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1. 发明授权

US5349699A Radio receiver with masking of switchover noise 失效
标题翻译：具有屏蔽切换噪声的无线电接收机
公开(公告)号：US5349699A
公开(公告)日：1994-09-20
申请号：US824205
申请日：1992-01-22
申请人： Peter Erben , Helmut Liman , Wilhelm Hegeler , Harald Bochmann , Jurgen Kasser , Werner Henze
发明人： Peter Erben , Helmut Liman , Wilhelm Hegeler , Harald Bochmann , Jurgen Kasser , Werner Henze
IPC分类号： H03J7/18 , H04B1/10 , H04B1/16 , H04H20/26 , H04H40/81
CPC分类号： H04H20/22 , H04B1/163 , H04H2201/13 , H04H40/81
摘要： The Radio Data System (RDS) protocol promulgated by the European Broadcasting Union provides for alternate frequencies (AF) for the same broadcast. Receivers periodically switch over to such an alternate frequency, leading to momentary crackling noises. In a radio receiver having a device for temporary switchover from a received frequency to some other frequency, substitute signals are inserted into the audio signals that are interrupted during the temporary switchover. The substitute signals are formed from the audio signals before and optionally also after the temporary switchover.
摘要翻译：由欧洲广播联盟颁布的无线电数据系统（RDS）协议为同一广播提供了替代频率（AF）。接收器定期切换到这样的交替频率，导致瞬间的咔嗒声。在具有用于从接收频率暂时切换到其他频率的设备的无线电接收机中，将替代信号插入到在临时切换期间被中断的音频信号中。替代信号由临时切换之前的音频信号形成，也可选择地在临时切换之后形成。

2. 发明授权

US5247705A Combination broadcast receiver and mobile telephone 失效
标题翻译：组合广播接收机和移动电话
公开(公告)号：US5247705A
公开(公告)日：1993-09-21
申请号：US671261
申请日：1991-03-18
申请人： Joachim Attig , Jurgen Kasser , Helmut Liman , Matthias Scholz
发明人： Joachim Attig , Jurgen Kasser , Helmut Liman , Matthias Scholz
IPC分类号： H04Q9/00 , B60R16/02 , B60R16/037
CPC分类号： B60R16/0373
摘要： A combination broadcast receiver and mobile telephone for motor vehicles is disclosed, in which acoustically operating devices are always switched off in the motor vehicle when a voice command detection circuit is switched on.
摘要翻译：公开了一种用于机动车辆的组合广播接收机和移动电话机，其中当语音指令检测电路被接通时，声学操作装置总是在机动车辆中关闭。

3. 发明授权

US5345607A RDS radio receiver with program type mode 失效
标题翻译：带程序类型模式的RDS无线电接收器
公开(公告)号：US5345607A
公开(公告)日：1994-09-06
申请号：US822305
申请日：1992-01-17
申请人： Helmut Liman , Wiedhold Warnecke
发明人： Helmut Liman , Wiedhold Warnecke
IPC分类号： H03J7/18 , H04B1/16 , H04H60/47
CPC分类号： H04H60/47 , H04H2201/13
摘要： A program type PTY mode is integrated into an RDS radio receiver with a limited access surface by means of a mode switch in that the function of the station keys is changed to that of program type keys and that by way of a multiple actuation of the keys it is possible to call up sequentially different program chains having the same type of program at that moment.
摘要翻译：程序类型PTY模式通过模式切换被集成到具有受限访问表面的RDS无线电接收机中，因为站键的功能被改变为程序类型键的功能，并且通过多个键的操作那时可以调用具有相同类型程序的顺序不同的程序链。

4. 发明授权

US4334320A Traffic information radio signal receiver 失效
标题翻译：交通信息无线电信号接收机
公开(公告)号：US4334320A
公开(公告)日：1982-06-08
申请号：US210323
申请日：1980-11-25
申请人： Helmut Liman
发明人： Helmut Liman
IPC分类号： G08G1/09 , H04B1/16
CPC分类号： G08G1/093 , G08G1/094
摘要： To simulate presence of a traffic information signal in a traffic information receiver which is muted upon reproduction of tape cassette programs or operated at a predetermined level, a momentary-operating control button is connected to a timing circuit to establish a timing interval which, when exceeded, provides a signal to a traffic information transfer switch to transfer the signals received from the receiver through the traffic information channel to permit setting of the volume level under traffic information conditions as desired and to demonstrate the operability under such conditions; upon release of the button, the system reverts to reproduction of tape or traffic information signals received by the receiver. Traffic information can thus be simulated even though no traffic information is being radiated by the transmitter to which the receiver is tuned.
摘要翻译：为了模拟交通信息接收机的存在，在交换信息接收机中，当再现磁带盒程序或者以预定的电平运行时，该信号接收器被静音，瞬时操作的控制按钮被连接到定时电路以建立定时间隔向业务信息传送交换机提供信号，以通过交通信息信道传送从接收机接收到的信号，以允许根据需要在交通信息条件下设置音量级别并且在这种条件下证明可操作性; 在释放按钮时，系统恢复到由接收器接收的磁带或交通信息信号的再现。因此，即使接收机调谐到的发射机没有辐射交通信息，也可以模拟交通信息。

5. 发明授权

US4006419A Pulse interference blanking circuit for radio receivers 失效
标题翻译：用于无线电接收机的脉冲干扰消隐电路
公开(公告)号：US4006419A
公开(公告)日：1977-02-01
申请号：US599134
申请日：1975-07-25
申请人： Helmut Liman
发明人： Helmut Liman
IPC分类号： H03G3/34 , H04B1/10
CPC分类号： H03G3/345 , H04B1/10
摘要： After a preliminary differentiation, the demodulated signal is supplied in parallel to a peak rectifier and to a second differentiating network, the outputs of the latter two circuits being added in the input circuit of a switching transistor that controls the blanking gate of a receiver. The value of the resistor across the output capacitor of the peak rectifier, as well as the rectifier capacitor, is so chosen in value that periodically recurrent pulses that may be persistently present in the signal build up a blocking bias on the switching transistor reducing its sensitivity and preventing corresponding differentiated pulses from switching it on, whereas occasionally or irregularly appearing pulses develop a negligible bias through the rectifier, so that their twice differentiated derived pulses will switch on the transistor and produce blanking.
摘要翻译：在初步区分之后，解调信号并行提供给峰值整流器和第二微分网络，后两个电路的输出被加到控制接收器的消隐门的开关晶体管的输入电路中。峰值整流器的输出电容器以及整流器电容器两端的电阻值被选择为可以持续存在于信号中的周期性复现脉冲，从而在开关晶体管上形成阻塞偏置，从而降低其灵敏度并且防止相应的微分脉冲接通，而偶尔或不规则地出现的脉冲通过整流器产生可忽略的偏置，使得它们的二次微分导出脉冲将导通晶体管并产生消隐。

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