected to a respective sampling point of a DC device. A comparator is coupled by a first input to a reference voltage source and by a second input to the output of the selector unit. An output of the comparator is connected to a shift register buffering the output signals of the comparator for one monitoring cycle. The selector unit and the shift register are commonly controlled for synchronous selecting operation and shifting, respectively. There is arranged a feedback network between the output of the shift register and the first input of the comparator for superposing a positive feedback signal on the reference voltage.
    • 该电路装置监视连续采样的直流装置的工作条件。 操作条件由在每个不同直流设备的采样连接器处发生的不同电位表示。 选择器单元具有并行信号输入,每个输入连接到DC设备的相应采样点。 比较器通过第一输入耦合到参考电压源,并通过第二输入耦合到选择器单元的输出端。 比较器的输出连接到缓冲比较器的输出信号的移位寄存器用于一个监视周期。 通常控制选择器单元和移位寄存器用于同步选择操作和移位。 在移位寄存器的输出和比较器的第一输入端之间布置有反馈网络,用于将正反馈信号叠加在参考电压上。
    • 7. 发明授权
    • Telecommunication subscriber line access circuit with ground key
indication and a device for call signal generation
    • 具有接地钥匙指示的通信用户线路接入电路和用于呼叫信号发生的设备
    • US4284853A
    • 1981-08-18
    • US127838
    • 1980-03-06
    • Robert Lechner
    • Robert Lechner
    • H04Q3/72H04M3/22H04M19/02H04Q1/20H04Q1/44H04Q3/00H04M3/02
    • H04Q3/00H04M19/026H04M3/2272
    • A subscriber line access circuit for use in a telecommunications system is disclosed. The subscriber line access circuit includes a power supply bridge in the form of a first resistor inserted in the b-wire (ground potential side) of a subscriber line, a second resistor inserted in the a-wire (supply potential side) of the subscriber line, and a capacitor which bridges the two wires at the terminals of the two resistors on the sides thereof opposite to the respective potential sources. This supply bridge is coupled on the capacitor side with a two-to-four wire hybrid transformer for the two-wire/four-wire transition to the system and includes an evaluating circuit which delivers an indicating signal when the subscriber actuates a ground key. A cutoff circuit is arranged in the power supply bridge between the first and/or second resistor in that bridge and the respective one or ones of the transformer windings at the junction points at which the evaluating circuit is connected. The device for generating call signals is connected to one of these junction points via a coupling contact and a series resistance. The associated cutoff contact of the supply bridge and the coupling contact of the call signal generating device are controlled in such a way that they can be closed only alternatively.
    • 公开了一种用于电信系统中的用户线路接入电路。 用户线路接入电路包括插入用户线的b线(地电位侧)的第一电阻器形式的电源桥,插入用户的a线(供电电位侧)的第二电阻器 线路和电容器,其在两个电阻器的与各个电位源相对的侧面的端子处桥接两条电线。 该电源电桥通过两线到四线混合变压器耦合在电容器侧,用于对系统进行双线/四线转换,并且包括评估电路,当用户启动接地钥时,该评估电路传递指示信号。 在该电桥中的第一和/或第二电阻器之间的电源桥中设置有断开电路以及在评估电路连接的连接点处的相应的一个或多个变压器绕组。 用于产生呼叫信号的设备经由耦合接点和串联电阻连接到这些接点之一。 供电桥和呼叫信号发生装置的耦合触点的相关联的截止触点被控制为使得它们可以仅被交替地闭合。